Team Losi LOS-A0951 User manual
LOS-A0951
LOS-A0952
LOS-A0953
LOS-A0954
GTX
Kit
with
Bushings
&Pull Start Engine
OWNER'S
MANUAL
GTX Pro
Kit
with
Bearings & Pull Start Engine
GTX Pro
Kit
with
Bearings &Non Pull Start Engine
GTX Pro
Kit
with
Bearings &No Engine
• Carefully
read
through all instructions to familiarize yourseHwith the parts, construction, tuning tips,
and
techniques outlined in this manual. Being able to grasp
the
overall design
of
your GTXGas racing
truck
before construction will ensure a smooth assembly.
• Take your time
and
pay close attention to detail. Keep this manual for future reference.
TEAM LOSIINC., CHINO,
CA
91710
PIN
BOD-0070
MADE IN THE UNITED STATES OF AMERICA
WELCOME GTX OWNER!
Thank you
for
choosing the GTX truck as
your
vehicle to enjoy the exciting world
of
fuel powered, all, terrain racing. The
GTX
is the result
of
hundreds
of
hours worth
of
computer aided design and on-tracktesting
by
our
engineers and development
team. Needlessto say, you will soon come
to
appreciatethatthe GTX represents the latest
in
technology and meetsthe unique
demands
of
fuel powered, off-road racing.
Since fuel powered modelstend to require greater mechanical and tuning ability, it is importantthat you read through the
this manual completely before beginning assembly. A little extra time
now
will save building time and get you running sooner.
You
will find that
our
unique bag-by-bag assembly is both quick, and easytofollow.
You
will also noticethat
we
have included a
separate tip section along with helpful hints
throughout
this manual to help you tune yourGTX and maximizeyour enjoyment
of
this kit.
Once again, thank you for making a wise choice
...
the
GTX
TEAM LOSI
1. INTRODUCTION
GTX COMPLETED KIT DIMENSIONS
Length:
16-1
/2"
Wheel base: 11-1/4" Front Width: 12-3/4"
All dimensions at ride height.
NOTES & SYMBOLS USED
*Note:
this is a
common
note. It is used
to
call attention
to specific details
of
a certain step
in
the assembly.
.&.
IMPORTANT NOTE: Even if you are familiar with
Team
Losi kits, be sure and pay attention
to
these notes. They
point out very important details about a certain step
in
the as-
sembly. Do not ignore these notes!
~
This wrench designatesa performancetip. These
tips are not necessary, but can improve the performance
of
your
GTX
truck.
KIT/MANUAL ORGANIZATION
The
GTX
is composed
of
differentbags marked Athrough
H.
Each bag contains all
of
the parts necessary
to
complete'a
particular section
of
the GTX truck. Some
of
these bags have
subassembly bags within them. It is essential that you open
onlyone bag at a time and followthe correct sequence, other-
wise you mayface difficulties
in
finding the right part. It is help-
ful to read through the instructions for an entire bag prior to
starting assembly. Key numbers (in parenthesis) have been
assigned to each part and remain the same throughout the
manual.
In
some illustrations, parts which have already been
installed are
not
shown so that the current steps can be illus-
trated more clearly. Foryourconvenience, an actual size hard-
ware identification guide is included with each step.
To
check
apart,
hold_
it-againstthe silhouette until the correct partis iden- i
Rear Width: 12-3/8" Height: 5-3/4"
Weight will vary depending on accessories.
tified.
In
some cases extra hardware has been supplied
tore-
place easily lost parts. Different fits have been designed into
plastic parts (i.e. press, net, loose).
To
insurethat parts are not
lostduring construction, it is recommended that youworkover
a towel
or
mat to prevent parts from rolling away.
IMPORTANT SAFETY NOTES
1. Selectan areafor assemblythat is awayfrom the reach
of small children.
The
parts in the kit are small
and
can
be
swallowed
by
children, causing choking
and
possible internal
injury.
2. The shock fluid and greases supplied should be kept
outofchildren's reach. They were
not
intendedforhuman con-
sumption!
3.
Exercise care when using any hand tools, sharp in-
struments,
or
powertools during construction.
4.
Carefully read all manufacturer's warnings
and
cau-
tions for any glues, fuel, or paints that may be used for assem-
blyand operating purposes.
5. Gas poweredvehicles should notbe operated indoors.
6.
Be careful when handling your truck after it has been
run for any period
of
time. The engine and many parts can get
extremely
hot
while operating the truck.
TOOLS REQUIRED
Team Losi has supplied all allen wrenches and a special
wrench that is needed forassembly and adjustments. The fol-
lowing
common
tools will also be required: Small flatblade
screwdriver, phillipsscrewdriver, needle nose pliers, regular pli-
ers, scissors,
or
other
body
cutting/trimming tools. 3/16", 1/4",
5/16", and 3/8" nut drivers are optional.
RADIO/ELECTRICAL
A suggested radio layout is provided in this manual. Your high performance R/C center should
be
consulted regarding
specifics on radio/electrical equipment.
