Quadratec 16400.0010 User manual

Quadratec® 1.75”
Coil Suspension Lift Kit
TO REDUCE RISK OF SERIOUS INJURY OR PROPERTY DAMAGE:
READ ALL SAFETY MESSAGES AND UNDERSTAND ALL
INSTRUCTIONS AND PROCEDURE NOTICES BEFORE ATTEMPTING
TO INSTALL OR USE THIS PRODUCT. FOLLOW ALL INSTRUCTIONS
AND WARNINGS WITH PRODUCT & VEHICLE OWNERS MANUAL.
THIS KIT INCLUDES A COCKPIT SAFETY WARNING STICKER
REGARDING INCREASED ROLLOVER RISK. THIS STICKER
MUST BE AFFIXED IN THE COCKPIT, VISIBLE TO ALL VEHICLE
OCCUPANTS AT ALL TIMES.
RISK OF EYE INJURY! SAFETY GLASSES MUST BE WORN AT ALL
TIMES WHILE INSTALLING OR MAINTAINING THIS PRODUCT.
TORQUE AND RECHECK FASTENERS AFTER 250 MILES AND
FREQUENTLY THEREAFTER. DO NOT USE IF DAMAGED.
Installation Manual: for 2018 - Current Wrangler (JL) #16400.0010
PARTS LIST:
Front Coil Spacers - QTY 2
Rear Coil Spacers - QTY 2
Front Swaybar Links - QTY 2
Front Bump Stops - QTY 2
Rear Bump Stops - QTY 2
Front Shock Brackets - QTY 2
Rear Shock Brackets - QTY 2
Full Kit Component & Hardware Listed Inside Booklet
Cockpit Warning Sticker - QTY 1
QJL_1.75_LIFT_16400_0010_LTR.indd 1QJL_1.75_LIFT_16400_0010_LTR.indd 1 9/11/20 1:27 PM9/11/20 1:27 PM

INSTALLATION OF THIS PRODUCT ON YOUR JEEP®WILL MODIFY AND
ENHANCE ITS SUSPENSION AND OFF-ROAD PERFORMANCE. IT MAY HANDLE
DIFFERENTLY THAN AS FACTORY-EQUIPPED INCLUDING; INCREASED
RIDE-HEIGHT; REDUCED LATERAL STABILITY; AND HIGHER RISK OF
ROLL-OVER OR OTHER ACCIDENT. ALSO, OWNER’S CHOICE OF LARGER
TIRE/WHEEL COMBINATIONS MAY REQUIRE ADDITIONAL PEDAL PRESSURE
OR INCREASED DISTANCE TO STOP; CAUSE SPEEDOMETER TO READ SLOW
AND MAY REDUCE VISIBILITY AROUND THE VEHICLE. CHOICE OF
TIRE/WHEEL COMBINATIONS OTHER THAN AS TESTED OR RECOMMENDED
MAY COMPROMISE FMVSS 126 COMPATIBILITY.
FAMILIARIZE YOURSELF WITH VEHICLE HANDLING AND REVIEW ALL
VEHICLE MANUFACTURERS AND QUADRATEC®WARNINGS, INSTRUCTIONS
AND LIMITED WARRANTIES BEFORE DRIVING A MODIFIED SUSPENSION
JEEP®. FOLLOW ALL RECOMMENDED MAINTENANCE PROCEDURES AND
ROUTINELY INSPECT YOUR VEHICLE COMPONENTS FOR UNUSUAL WEAR
OR OFF-ROAD DAMAGE.
DO NOT DRIVE UNDER ANY SPEED OR MANEUVERING CONDITIONS WHICH
MAY CAUSE THE VEHICLE TO TRIP, ROLL, LOSE TRACTION OR COMPROMISE
YOUR ABILITY TO SAFELY BRAKE IN AN EMERGENCY. QUADRATEC®DOES
NOT RECOMMEND COMBINED USE OF SUSPENSION KITS, BODY LIFTS,
OTHER LIFTING DEVICES OR COMPONENTS ALTERING THE INTENDED
RIDE-HEIGHT OR FUNCTION OF ITS PRODUCTS. MANY STATES HAVE LAWS
RESTRICTING THE EXTENT OF VEHICLE MODIFICATIONS. OWNER/DRIVER IS
RESPONSIBLE FOR MODIFICATIONS CONSISTENT WITH STATE LAWS AND
GOOD SENSE.
2
Before You Begin Installation:
Congratulations on your purchase of the
Quadratec 1.75” Coil Spacer Lift Kit for
018-Current JL Wrangler Vehicles.
When unpacking, check to make sure all
parts are included and not damaged due
to shipping. If any part is missing or
broken, please call Customer Service
at 800-745-6037 as soon as possible.
IMPORTANT PRODUCT SAFETY TIPS
A Few Words About Product Safety:
Your Quadratec Suspension product
is intended to enhance the utility and
enjoyment of your off road capable
vehicle. Following safety information
and installation recommendations.
Throughout these instructions
important safety information is
generally preceded by one of three
signal words indicating the relative risk
of injury, property damage or adverse
consequence. The signal words mean:
a hazardous situation which, if not avoided, could result in death or
serious injury. You CAN be KILLED or SERIOUSLY HURT if you
don’t follow instructions.
a hazardous situation which, if not avoided, could result in minor or
moderate injury. You CAN be moderately HURT and also may suffer
property damage if you don’t follow instructions.
Careful attention is required to this instruction or operation but does
generally not relate to personal injury. Damage to your Quadratec®
product or other property may result if you don’t follow instructions.
QJL_1.75_LIFT_16400_0010_LTR.indd 2QJL_1.75_LIFT_16400_0010_LTR.indd 2 9/11/20 1:27 PM9/11/20 1:27 PM

