Arrma RAIDER User manual

3
Downloaded from:
ArrmaForum.com

2WWW.ARRMA-RC.COM
Contents
Warnings - PLEASE READ
It is the parents’ or guardians’
responsibility to ensure minors receive
appropriate guidance when maintaining or tuning this
model. At points this guide may recommend using
tools that are sharp and adhesives. Any such tools,
adhesives or other chemicals are for adult use only. Do
NOT allow minors to use age restricted products such
as solvents or adhesives.
Always ensure that nuts and bolts are properly
fastened and that components are free of damage or
wear before use. Failure to properly maintain your
model may lead to loss of performance, injury to
yourself or others and/or damage to property or your
model.
Upgraded parts may put extra strain on standard
parts. Always ensure that the tyres, wheels and
transmission can handle any increase in power/speed.
Further advice for safely running your model can be
found in the warranty document in your welcome pack
at ARRMA-RC.com/GO
Page
CHASSIS OVERVIEW 3
RECOMMENDED TOOLS 4
BASIC TROUBLE SHOOTING 4
Trouble Shooting Matrix 4
MAINTENANCE 5
Maintenance Schedule 5
Chassis Maintenance 6
Wheel and Tyre Maintenance 6
Slipper Clutch Adjustment 7
Spur/Pinion Mesh 7
Slipper Pad Replacement 8
Driveshaft Maintenance 9
Rear Axle Maintenance 9
Wheel Bearing Replacement 10
FACTORY SETTINGS 11
CHASSIS TUNING 13
Ride Height 13
Camber-Link Length 13
Steering Arm Length 13
Camber-Link Position 13
Shock Position 13
Shock Removal 14
Springs 14
Shock Oil 14
DRIVETRAIN TUNING 15
Gear Chart 15
Spur/Pinion Removal 15
Motor Removal 16
Differential Tuning 16
Differential Removal 17
RADIO-GEAR MAINTENANCE 19
Receiver Access 19
STEERING MAINTENANCE 19
Steering Access 19
Servo Removal 20
Support Info
At ARRMA we want you to love running your kit
and make owning a high performance RC car as simple
as possible. If you have any questions about running,
maintaining, tuning or repairing your ARRMA product,
there are three options for you to get help and advice.
Visit ARRMA-RC.com for support, parts and upgrades
for your kit. ‘GO FOR IT’ is the worldwide owner’s forum
for ARRMA. Here you will find other ARRMA owners,
get help and advice on how to get the best from your
ARRMA product. If you can’t find what you’re looking for,
you can email us at [email protected] 24hrs a
day and we will do our best to help you with your query.
ARRMA-RC.COM
GOFORIT-RC.COM
[e-mail]

3
aEW Chassis Overview
Front Wheel
and Tyre
Front Lower
Wishbone
Steering Rod
Receiver
Box
ESC (Electronic
Speed Controller)
Rear Shock
Absorber and
Spring
Rear
Wishbone
Motor
Wheel-Nut
Wheel-Nut
Axle Axle
Hex Hub
Hex Hub Hinge-pin
Ball-cup
Ball-cup
Rear
Hub Carrier
Hinge-pins
Front
Upright
Steering
Block
Rear Wheel
and Tyre
Camber-link
Driveshaft
Pinion & Spur
Gear Cover
Front Shock
absorber
and Spring
Front Upper
Wishbone
GO FOR IT! is the ARRMA worldwide user community.
Here you will be able to connect with other ARRMA
owners around the world and get access to:
• Tips and tricks of how to get the best from your kit.
• Sneak peaks of upcoming kits and upgrades!
• Readers’ rides where you can show off pictures and
videos of your kit and driving skills!
• Information about upcoming competitions and events!
N.B. VorteX chassis shown as an example - information applies to all variants.
Front Rear

4WWW.ARRMA-RC.COM
Hex Drivers
Not Supplied
Allen Keys
Supplied
Cross wrench
Long Nose Pliers
1.3mm (0.050")
1.5mm
5.5mm
7mm
4mm
2mm
2.5mm
Nut Drivers
Turnbuckle Wrench
Cloth
Automotive
Brake
Cleaner or
Nitro Car
Cleaner
HAZARDOUS/FLAMMABLE:
Adult supervision required, use
only in a well ventilated area and
away from sources of ignition.