HARDWARE IDENTIFICATION
When in question, usethe hardware identification guide in each step. For screws, the prefix
number
designatesthe screw
size and number
of
threads per inch (i.e. 4-40 is
#4
screwwith 40threads
per
inch
of
length). Thefraction following designates
the length of
the
threadsforcap head screws, and the overall length for flathead screws. Bearings and bushings are referenced
by
the inside
diameterx
outside diameter. Shafts and pins are
diameterx
length. Washers are described
by
inside diameter or
the screw size that will pass through
the
inside diameter. 'E' clips are sized
by
the
shaft diameterthatthey are attached to.
FUEL
The fuel used
to
powerthe GTX
truck
is a special blend
of
oils and nitro. This fuel is highlyflammable and should
be
treated
as
such. Be sure
to
read anywarnings and cautionsthat mayappearon the packaging of
the
fuel. Because
of
the exhaustfumes
that are produced from running any gas powered vehicle, the GTX should not
be
operated indoors. Be careful when handling
yourtruckwhilethe engine is running. The exhaustfumes from thetuned pipe can cause irritation and burning
of
the eyes. Never
pointthe exhaustpipetowards
your
face. I
know
this sounds stupid,
but
we've all had it happen
to
us and it really isn't a pleasant
experience.
There are several differentbrands
of
fuel availableforthe gas powered engines. We havefound thatthe O'Donnel and Blue
Thunder fuels are more reliable and perform better than the others. It is not recommended that you use a model airplane or
model helicopterfuel in your GTX truck. The fuels for model airplanes and helicopters
do
not
have
the
propertypes, or content
ofoil in them. Model cars have a much
more
restricted airflow overthe engine,
so
the oilsthatare used in thefuel for model cars
help to cool the engine. Using a model airplane fuel may cause the engine
to
run hotter than desired.
FUEL BOTTLE
You
will need
some
sort
of
afuel bottle in order
to
fill the tank in
your
GTXwith fuel. Your local
hobby
shop should have fuel
bottles available.
STARTERS
Ifyou will be installing an engine that is not equipped with a pull start, you will need
to
have
some
sort ofan electric starter
in
order
to
startthe engine. There are several hand held electric starters available on the market. There are also a few manufac-
turers that
produce
starter boxes. A starter
box
is easier
to
use, but is usually more expensive. When attempting
to
start the
engine
in
your GTX truck with an electric starter, make certain that the engine is being turned the correct direction. Turning the
engine overthe wrong direction will cause the engine
to
run backwards.
GLOW IGNITER
You
will also need a
glow
plug igniter in order
to
start the engine in
your
GTX truck. There is a wide variety
of
glow
plug
igniters available. Check with your local
hobby
shop.
TABLE OF CONTENTS
1.
INTRODUCTION .......................................................... i 4. BAG C .................................................................... 9-16
Completed Kit Dimensions
......
....
..
.
...
..
...
.
..
.
....
.
..
...
..
.... i
5.
BAG D ................................................................. 17-21
Notes &Symbols......................................................... i
6.
BAG E .
..
...
...............
..
...
....
...
....
...
......................... 22-25
Kit Manual Organization .............................................
7.
BAG F....................................................................... 26
Important Safety Notes...............................................
8.
Engine Installation............................................... 27-35
Tools Required............................................................ 9. Radio Installation ................................................ 36-44
Radio/Electrical ..........................................................
ii
1
0.
Final Assembly........................................................ 45
Hardware Identification ..............................................
ii
11
. Tips from the Team ............................................ 46-48
2.
BAG A ...................................................................... 1-4 12. Spare parts ........................................................ 49-52
3.
BAG B ...................................................................... 5-8 13. Glossary
..
...........
...
..
......
..
.........
......
...............
..
....... 52
Team
Losi
is
continually changing
and
improving designs; therefore, the actual part
may
appear slightly different than the
illustrated part. Illustrations
of
parts and assemblies may be slightly distorted to enhance pertinent details.
ii
BAGA
Dmmmmlmllllllllllllllllllllllllllllllm
CD
Figure 1.
Step
1.
Insert a 4-40 x 3/4" cap head screw
(1)
through
the second hole
in
from the outside on each side
of
the front
shocktower
(2).
Thread a
top
shock
mount
bushing
(3)
onto
each
of
the two screws
(1).
2
Step
2.
Insert a 3/8" ball stud
(4)
into the inside
of
the
~
fourcamberholes on the bottom
ofthe
shocktower
(2).
Mount
the ball studs
(4)
from the same side
of
the shocktower
(2)
as
the screws
(1)
on both sides
of
the shock tower (2). Secure
the ball studs
(4)
with 4-40 lock nuts (5).
Dllllmllllllllllllllllllllllllllllllllilllllllllllllllll
Figure 2.
Step
3.
Secure the front shock tower
(2}
to the front
bulkhead
(6)
with two4-40x 7/8" cap head screws
(7}
as shown.
The screws
(7)
should extend through the front
of
the bulk-
head (6). Be sure that the shock mount bushings
(3)
face the
correct direction as shown
in
figure
2.
7
1
5
Figure 1
6
Figure 2
I! BAG A (Continued)
rn~------------~~
Figure 3.
Step
4.
Attach the front suspension arms [left
(8),
right
(9)] to the front bulkhead
(6}
by
sliding a 1/8" innerfront hinge
pin
(1
0)
through the arm
(8),
(9)
and bulkhead (6). Centerthe
hinge pin
(10)
and secure
it
with two 1/8"'E' clips
(11)
.
.& IMPORTANT NOTE:
Be
~ure
that the arms sweep
to the rear and the shock mounting area
is
facing up.
Figure 4.
Step
5.
Attach the front body mount slide
(12}
to the
front side ofthe front body mount support
(13}
by threading
two 4-40 x 3/8" cap head screws
(14}
into the top hole
in
the
body mount slide
(12}
(this hole
does
not
go
all the way
through), through the holes
in
the
body
mou.nt support
(13)
as
shown.
Step
6.
Place the body mount support
(13)
overthe two
screws
(7)
protrudingfrom thefront
of
the bulkhead
(6)
so that
the bodymountsupport
(13)
anglesforward. Secure the body
mount assembly with two 4-40 lock nuts (5).
*NOTE: Assure that the
body
mount
slide (12) angles
down,
to111ards
the front.
Figure 3
Figure 4
2
BAG
A (Continued)
oo-u
rn
liD
•
Figure 5. 0 @ @
Step
7.
Slide a front axle
(15)
into the right spindle
(16)
so
that the hole
in
the axle
(15)
lines
up
with the hole
in
the
spindle
(16).
*NOTE: Spindlesare
marked
with
'L'
and
'R'
to designate
left
and
right.
Step
8.
Place the assembled spindle
(16)
and axle
(15)
in
the right spindle carrier
(17)
so thatthe letter on the spindle
(16)
faces up. Insert a 1/8" x .960" hinge pin
(18)
through the
spindle carrier (17), spindle (16), and axle (15). Center the
hinge pin
(18)
in
the assembly and secure it with two 1/8"
'E'
clips
(11).
Step
9.
Ensure that the hinge pin
(18)
is centered
in
the
spindle carrier
(17)
and thread a 5-40 set screw
(19)
into the
rear of the front axle (15). Tighten the set screw against the
hinge pin
(18)
until snug.
Step 1
0.
Place a studded ball washer
(20)
over a 3/8"
ball stud
(4)
and thread the ball stud into the top hole of the
spindle carrier (17),
as
shown, until snug. Thread a 3/16" ball
stud
(21)
into the spindle from the top until snug.
Lt_
IMPORTANT NOTE: Refer
to
the illustration and
be
certain that the spindle carrier and spindle are assembled
correctly and the reference letters face the correct direction.
Step
11.
Repeat steps
7-1
0 for the left side parts [left
spindle
(22),
left spindle carrier (23)].
rnc__
__
_____j~
@
Figure 6.
Step
12.
Attach the right spindle carrier assemblyto the
right suspension arm
(9)
by sliding a 1/8" x .960" hinge pin
(18)
through the arm
(9)
and spindle carrier (17). Center the
hinge pin
(18)
in
the arm
(9)
and secure it with two 1/8"
'E'
clips
(11).
Lt_
IMPORTANT NOTE: Make sure that the letter on
the spindle faces up.
Step
13.
Repeat step 12 for left side.
@
~
@ @
21
15
Figure 5
Figure 6
3
20
BAG A (Continued)
IIIIIIIIIIIIIIIIIIIIIIIIIWIIIL!ld
111111111111111111111111111111111
Figure 7.
Step
14.
Thread a plastic rod end
(24)
onto each end ofa
1-7/8" turnbuckle (25). Tighten both rod ends equally until the
rod
is
the same length asthe rod shown
in
figure 7
A.
Maketwo
ofthe camber rod assemblies.
*NOTE: One
end
of
the turnbuckle has left
hand
threads.
Figure 8.
Step
15.
Place a "foam thing" (26) over each of the ball
studs
(4)
on the spindle carriers (17), (23) and the shocktower
(2).
Attach one side of each camber rod assembly from step
14to the ball stud
(4)
on the shocktower
(2)
and the other end
to the ball stud
(4)
on
the spindle carrier (17}, (23). Attach a
camber rod
to
both the left and the right side.
~
Mount
all
of the camber rods so that the adjust-
ment hex
is
to the outside of the truck. This will make future
adjustments much easier.
Figure 9.
Step
16.
Place thecompleted front suspension assembly
on
the front of the main chassis (27). Thread two 8-32 x 1/2"
screws
(28)
through the two rear holes
in
the front portion of
the chassis
(27)
and into the rear holes
in
the front bulkhead
(6).
Step 17. Align the front bumper (29) with the two forward
holes
in
the bottom of the chassis (27}. Secure the bumper
(29}
to the chassis bythreading two 8-32 x 1/2" screws through
the bumper (29}, the chassis (27), and intothe forward holesof
the front bulkhead (6). Tighten
all
four screws
(28}
until snug.
4
ol
25
:0
Figure 7
~======j!IIOOIIIIIII~III========~~r-----rr=J
Figure
7A
/
~/
Figure 8
Figure 9
BAG B
Figure 10.
Step
1.
Securethe steering posts {30) to the outerholes
in
the front
of
the chassis (27) using
two
4-40 x 3/8" flat head
screws (31) as shown.