Brush Oil
Spray
Grease
Tyre Glue
Thread-lock
Recommended Tools
Basic Trouble Shooting - need help? Visit the support area and forums at ARRMA-RC.COM
Trouble Shooting Matrix
Problem Possible Cause Solution
VEHICLE DOES NOT MOVE Batteries are incorrectly installed in
ARRMA ATX transmitter
Check transmitter batteries and refit - see
model/transmitter manual
Weak, damaged or no drive battery in
model
Install fresh, charged battery
Frayed or broken motor or ESC wires Check condition, reconnect and insulate. Visit
the GO FOR IT! forum for advice
ESC has shut down due to overheating Stop driving and allow ESC or motor to cool
down
MEGA electric motor is damaged Replace with new unit - visit ARRMA-RC.com
for advice and upgrades!
MEGA waterproof ESC is damaged Replace with new unit - visit ARRMA-RC.com
for advice and upgrades!
Possible damage to transmission/drive-
line
Check components and replace - visit ARRMA-
RC.com for advice
ESC low voltage cutoff has activated to
protect batteries
Remove drive battery, leave to cool down if
necessary, and re-charge
VEHICLE DOES NOT
REVERSE
ESC reverse mode switched off Adjust reverse on MEGA waterproof ESC
MEGA Waterproof ESC is damaged Replace with new unit - visit ARRMA-RC.com
for advice and upgrades!
VEHICLE DRIVES WITHOUT
INPUT
ARRMA ATX transmitter throttle trim
incorrectly set
Throttle trim needs to be set to zero/neutral -
see model/transmitter manual
Neutral throttle position of MEGA ESC
incorrect.
Set throttle trim to zero and switch MEGA ESC
off and then on again, a chime to indicate the
new neutral position has been set
SHORT RUNTIME Battery damaged or not fully charged Check condition, replace or recharge
MEGA Electric motor dirty or damaged Clean, check condition and/or replace - visit
ARRMA-RC.com for more information
Incorrect ESC battery mode - voltage
cutoff too high for the battery you are
using
Adjust the battery mode of the MEGA
waterproof ESC
SLUGGISH PERFORMANCE Battery damaged or not fully charged Check condition, replace or recharge
ARRMA ATX transmitter throttle trim
incorrectly set
Throttle trim needs to be set to zero/neutral -
see model/transmitter manual
Neutral throttle position of MEGA ESC
incorrect.
Set throttle trim to zero and switch MEGA ESC
off and then on again, a chime to indicate the
new neutral position has been set
1.3 (0.050"), 1.5, 2 and 2.5mm

5
Trouble Shooting Matrix (cont.)
Maintenance Schedule
Problem Possible Cause Solution
SLUGGISH PERFORMANCE
(continued)
Slipper clutch adjustment too loose Check slipper is set to factory setting or your
prefered setting - see page 7 or model manual
Initial acceleration mode or reverse speed
on MEGA waterproof ESC set too low
Modify MEGA waterproof ESC settings
MEGA electric motor dirty or damaged Clean, check condition and/or replace - visit
ARRMA-RC.com for more information
Drivetrain dirty or damaged Clean, check condition and/or replace - visit
ARRMA-RC.com for more information
FRONT WHEELS LIFT WHEN
ACCELERATING
Slipper clutch adjustment too tight Check slipper is set to factory setting - see
page 7 or model manual
NO CONTROL OF VEHICLE
OR SHORT RANGE
ARRMA ATX transmitter batteries are
weak or fitted incorrectly
Check transmitter batteries and refit - see
model/transmitter manual
Servo and ESC signal wires to ARX
receiver loose or connected incorrectly
Reinstall signal wires to receiver
ARRMA transmitter and receiver are not
'bound' correctly
Transmitter and receiver need to be bound -
see model/transmitter manual
STEERING/THROTTLE
OPERATION INTERMITTENT
ESC has shut down due to overheating Stop driving and allow ESC or motor to cool
down
ARRMA transmitter and receiver are not
bound fully or are suffering interference
Check for sources of interference and re-bind
transmitter/receiver - see transmitter manual
VEHICLE WANDERS LEFT/
RIGHT WITHOUT STEERING
INPUT
ARRMA ATX Steering trim setting out Adjust steering trim - see model/transmitter
manual
Damaged steering components C h e c k co m p o n e n t s a n d r e p l a c e - v i s i t
ARRMA-RC.com for advice
Drivetrain dirty or damaged Clean, check condition and/or replace - visit
ARRMA-RC.com for more information
STEERING OR THROTTLE
FUNCTION REVERSED
Relevant channel of ARRMA ATX
transmitter is reversed
Reverse relevant channel on ARRMA ATX
transmitter - see model/transmitter manual
Check that the wires from the ESC to the
motor are connected correctly
Reconnect in the correct orientation (orange
to red and blue to black) ensuring fit is tight; if
not pinch female connector with pliers
LIMITED STEERING ANGLE ARRMA ATX transmitter steering dual-
rate set incorrectly
Adjust ARRMA ATX transmitter dual-rate -
see transmitter manual
Damaged steering components C h e c k co m p o n e n t s a n d r e p l a c e - v i s i t
ARRMA-RC.com for advice
MEGA waterproof ESC is damaged Replace with new unit - visit ARRMA-RC.com
for advice and upgrades!