~
A mild thread locking
compound
should be used
on
all
screws that are to be threaded into aluminum on this
vehicle.
If
athread locking compound isn't used, the vibration
from the gas powered engine will cause the screws to back
out.
@
@
Figure 11.
Step
2.
Thread a 3/8" ball stud
(4)
into the outer hole on
the shortarm
of
the steering bellcrank {32) as shown. Tighten
until snug. Do not over tighten!
Step
3.
Place a studded ball washer
{20)
over each
of
two 3/16" ball studs (21) and thread one into each
of
the outer
holes
in
the steering sector arm {33).
& IMPORTANT NOTE: When the ball studs face up,
the offsethole
in
thesector arm should face forward and tothe
left as shown.
Step
4.
Attach the steering bellcrank (32) to the sector
arm
(33)
by threading a 4-40 x 1/8" cap head shoulder screw
(34)
through the bellcrank (32) and into the offset hole
in
the
sector arm {33).
Step
5.
Attach the steering idler arm (35)
to
the sector
arm
(33)
bythreading a4-40 x 1/8" shoulderscrew
(34)
through
the idler arm (35) and intothe remaining hole
in
thesectorarm
{33). Tighten the
two
shoulder screws (34).
~
If the bellcrank or idler arm don't rotate freely
when the screws are tightened, remove the screw and lightly
file the area around the threads on the sectorarm. Attach the
part again and check for free movement. File the arm slightly
until the parts rotate easily. Again, it is a
good
idea to use a
mild thread locking
compound
in
the aluminum sector arm.
Step
6.
Place the bellcrank (32) and idler arm (35) over
the steering posts
{30)
as shown.
5
e
0
I
I
I
I
~
Figure
10
Figure
11
30
I' Ii BAG B (Continued)
lllllll!llllllllllllllllmllll
[§
1111111111111111111111mmllll
Figure 12.
Step
7.
Thread a plastic rod end (24) onto each end ofa
1-7/8"turnbuckle (25). Tighten both rod ends equally until the
rod
is
the same length as the rod shown in figure 12A. Make
two ofthe tie-rod assemblies.
Figure 13.
Step
8.
Attach one end ofa tie-rod assembly to the ball
stud
(21)
on the right side ofthe sector arm
(33)
and the other
end to the ball stud
(21)
on the right spindle (16).
Step
9.
Repeat step 8 for the left side.
~
Mount
all
of the camber rods so that the adjust-
ment hex
is
to the outside of the truck. This will make future
adjustments much easier.
©
Figure 14.
Step 10. Press a rubber tank mounting grommet
(36)
into each ofthe three large holes
in
the
top
of
the center chas-
sis
brace
(37)
as shown. The grommets
(36)
should be cen-
tered, top to bottom,
in
the holes ofthe chassis brace (37).
Figure 12
Figure 12A
Figure 13
Figure 14
6
BAG
B (Continued)
Figure 15.
Step
11
. Line up the three posts on the fuel tank
(38)
with the three holes with grommets
in
the centerchassis brace
(37).
Install the fuel tank
(38)
on the center chassis brace
(37)
from the bottom
by
pressing the three posts on the tank
(38)
through the three rubber grommets (36).
Step 12. Place a
#4
washer
(39)
over each ofthe three
4-40x3/8"cap head screws (14). Thread ascrew
(14)
through
each ofthe grommets
(36)
and into the posts
in
the fuel tank
(38).
Hold the tank
(38)
all
the way up against the chassis
brace (37). Tighten each of the three screws
(14)
until the
washer
(39)
just touches the grommet (36).
*NOTE:
The
screws should
not
be tightenedso that the
grommetsmashes.
By
tighteningthe screwsuntilthe washers
just touch the grommets, the tank will be "shock mounted".
This
helps
to
keep the fuelfrom foaming while running the truck.
Figure 16.
Step 13. Refer
to
figures 16A and 168. These are full
size drawings ofthe steering servo posts mounted
in
the two
different configurations. Hold yourservo uptothese diagrams
and align the mounting ears on your servo with the holes
in
the posts. This will determine howto mountthe steering servo
posts
(40).
Step
14.
Once you have determined the mounting posi-
tion ofthe steering servo posts (40), place the posts
(40)
into
the holes
in
the chassis
(27)
so that the posts are offset
in
the
correct direction from figure 16A or 168.
*NOTE:
If
you do
not
have your radio system
yet,
or
do
not know which servo you will use for steering
at
this time,
mount the posts according to figure
16A
and
continue.
The
direction
of
the posts can
be
changed
once
you have deter-
mined which servo you will use.
.& IMPORTANT NOTE: The 2nd and 5th hole from
the bottom
in
theservo mounting posts are largerthan the rest
ofthe holes. These holes should be positioned closestto the
chassis.
(f7)
r
Figure 16
I
i
i
i e
i
I
cD
/
39
®-
7
Figure 15
ll4•---Posts
out
---~~
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 16A
0
0
0
0
0
0
0
0
0
Posts in
---"'---L
Figure 16B
0
0
0
0
0
0
0
0
0
BAG B (Continued)
Figure 17.
Step 15. Place the center chassis brace (37) on
top
of
the chassis
(27).
Pay
particularattention tothe steering posts
(30)
and the servo mounting posts (40). The chassis brace
has two extensions that fit over the steering posts (30), and
the pins
in
the
top
of
the servo mounting posts
{40)
should fit
into two holes
in
the chassis brace (37). Once the chassis
brace
is
lined up and
in
place, secure ittothe front bulkhead
{6}
by threading two 8-32 x 1/2" screws
(28)
through the for-
ward holes
of
thechassis brace (37) and intothe holes
in
the
top ofthe front bulkhead (6).
Step 16. Secure the chassis brace {37} to the chassis
(27)
with five 4-40 x 3/8" flat head screws (31} as shown.
*NOTE: Make sure thatthe pins
on
the top
and
bottom
of
the steering servo mount stay located in the holes in the
chassis
and
the chassis brace.
~
There
is
an extra 4-40 x 3/8" cap head screw
packed
in
the wrench bag. This screw can be used to tap
the threads into all
of
the "Stiffezell" plastic parts such as the
center chassis brace. The larger cap head uses a 3/32"
wrench which will make it easier to start threads into the stiff
plastic than the small 1/16" wrench used on the flat head
screws. The cap head screw should be threaded
in
about
halfway and removed from each hole. This will make iteasier
to install theflat head screws and allowforthe lastfewthreads
to be tapped when
it
is
installed.
Figure 18. ®
' I
I '
i i
i
I
JI
~
'
l
Figure
17
·
Step 17. Refer to figures 18A and 188. These are full size drawings
of
the throttle servo mounts
(41)
attached to the
chassis
in
the two different configurations. Hold your servo upto these diagrams and align the mounting ears on your servo to
holes
in
the mounts. This will determine howto mountthe throttle servo mounts (41).
Step 14. Onceyou have determined the mounting position
of
the throttle servo mounts {41), attach each mount
(41)
tothe
chassis
{27)
with two 4-40 x 3/8" flat head screws
(31)
so that the mounts are offset the correct wayfrom figure 18A or 188.
*NOTE: Ifyou
do
not
have yourradio system yet,
or
do
not
know
which servoyou willuse for throttle
at
this time, attach the
servo mounts according to figure
1BA
and
continue.
The
direction
of
the mounts can
be
changed
once
you have determined
which servo you will use.
27
Figure 18 8
~
Top
holes
narrow---®
~
Figure18A
~
~Top
holes
wide-----®
~-----
Figure 18B
~
BAGC
8 Bag C requires that you pay close attention to the bearings involved
in
the assembly (disregard this note
for kit #A-0951). Some bearings used during the assembly ofthis bag are very similar in size. It
is
important that you open the bags only as they are needed. The bearings that are of concern are
packed in separate bags.
@
Figure 19. @
Step 1. Insert a 4-40 mini lock nut (42) intothe hex area
of the diff nut carrier (43). The thread locking portion of the
nut
(42)
should face the outside.
@
Fig 20. @
Step
2.
Locate the 5/64" allen wrench
(44)
supplied with
the kit. Place the diff nut carrier
(43),
nut side first, over the
allen wrench.
Step
3.
Stack the six beveled washers
(45)
over the
wrench, nextto the diffnutcarrier
(43).
The washers
(45)
should
all
point the same direction and open away from the nut car-
rier
(43)
as
shown.
Step
4.
Place the difftube
(46)
overthe wrench, big side
first, so that it rests against the beveled washers (45).
Fig 21.
Step
5.
Insert all of the parts that are stacked on the
wrench into one ofthe outdrive/diff halves (47). Line up the
tabs
on
the diff nut carrier
(43)
with the slots
in
the outdrive
(47).
Make certain thatthe difftube
(46)
is
pressed all the way
into the outdrive/diff half (47), and that it
is
straight. There
is
a
small shoulder on the difftube
(46)
that should be flush with
the outer surface ofthe outdrive (47).
Fig 22.
Step
6.
Apply a small amount of diff grease
(48)
to the
outside ring ofthe outdrive (47). Attach a diff washer
(49)
to
the outdrive
(47)
by
lining
up
the slot
in
the washer
(49)
with
the slot
in
the outdrive (47).
*Note: Only a small amount
of
grease is needed. It is
only there to holdthe diffwasher in place.
.&IMPORTANT NOTE: Do not glue the diff washers
to the outdrive/diff halves. Doing so may not allow the wash-
ers
to mount flat.
9
43
Figure
19
47
Ffli
\\\\\\
A
~
IIIII/
bd
Bevelled washers should
face
this
direction
Figure 20
43
Figure
21
44
SMALL
AMOUNT
OF
GREASE
Figure 22
BAG C (Continued)
0 © 0
Figure 23.
Step
7.
Insert a 5mm x 8mm bearing
(50)
[5mm x 8mm
bushing
(51)
if assembling
kit#
A-0951] intothe center
of
the
diff gear (52).
Step
8.
Press a 3/32" diff ball (53) into each
of
the small
holes
in
the diffgear (52).
Fig
24.
Step
9.
Apply a fairly heavy coat of diff grease
(48)
to
the exposed side
of
the diffwasher
(49)
that
is
already attached
to the outdrive (47).
Step 1
0.