Maintenance
This chart is just a guide. Running in dusty, sandy or wet conditions will mean
certain maintenance tasks will need to be performed more frequently. Check for wear or damage after every run. Do not
wait until the recommended time for maintenance if parts appear badly worn or need renewing.
Maintenance Task Page Runs
Chassis Maintenance 6
Wheel and Tyre Maintenance 6
Slipper clutch Adjustment 7
Spur/Pinion Mesh Adjustment 7
Slipper Pad Replacement 8
Driveshaft Maintenance 9
Rear Axle Maintenance 9
Wheel Bearing Replacement 10
Shock Oil Replacement 14
Differential Oil Replacement 16

6WWW.ARRMA-RC.COM
Chassis Maintenance
AFTER RUNNING:
• Clean the car, paying special attention to the
areas on the right
• Ensure that drivetrain, suspension and
steering are clean, free and lubricated
• Check that all the screws are tight
• Check tyre/wheel condition
Tools Required
Tools Required
N.B. Raider chassis shown as an example - information applies to all variants.
N.B. Fury shown as an example - information applies to all variants.
DO NOT RUN THE CAR IF ANY
PARTS ARE DAMAGED
Please contact your local distributor
to order replacement parts.
Online videos when
you see this icon >>
Automotive
Brake
Cleaner or
Nitro Car
Cleaner
Cloth Brush
Wheel and Tyre Maintenance
2
3 4
1
Visually inspect the tyre sidewalls and tread
for damage or heavy wear. Replace wheel
and tyre if either is found to be worn. Check
that tyre bead is securely glued to the rim.
If the tyre needs re-glueing, gently pull tyre away
from the wheel rim, apply a small amount of tyre
glue, re-seat the tyre and hold until glue has set.
Refit the wheel with a 7mm nut driver or cross wrench 'finger-tight',
then tighten a further 1/4 turn. Do NOT over tighten the wheel nut or
damage to the wheel bearings may occur.
Ensure model is switched off and drive
battery is removed; then remove wheel with
7mm nut driver or crosswrench.
7mm Nut Driver
or
Cross Wrench
Tyre Glue
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7
The function of the slipper clutch is
to protect the gearbox, differential and motor from shocks
and also to allow you to tune how the torque from the motor
'comes-in' when you accelerate to suit different surface
conditions. To adjust the slipper clutch do the following:
Ensure model is switched off and drive battery is
removed then remove rear-right wheel with 7mm nut
driver or crosswrench.
Remove spur gear cover with 2mm hex driver.
Hold spur gear with fingers. Use a 5.5mm nut
driver or crosswrench to loosen or tighten
slipper nut a 1/4 of a turn at a time. Refit spur
gear cover and rear-right wheel.
Slipper Clutch Adjustment
WARNING: A loose slipper will damage the friction pads. If
the slipper is too tight it may damage the transmission.
AFTER RUNNING:
If slipper clutch is too loose, tighten 1/4 turn.
Tools Required
Surface
Type Slipper Clutch Characteristics
Slippery Loosen Smoother power delivery, easier to control.
High Grip Tighten Quicker throttle response. If the car wheelies too much,
loosen the Slipper Clutch
Factory Setting
1. Fully tighten locknut clockwise.
2. Loosen 5 full turns.
2mm Hex Driver
2
1
Spur/Pinion Mesh Adjustment
Ensure model is switched off and
drive battery is removed then remove
rear-right wheel with 7mm nut driver
or cross-wrench. Remove spur gear
cover with 2mm hex driver.
Check the gears run
smoothly and that there
are no tight spots and
the gears mesh as
shown above.
To set the gear mesh, undo the
two motor screws with a 2mm
hex driver then place a strip of
printer paper between the gears, press
on the pinion and re-tighten the motor
screws. Remove paper, refit the spur
gear cover and rear wheel.
1 2 3
Gear mesh should not need to be
adjusted regularly, however it is worth checking every 10
runs or so that the gears are still correctly meshed to
prevent damage to the spur gear.
If the spur and/or pinion gear need to be replaced please see page 15 for removal and replacement.
Tools Required
2mm Hex Driver 5.5 & 7mm Nut Driver or Cross Wrench
5.5 & 7mm Nut Driver or Cross Wrench
ARRMA-RC.COM/
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SUPPOR T/

8WWW.ARRMA-RC.COM
Slipper Pad Replacement
Tools Required
2mm Hex Driver 5.5 & 7mm Nut Driver or Cross Wrench
Every 20 runs or so it may be
necessary to replace your slipper clutch 'pads'. This depends
on how the slipper is setup and your driving style. If you find
that it is hard to get the setting you want from your slipper
clutch then it is likely that the pads need to be replaced.
Ensure model is switched off and drive battery is
removed then remove rear-right wheel with 7mm
nut driver or cross-wrench.
Remove spur gear cover with 2mm hex driver.
Hold the spur gear with your fingers. Use
a 5.5mm nut driver or cross-wrench to
remove the slipper clutch adjustment nut.
Loosen the adjustment nut 5
turns. Refit spur gear cover
and rear wheel.
2
6
5
3 4
1
Remove the slipper clutch adjustment mechanism, slipper plates and
spur gear. Remove old slipper pads from spur gear and discard. Affix the new slipper pads to the spur gear.
Slipper
Pads
PN:
310018
Refit the slipper clutch & adjustment mechanism.
Tighten the adjustment nut fully.
ARRMA-RC.COM/
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9
Driveshaft Maintenance
Rear Axle Maintenance
Tools Required
7mm Nut Driver or Cross Wrench Long-nose Pliers
Every 20 runs or so it may
be necessary to clean and re-grease the drive-
shafts as well as check for wear and/or damage.
Running in dusty, sandy or wet conditions will mean
that this will need to be performed more frequently.
2
2
4
1
3
Remove rear wheel with 7mm nut-driver/cross
wrench. Separate camber-link from balljoint with pliers.
Visually check driveshaft is not twisted or bent. If
necessary, replace. Re-grease driveshaft ends and refit.
Remove driveshaft. Clean driveshaft ends and axle
inputs and differential out-drives.
Separate camber-link from ball joint with long-nose pliers.
Refit camber-link ball-joint with long nose
pliers and refit rear wheel with 7mm nut
driver or cross wrench.
Cloth Grease
Every 20 runs or so it may
be necessary to inspect the rear axle for wear. Running the
model in dusty, sandy or wet conditions will mean that this will
need to be performed more frequently.
Tools Required
7mm Nut Driver or Cross Wrench Long-nose Pliers
1
Remove rear wheel with 7mm nut driver/cross wrench.
Remove rear hex hub and drive pin from axle.
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10 WWW.ARRMA-RC.COM
Wheel Bearing Replacement
Rear Axle Maintenance (cont.)
4 5
Clean and check condition
of rear axle. If worn as
shown above, replace axle.
Refit driveshaft, camber-link, drive
pin, rear hex hub and rear wheel.
Rotate rear hub carrier to
allow better access and push
axle up through bearings.
3
Tools Required
7mm Nut Driver or Cross Wrench Long-nose Pliers
Ev er y 50 runs or so it may be
necessary to inspect the wheel bearings for wear. Running
the model in dusty, sandy or wet conditions will mean that
this will need to be performed more frequently.
2
4
7
1
3 5
8
6
Remove front and rear wheels with 7mm nut driver/cross wrench.
Remove hex hub and drive pin from axles.
Turn steering and push axle
through front bearings.
Refit front axles, hex hubs,
drive pins and front wheels.
Refit rear axle, camber-link
balljoint, rear hex hubs, drive
pins and rear wheels.
Rotate rear hub carrier and
push axle through bearings.
Remove bearings from steering block.