Carefully place the diff gear (52) over the diff
tube
(46)
sothatthe diffballs
(53)
and diffgear
(52)
rest against
the greased diffwasher
(49)
.
.& IMPORTANT NOTE: It
is
a
good
idea
to
hold the
diff nut carrier
in
place so that the difftube is not moved when
the gear
is
pushed over it.
0 © 0
Fig
25.
Step 11. Inserta 5mm x 8mm bearing (50) [5mm x8mm"
bushing (51) if assembling
kit#
A-0951] into the second
outdrive/diffhalf
(47).
Makesure thatthebearing
(50)
[orbush-
ing (51)]
is
pushed all the wayintothe outdrive
(47).
The handle
of a hobby knife (with the blade removed) or a pencil can be
used to push the bearing
(50)
[or bushing (51)] into place.
Step 12. Dropthe 1/4" x 5/16" shim (54) intothe outdrive
(47), on
top
ofthe 5mm x 8mm bearing (50) [or bushing (51)].
Make sure that the shim
(54)
sits flat against the bearing
(50)
[or bushing (51)].
*NOTE:
Be
extra careful
not
to
bend
this shim!
10
~
\c/?bQ
cc;,
:
::
:
I
l1
I
I
II
I
I
l1
I
I
II
I
' ' '
IJJ
'I
I
,,
Figure 23
APPLY
GREASE
TO
WASHER
52
Figure
24
53
Figure 25
53
49
BAG
C (Continued)
@ @
Fig
26.
Step
13.
Locate the diffadjusting screw
(55)
and place
the foam thrust bearing seal
(56)
overthe shoulderofthe screw
(55).
Step
14.
Place one ofthe 3mmx 8mm raced thrust bear-
ing washers
(57)
over the diff screw
(55)
so that the groove
faces up.
Step
15.
Grease the thrust washer (57) well and place
the 3rnm x 8mm thrust bearing
(58)
over the screw
(55)
and
next tothe washer (57). Grease the exposed side ofthe thrust
bearing
(58)
well and placethe second thrustwasher
(57)
over
the screw and against the thrust bearing (58). This time the
groove
in
the thrust washer
(57)
faces down.
Step
16.
Very carefully insertthe diffscrew (55), with the
thrust bearing assembly installed, into the outdrive (47).
Be
very careful not to bend or pinch the shim
(54)
while inserting
the diffscrew (55). Pull the threaded end
of
the diffscrew
(55)
until the thrust bearing assembly rests against the shim
(54),
next to the bearing
(50)
[or bushing (51)], inside the outdrive
(47).
Fig
27.
Step
17.
Locate the smallest ofthe allen wrenches
(44)
and place
it
in
the slot
in
the outdrive
(47)
containing the diff
screw
(55).
Slide the wrench
all
the way down against the
screw
(55).
By handling the outdrive
(47)
with the wrench
inserted, the diffscrew
(55)
will be held in place while finishing
assembly ofthe diff.
Step
18.
Apply a small amount
of
grease
(48)
to the
outer ring of the outdrive (47). Install the second diff washer
(49),
again lining upthe slots
in
the outdrive
(47)
andthe washer
(49).
Step
19.
Apply a fairly heavy coat
of
diff grease
(48)
to
the exposed side ofthe diffwasher (49).
47
GREASE
Figure
26
49
Figure
27
11
SMALL
AMOUNT
OF
GREASE
44
i11'
''
I BAG C (Continued)
Fig
28.
Step 20. While holding the diff half (47) with the allen
wrench inserted, carefullyassemblethetwooutdrive/diffhalves
(47).
Step 21. Make sure that the slot in the diff screw
(55)
is
lined upwith the slot
in
the outdrive (47) and the allen wrench
is
inserted
in
the diff screw (55).
Step 22. Hold the diff so that the outdrive
(47)
with the
diff nut carrier (43) is pointing up. Slowly turn the
top
diff half
clockwise
to
thread the diff screw (55) into the 4-40 mini nut
(42)
in
the diffnut carrier (43). Thread the two halves together
until the screw just starts to snug up.
* Note:
If
the
screw
will
not
thread into the nut, make
sure thatthe
nut
carrieris
pushed
all
the way into the outdrive.
~
When tightening the diff, tighten the screw a little
and then "work" the diffa little. Then tighten the screw a little
more and "work" the diff again. Continue this until the diff
is
tight. This will ensure that all the parts
in
the diffassembly are
properly seated.
Step 23. Tighten the diff until the gear
(52)
can not be
turned while both of the outdrives (47) are being held firmly.
Final diff adjustment should be made after completion of the
truck.
lillllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
Fig 29.
Step 24. Thread the 4-40 x
1"
set screw (59) all the way
into the threaded side
of
the slippershaft (60). Make sure that
the set screw (59)
is
TIGHT!
~
A small amount of liquid thread lock will help to
hold the set screw securely
in
place.
Fig 30.
Step 25. Press the 1/16" x 5/16" pin (61) into the small
hole
in
the slipper shaft
(60)
so that it extends evenly from
both sides
of
the shaft (60).