Inspect, clean and replace if necessary.
Remove bearings from hub carrier.
Inspect, clean and replace if necessary.
Separate rear camber-link from ball joint
with long-nose pliers.
N.B. Fury shown as an example - information applies to all variants.
ARRMA-RC.COM/
SUPPORT/

11
ESC
Factory Settings
Factory Settings
Factory Settings
Front
Front
Front
Shocks
Differential
Motor/Gears
Rear
Rear
Rear
Ride Height
Ride Height
Ride Height
Ride Height
Ride Height
Ride Height
Piston
Front Rear
Oil wt.
Spring
Motor Spur Gear
Pinion Gear
Oil wt.
Camber
Camber
Camber
Camber
Camber
Camber
Toe Angle
Toe Angle
Toe Angle
mm
mm
mm
mm
mm
mm
°
°
°
°
°
°
°
°
°
Lower shock
position
Lower shock
position
Lower shock position
Lower shock position
Lower shock position
44mm
21.5mm
21.5mm
26mm 1.5mm
1.5mm
26mm
Camber Link
position
Camber Link
position
Camber Link
position
21.5
21.5
21.5
22
22
22
-1.5
-1.5
-1.5
Kit - 2 x 1.3mm
Kit - Chrome
Kit - 15 Turn Kit - 81 tooth
Kit - 22 tooth
Kit - MEGA
Kit - Chrome
350 cst 350 cst
70000 cst
Kit - 2 x 1.3mm
-1.5
-1.5
-1.5
0 (Zero)
0 (Zero)
0 (Zero)
Lower shock position
41.5mm
0.75mm
ESC
Shocks
Differential
Motor/Gears
Piston
Front Rear
Oil wt.
Spring
Motor Spur Gear
Pinion Gear
Oil wt.
Kit - 2 x 1.3mm
Kit - Chrome
Kit - 15 Turn Kit - 81 tooth
Kit - 22 tooth
Kit - MEGA
Kit - Chrome
350 cst 350 cst
70000 cst
Kit - 2 x 1.3mm
ESC
Shocks
Differential
Motor/Gears
Piston
Front Rear
Oil wt.
Spring
Motor Spur Gear
Pinion Gear
Oil wt.
Kit - 2 x 1.3mm
Kit - Chrome
Kit - 15 Turn Kit - 87 tooth
Kit - 18 tooth
Kit - MEGA
Kit - Chrome
350 cst 350 cst
70000 cst
Kit - 2 x 1.3mm

12 WWW.ARRMA-RC.COM
Factory Settings
Factory Settings
Factory Settings
Front
Front
Front
Rear
Rear
Rear
Ride Height
Ride Height
Ride Height
Ride Height
Ride Height
Ride Height
Camber
Camber
Camber
Camber
Camber
Camber
Toe Angle
Toe Angle
Toe Angle
mm
mm
mm
mm
mm
mm
°
°
°
°
°
°
°
°
°
21.5
21.5
21.5
22
22
22
-1.5
-1.5
-1.5
-1.5
-1.5
-1.5
0 (Zero)
0 (Zero)
0 (Zero)
Lower shock position
44mm
Camber Link
position
Lower shock position
41.5mm
Lower shock position
44mm
Camber Link
position
Lower shock position
41.5mm
Lower shock position
44mm
Camber Link
position
Lower shock position
41.5mm
0.75mm
0.75mm
0.75mm
ESC
Shocks
Differential
Motor/Gears
Piston
Front Rear
Oil wt.
Spring
Motor Spur Gear
Pinion Gear
Oil wt.
Kit - 2 x 1.3mm
Kit - Chrome
Kit - 15 Turn Kit - 87 tooth
Kit - 18 tooth
Kit - MEGA
Kit - Chrome
350 cst 350 cst
70000 cst
Kit - 2 x 1.3mm
ESC
Shocks
Differential
Motor/Gears
Piston
Front Rear
Oil wt.
Spring
Motor Spur Gear
Pinion Gear
Oil wt.
Kit - 2 x 1.3mm
Kit - Chrome
Kit - 15 Turn Kit - 87 tooth
Kit - 18 tooth
Kit - MEGA
Kit - Chrome
350 cst 350 cst
70000 cst
Kit - 2 x 1.3mm
ESC
Shocks
Differential
Motor/Gears
Piston
Front Rear
Oil wt.
Spring
Motor Spur Gear
Pinion Gear
Oil wt.
Kit - 2 x 1.3mm
Kit - Chrome
Kit - 15 Turn Kit - 87 tooth
Kit - 18 tooth
Kit - MEGA
Kit - Chrome
350 cst 350 cst
70000 cst
Kit - 2 x 1.3mm

13
The ride height is set using preload
spacers between the top of the shock
and the top of the suspension springs.
These plastic clips are included in the
kit in 1mm, 3mm and 7mm versions.
Raising the ride height not only gives
you greater ground clearance when
running on more uneven surfaces but
it can also affect the chassis balance
of the car. Experiment by raising the
height of the front and rear at the
same time or independently and see
how it affects the handling of your car.
The camber links are the arms that link the top of hubs to the chassis. The
length can be adjusted to alter the camber of the front and rear wheels.
The adjustments and their effects are listed below:
The steering arm links are the connection between the front hubs and
the steering mechanism in the chassis. The length of these can adjust the
front toe-in/-out.
Adjusting the toe can create either toe-in, which is where the wheels point
inwards towards a centreline in front of the vehicle, or toe-out where the
wheels point towards a centreline behind the vehicle. The effect of these
adjustments is below:
Ride Height Ride Height
Chassis Tuning
Ride Height
Camber Link Length
Steering Arm Length (Toe-In/Out)
Length Characteristic
Front Shorter More negative camber, more stability, smoother
steering, slower response.
Longer Less negative camber, more direct steering, quicker
response.
Rear Shorter More negative camber, less forward traction, smoother
cornering, use for high grip surfaces.
Longer Less negative camber, more forward traction, less
smooth cornering, good for low grip surfaces.
Length Characteristic
Standard Zero toe, standard setting, neutral handling.
Shorter Toe-Out, increasing cornering abilty, less stability on straights.
Longer Toe-In, more stability on straights.
1mm
3mm
7mm
Shock Position
The shock mounting position is where the bottom of the shock
mounts to the lower wishbone of the suspension.
Adjusting the angle of the shock can change the way the
suspension reacts to bumps and also cornering forces.
The effect of these adjustments is below:
Angle Characteristic
Inner position Softer damping, better over bumps, slower response,
more overall grip.
Outer postion Stiffer damping, better on smooth surfaces, faster re-
sponse, slightly less grip.
The camber links are the arms that link the top of hubs to the
chassis. The length can be adjusted to alter the camber of the front
and rear wheels.
The adjustments and their effects are listed below:
Camber Link Position
Position Characteristic
Inner Standard position, Less chassis roll, lower overall grip,
quicker to respond to inputs.
Outer (Adjust camber link turbuckle to return camber to correct
angle) More chassis roll, more overall grip, slower to
respond to inputs.
N.B. Raider shown as an example - information applies to all variants.

14 WWW.ARRMA-RC.COM
Shock Oil
Shock Removal
How to change your shock oil
The standard shock oil in your kit’s shocks is
intended to provide forgiving, fun handling and
allow the shocks to soak-up any punishment you
choose to give them.
Changing the oil within the shock absorber
can significantly change the handling and
performance of the car.
Hold the shock
body carefully in
a pair of pliers,
place an allen
key through
the shock cap
and turn anti-
clockwise to
loosen.
Remove the cap
and turn the
shock upside
down over a
cloth and push
the piston to
remove the
shock oil. Leave
to drain.
Stand the
shock upright
and extend the
shaft fully. Fill
the shock body
to the top with
the new oil and
leave for a few
minutes to settle.
Carefully screw
the cap back
onto the shock
body and tighten
c l o c k w i s e
until the seals
compress. Clean
up any excess
oil.
1. 2. 3. 4.
Weight Characteristic
Thinner Softer damping
(lower CST) More traction
Quicker chassis weight transfer
Car reacts more quickly
More chassis roll
More chance of 'bottoming out'
Heavier Stiffer damping
(higher CST) Slower chassis weight transfer
Car slower to react
Less chassis roll
Less chance of 'bottoming out'
Tools Required
2mm Hex Driver 5.5 & 7mm Nut Driver or Cross Wrench
Ev er y 5 0 r uns or so it ma y be
necessary to change the shock oil because over time it will
become thinner meaning kit handling could be affected. You
can also use this as an opportunity to upgrade the springs
or shock oil.