Step 26. Slide the top gear (62) over the slipper shaft
(60)
from the side opposite the set screw (59). Line up the
groove
in
the gear
(62)
with the pin (61) and slidethe gear
(62)
over the pin (61).
Step 27. Secure the gear
(62)
to
the shaft
(60)
by insert-
ing a3/16" 'C' clip
(63)
intothe groove
in
the slippershaft (60).
_ · Step
28.
Inserta second
'C'
clip
(63)
intothe other groove
in
the
top
shaft (60).
Figure
28
59
Figure 29
Figure
30
12
52
BAG
C (Continued)
©
Fig
31.
Step
29
..
Insert a 3/16" x 3/8" bearing
(64)
[3/16" x 3/8"
bushing
(65)
if building
kit#
A-0951] into thetop bearing seat
of the left gearbox half (66).
Step
30.
Insert a 1/2" x 3/4" bearing
(67)
[1/2" x 3/4"
bushing
(68)
if building kit # A-0951] into the lower bearing
seat of the left gearbox half (66).
"------:::J
66
Figure
31
@ @
69
Fig
32.
Step
31.
Insert a 3/16" x 3/8" bearing
(64)
into the top
bearing seat ofthe right gearbox half (69). Carefully push the
bearing
(64)
all the way into the bearing seat using a pen or
the handle of a hobby knife (with the blade removed). Care
70
should be taken notto damage the bearing shields.
Step
32.
Press, and lightly tap the idler gear shaft (70),
into the hole in the center ofthe right gearbox half (69).
Step
33.
Insert a 1/2" x 3/4" bearing
(67)
[1/2" x 3/4"
bushing
(68)
if building kit # A-0951] into the lower bearing
seat ofthe right gearbox half (69).
Step
34.
Attach a 1/8"
'E'
clip
(11)
to one end of the
brake arm pin
(71)
and pressthe other end through the hole
in
the right gearbox half
(69)
as
shown. Push the pin
(71)
all the
way
in
so that the
'E'
clip
(11)
is
pushed against the inside of
the right gearbox half (69).
13
64
I
~
Figure 32
~I
I'
BAG C (Continued)
Fig 33.
Step 35. Slide the slipper shaft (60), threaded side first,
through the bearing
(64)
in the right gearbox half (69).
Step 36. Insert a 1/8" x 3/8" bearing (72) [1/8" x 3/8"
bushing
(73)
if building
kit#
A-0951] into each side
of
the idler
gear (74). Place the idler gear (74) over the idler gear shaft
(70).
Step 37. Insert the differential assembly into the 1/2" x
3/4" bearing (67) [or bushing (68)]
in
the right gearbox half
(69). Insert the differential, diff nut carrier (43) side first.
*Note: Align the teeth on all gears when installing the
differential.
Ollllllllllllllm~mrnlmllllllllllllllllillll
Dlllmi!IIIIIID~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fig 34.
CD
@
Step 38. Carefully assemblethe left gearboxhalf
(66)
to
the completed right gearbox half (69).
Step 39. Thread the 4-40 x 3/4" cap head screw
(1)
into
the rear hole
in
thetransmission housingfrom the leftside. Do
nottighten the screw
yet.
Justsnug
it
up.
Step 40. Slide the transmission brace (75) over the
top
shaft and against the right gearbox half (69) so that the three
holes
in
the brace
(75)
line
up
with thethree holes
in
the gear-
box half (69). Slide a 4-40 x
1-1
/8" button head screw
(76)
through the top, forward hole
in
the left gearbox half
(66)
and
thread
in
into the transmission brace (75).
Step 41. Slide a 4-40 x
1-1
/8" cap head screw (77)
through each
of
the remaining two holes. Tighten all fourtrans-
mission screws.
~
There are outdriveshims (136) included with your
kit. These shims can be used, if necessary, to reduce the
amount
of
end play
in
the differential assembly. Afterthetrans-
mission
is
assembled andthe screws aretightened, checkthe
amountofend playthatthe differential has. Ideally,there should
be abouta businesscard's thicknessworth
of
end play. Ifthere
is
more end playthan that, disassemblethe transmission and
add shims until the end play
is
correct. The differential needs
to bave a little end play. If the differential has no end play the
transmission will bind once it heats
up
from running. 14
Figure 33
Figure 34
BAG
C (Continued)
Fig
35.
Step 42. Glue the brake pad (78) to the brake arm (79)
as
shown. A good cyanoacrylate glue (super glue
TM)
should
be used to hold the pad (78)
in
place. The pad (78) should be
positioned on the arm (79) so thatthe edge ofthe pad (78)
is
flush with the tab on the arm (79) and the pad (78) should be
centered so that it extends over each side of the brake arm
(79) equally. Pressthe pad (78) firmly
in
placewith yourthumb
while the glue sets. The pad (78) should be pressed into
place so that it matches the shape ofthe brake arm (79). The
glue joint should be allowed about 1/2 hourto fully dry before
continuing. Now's a good time to read ahead a little
in
the
manual to familiarize yourselfwith upcoming assemblies.
~
The slipper back plate/brake drum can be used
to hold the brake pad to the brake arm while the glue sets.
This will ensure that the brake pad makes full contact with the
brake drum once assembly
is
complete.