Front Rear
Remove lower shock bolt with 2mm hex driver.
Remove upper shock nut with 5.5 nut driver or cross-
wrench. Remove shock absorber.
Remove lower shock bolt with 2mm hex driver.
Remove upper shock nut with 5.5 nut driver or cross-
wrench. Remove shock absorber.
Springs
Your kit’s standard springs are quite soft to give
the best compromise between handling and performance.
Swapping the springs for either softer or stiffer springs can alter
the handling characteristic of the car significantly. To change the
springs remove the lower spring support and slide the spring
over the shock body.
To find out what spring options there are for your kit please visit
ARRMA-RC.com or speak to your local distributor.
Strength Characteristic
Softer More traction
More chassis roll
More chance of 'bottoming out'
Better on bumpy surfaces
Stiffer Less traction
Car quicker to react
Less chassis roll
Less chance of 'bottoming out'
Better on smooth surfaces
ARRMA-RC.COM/
SUPPORT/

15
Spur/Pinion Gear Removal and Replacement
Gear Chart
Your ARRMA kit has one gear ratio and this can be altered by changing the pinion or spur gear in the
transmission. The standard gearing of your kit is designed to give the best compromise between speed and acceleration. Increasing the
top speed will reduce acceleration and vice versa. Too low or high a gear will put strain on the motor/ESC, and potentially damage them.
The numbers shown in chart is the number of times the spur gear is larger than the pinion, or the ‘gear ratio’. Essentially this is number
of rotations the motor/pinion gear has to rotate the larger spur gear once. The lower the ‘gear ratio’ the greater the potential top speed,
the higher the ‘gear ratio’ the greater the potential acceleration.
Upgraded motors/ESCs and non-standard wheels may require different gear ratios. Try to find the best balance between speed/
acceleration and handling/performance. For help selecting the correct gear ratio for your upgrades visit the GO FOR IT forums at
GOFORIT-RC.com.
Once you replaced the pinion or spur gear ensure you have set the gear mesh correctly - see page 7 for details.
Standard Gear Ratios *1 = Raider/ADX-10 *2 = Fury/Mojave/Granite/Vortex
Drivetrain Tuning
Pinion Gear 15T 16T 17T 18T 19T 20T 21T 22T 23T 24T 25T 26T 27T 28T 29T 30T
Spur Gear 81T (tooth) X X X 4.5 4.26 4.05 3.86 3.68*¹ 3.52 3.38 3.24 3.12 3 2.89 2.79 2.7
87T 5.8 5.44 5.12 4.83*² 4.58 4.35 4.14 3.95 3.78 3.63 X X X X X X
Tools Required
or
Cross Wrench
5.5 & 7mm Nut Driver
1.5 & 2mm Hex Drivers
1
Pinion Gear Removal
2
Spur Gear Removal
Remove rear right wheel with 7mm
nut driver/cross wrench.
Loosen motor bolts with 2mm hex driver and
loosen pinion gear grub screw with 1.5mm hex
driver. Remove pinion. Fit new pinion and set gear
mesh (page 7). Refit spur gear cover and wheel.
Remove spur gear cover with 2mm
hex driver
Loosen motor bolts with 2mm hex driver. Undo
slipper nut with 5.5mm nut driver or cross-
wrench. Remove slipper clutch mechanism and
spur gear. Fit new spur gear, set gear mesh and
adjust slipper (page 7). Refit spur cover and wheel.
Slipper
Pads
PN:
310018
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Differential Tuning
Motor Removal
When turning a corner the inside wheel travels
a shorter distance than the outside wheel. A
differential allows the wheels to turn at different
speeds and take a corner more quickly.
Without a differential, on a high grip surface, the
inside wheel will lose traction and cause you to
spin-out. This effect is less noticeable on loose
surfaces, however a well setup differential will
make the car easier to drive and give more
predictable handling at speed.
The differential is filled with silicone oil and the
thickness of this alters the operation of the
differential unit. As standard, your differential
is designed to provide safe, fun handling -
for advice on which oil to use please visit the
forums at GOFORIT-RC.com
Removing the motor is useful for
cleaning the motor and also if choosing to upgrade to either a
different specification brushed motor or the awesome power of
an ARRMA GIGA brushless system!
To see what motor upgrades are available for your car please
visit ARRMA-RC.com or your local ARRMA distributor.
Oil Weight Characteristic
Thinner (Lower CST) Looser differential action
Less stable under braking (into corners)
Faster steering into corner
More steering in corner
Greater chance of oversteer
More chance of wheelspin
Less forward drive out of corner (in low grip conditions)
Generally better for low traction surfaces
Thicker (Higher CST) Tighter differential action
More stable braking (into corner)
Slower steering into corner
Less steering in corner
Greater chance of understeer
Less chance of wheelspin
More forward drive out of corner
Generally better for high traction surfaces
Tools Required
2mm Hex Driver 7mm Nut Driver or Cross Wrench
1
3
2
4
Remove rear right wheel with 7mm nut driver/
cross wrench.
Remove motor bolts with 2mm hex driver. Loosen
pinion gear grub screw with 1.5mm hex driver and
remove. Remove motor andt clean if necessary.
Remove spur gear cover with 2mm hex driver
and disconnect motor wires.
Fit new electric motor (if required), fit pinion gear
to motor then set gear mesh (page 7). Replace
spur gear cover and rear wheel.
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17
Differential Removal and Replacement
1
3
5
2
4
6
Remove rear wheels with 7mm nut driver/cross
wrench. Disconnect motor wires.
Remove driveshafts on both sides. Use this
opportunity to inspect axles and driveshafts for
wear (Page 9).
Remove two rear shock tower screws and two
motor guard screws with 2mm hex driver.
Separate both rear camber-link ball joints with long-
nose pliers.
Remove long motor guard bolt with 2.5mm hex driver.
Remove two short motor guard bolts and four gearbox/
chassis bolts with 2mm hex driver.
Hinge motor guard up and remove gearbox.
Long-nose Pliers
Tools Required
2mm Hex Driver1.3mm Hex Driver 2.5mm Hex Driver 7mm Nut Driver or Cross Wrench
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Differential Removal and Replacement (cont.)
7
109
Differential Exploded View
8
11
Undo seven screws holding gearbox halves together.
Notice that one screw is longer than the others.
Remove top half of differential case,
turn lower case upside down over a
cloth and allow old silicone oil to drain.
Remove four screws holding
differential together with
1.3mm (0.050”) hex driver.
Refill differential with silicone oil to
the level shown. Reinstallation is
the reverse the removal process.
Maintenance kits available:
Differential Bearings - 610001
Differential Gear/Idler Gear Set - 310003
Differential Output Shafts - 310008
Differential Gear Maintenance Set - 310009
Remove differential unit from gearbox.

19
Radio-gear Maintenance
Steering Maintenance
Receiver Access
Steering Access
If you want to replace or upgrade the steering servo, ESC
(electronic speed controller) or re-bind the transmitter, you
will need to access the receiver.
I f y o u f i n d y o u r c a r ’ s
steering feels loose it may mean you have to
adjust the servo saver. To do this you will have
to get access to the steering mechanism.
2mm Hex Driver
1
1
2
2
(Raider only) Remove four roof bolts with 2mm
hex driver, remove roof.
Disconnect steering link ball-joints on both sides with
long nose pliers.
Remove three bolts securing receiver box lid
with 2mm hex key, remove lid. Reinstallation is
the reverse the removal process.
Remove four button screws above and four
countersunk screws below servo box with 2mm
hex driver.
Tools Required
2mm Hex Driver 7mm Nut Driver or Cross Wrench Long-nose Pliers
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SUPPOR T/
Tools Required
34
Separate front sub assembly from rest
of chassis.
Remove two screws holding steering assembly
in the servo box with a 2mm hex driver.

20 WWW.ARRMA-RC.COM
Servo Removal
4mm
56
Disconnect servo arm ball-joint and remove steering
assembly from servo box.
Inspect servo saver, ensuring that it is set to the
factory setting above. Set with 7mm hex driver.
Reassembly is the reverse the removal process.
Steering Access (cont.)
Tools Required 2mm Hex Driver Upgrading your servo will give quicker
and more powerful steering.
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12
Access the receiver (page 19); unplug the steering servo
wire (CH1) and remove the wire from the receiver box.
Follow the steps in ‘Steering Access’ section
- (page 19) and remove the front subassembly
and steering mechanism.
Steering
(CH1)
Throttle
(CH2)
3
Remove six screws holding servo box to chassis
with 2mm hex driver and separate.
4
Remove four screws holding servo box halves
together with 2mm hex driver and separate.