Step 43. After the glue joint has been allowed time to
set,
use a sharp hobby knife
to
carefully trim the edges ofthe
brake pad (78) so that they are flush with the edges of the
brake arm (79).
Fig 36.
Step 44. Slide the brake arm/pad assembly over the
brake arm pin (71) so thatthe brake arm forms
an
arc around
the slipper shaft (60). Secure the brake arm (79) with a 1/8"
'E'-clip
(11).
& IMPORTANT NOTE: The brake arm should be
positioned between the differential outdrive and the top shaft.
Fig
37.
Step
45.
Press a 3/16" x 5/16" bushing
(80)
into the cen-
ter of the spur gear (81) on the side with the three tabs
as
shown. The bushing
(80)
will only go in about half way. Do
not
try
to
force it!
79
Figure 35
Figure
36
81
Figure
37
15
:I
I
BAG C (Continued)
@
Fig
38.
Step 46. Slide the slipper back plate/brake drum
(82)
over the slipper shaft (60), aligning the flat sections on the slipper
shaft (60) with the flat sections
of
the back plate/brake drum (82).
Step 47. Place the slipper pad (83) on the slipper gear plate (84) and align the notches on the gear plate (84) with the
notches on the slipper pad (83).
Step48. Placethe slipper pad (83) and gearplate (84), pad sidefirst, overthe slipper shaft (60) and againstthe back plate/
brake drum (82). Try to get this assembly as close to center on the shaft (60) as possible.
Step 49. Carefully install the
spur
gear (81) with the bushing side out. Lightly rotate the
spur
gear (81) until thethree posts
line upwith thethree holes in the gear plate (84). Snapthe gear (81) into place being careful
to
keep the slipper pad
(83)
aligned
with the gear plate (84).
Step 50. Place the slipper spring
cup
(85), open side out, over the shaft (60) and againstthe spur gear
(81
).
Step 51. Insert one 1/4" x9/16" thrustwasher
(86)
intothe spring cup (85), then the 1/4" x 9/16" thrustbearing (87), followed
bythe second thrust washer (86). All three should be positioned all the
way
in the
cup
(85).
Step 52. Slide the slipper spacer (88), long side first, ontothe shaft (60). The post on the spacer (88) should fit inside the
thrust bearing assembly.
Step 53. Place the gold slipper spring (89) over the shaft (60), followed
by
the spring retaining washer (90), and secure
with the 4-40 lock nut
(5).
& IMPORTANT NOTE: Before tightening the nut, check to see that the slipper pad is properly aligned with the gear
plate. If it is not, correct it before proceeding.
Step 54. Tighten the 4-40 lock
nut
(5)
all the way down, and then back it offone full turn. This is a
good
starting pointfor
adjustment. Final adjustment can be made later.
83
81
85
86
84
87
Figure
38
88
16
BAG D
Fig
39. ®
Step
1.
Locate the forward rear suspension pivot
(91)
(marked with an
"F").
Place the suspension pivot
(91)
on the
chassis
(27)
so that the holes for the hinge pin point
to
the
rear,
and the letter
"F"
is
right-side up. Securethe suspension
pivot with two 4-40 x 3/8" flat head screws (31).
Step
2.
Slide an inner rear hinge pin
(92)
through the
end ofeach ofthe two rear suspension arms [right
(93)
(marked
"L"),
left
(94)
(marked
"R")]
farthest awayfrom theshockmount-
ing holes.
Step
3.
Position thetwo arms (93), (94) as shown sothat
the shock mounting holes are on the
top
side. Insertthe hinge
pins
(92)
into the forward suspension pivot (91). Place the
back rear suspension pivot
(95)
(marked
"R")
behind the sus-
pension arms (93),
(94)
so that the hinge pins (92) fit into the
rear suspension pivot (95), and the letter
"R"
is
right-side up.
Secure the suspension pivot (95) with two 4-40 x3/8"flat head
screws (31).
& IMPORTANT NOTE: The rear suspension arms
are marked backwards. This was not a mistake. The arms
were originally used on another truck
in
the other configura-
tion. The GTX optimizes the location
of
the shocks and en-
hancesthe suspension geometry bymounting the arms
in
the
opposite direction. Be sure that the arm marked
"L"
is
on the
right side and the arm marked
"R"
is
on the left side.
Olilmlilllllilllilllilllilllillllllllllllll!l@
CD
Fig
40.
Step
4.
Slide a 3/8" ball stud
(4)
through the second
hole out, on the bottom row, on each side of the rear shock
tower (96). Secure the ball studs
(4)
with 4-40 lock nuts
(5).
Place a "foam thing" (26) over each ball stud
(4).
& IMPORTANT NOTE: Refer to figure 40 to ensure
that the large hole
in
the rear shock tower
is
to the correct
side.
Step
5.
Slide 4-40 x 3/4" cap head screws
(1)
through
the outside holes
in
the top ofthe shocktower (96). The screws
(1)
should be inserted from the same side asthe ball studs
(4).
Thread a top shock mount bushing
(3)
onto each
of
the two
screws
(1)
and tighten.
3
17
91
27
0 ° 0
' '
I '
' I
I '
i!
~
Figure 39
96
Figure
40
This manual suits for next models
3
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