1.75” COIL SPACER KIT PARTS LIST:
Front Coil Spacer - QTY 2
Rear Coil Spacer - QTY 2
Cockpit Warning Sticker - QTY 1
Front Sway Bar Link - QTY 2
1⁄2" - 13 x 3 Hex Head Bolt - QTY 2
1⁄2" - 13 Lock Nut - QTY 2
7⁄16” USS Flat Washer - QTY 3
Hourglass Bushing - QTY 4
Sleeve - QTY 4
Front Bump Stop 2” Tall - QTY 2
3⁄8”- 16 x 2.5” Hex Head Bolt - QTY 2
3⁄8” SAE Flat Washer - QTY 2
3⁄8” Flange Nut - QTY 2
Front Shock Brackets - QTY 2
1⁄2”- 13 x 3.5” Hex Head Bolt - QTY 2
7⁄16” USS Flat Washer - QTY 6
1⁄2”- 13 Lock Nut - QTY 2
1.50”Spacer - QTY 2
M8 x 1.25 x 30 Flange Head Bolt - QTY 2
M8 Flange Lock Nut - QTY 2
Rear Bump Stop 2” Tall - QTY 2
3⁄8”- 16 x 3" Hex Flat Head Screw - QTY 4
3⁄8” Flange Nut - QTY 4
Rear Shock Brackets - QTY 2
1⁄2”- 13 x 3.5” Hex Head Bolt - QTY 2
7⁄16” USS Flat Washer - QTY 6
1⁄2”- 13 Lock Nut - QTY 2
1.50”Spacer - QTY 2
M8 x 1.25 x 30 Flange Head Bolt - QTY 2
M8 Fender Washer - QTY 2
M8 Flange Lock Nut - QTY 2
REQUIRED TOOLS:
Safety Glasses
5.5mm, 6mm Hex Key Wrench
10, 12, 15, 16, 17, 18, 21, 24mm Sockets
9⁄16”, 3⁄4” Sockets
1⁄2”, 9⁄16”, 5⁄8”, 3⁄4” Open End Wrench
Locking Pliers (I.E. Vise Grips)
Diagonal Wire Cutters
Torque Wrench
3
IMPORTANT PRODUCT SAFETY TIPS
ALWAYS SUPPORT FRAME RAILS USING JACK STANDS.
QUADRATEC®RECOMMENDS PROFESSIONAL INSTALLATION
OF THIS PRODUCT.
QJL_1.75_LIFT_16400_0010_LTR.indd 3QJL_1.75_LIFT_16400_0010_LTR.indd 3 9/11/20 1:27 PM9/11/20 1:27 PM

4
PARK THE VEHICLE ON FLAT, LEVEL GROUND AND SET EMERGENCY BRAK
E. ALWAYS SUPPORT FRAME RAILS USING JACK STANDS.
1.75” Coil Spacer Lift Kit Installation: Front
Caution: Park the vehicle on at, level
ground and set emergency brake. Put
on safety glasses. Raise the front of the
vehicle and support frame rails using
jack stands. Do not lower the axle at
this time. Remove front wheels/tires.
Loosen the front track bar at both the
frame and axle using a 21mm socket
and wrench. (FIGs 1 & 2) Remove bolt
from the axle end and save hardware.
Remove the upper control arm bushing
heat shields on the frame using a 10mm
socket and or wrench. (FIGs 3 & 4)
FIG1 FIG2
FIG3 FIG4
QJL_1.75_LIFT_16400_0010_LTR.indd 4QJL_1.75_LIFT_16400_0010_LTR.indd 4 9/11/20 1:28 PM9/11/20 1:28 PM

5
Disconnect the front sway bar end links
at the axle using a 18mm socket and open
end wrench. Save hardware. (FIG 7)
Remove the sway bar link from the sway
bar using a 18mm wrench and 6mm allen
wrench. (FIG 8)
Loosen the lower control arms at both
the frame and axle using 21mm & 24mm
sockets and wrenches. (FIG 5)
Loosen the upper control arms at both
the frame and axle using a 18mm
socket and wrench. (FIG 6)
1.75” Coil Spacer Lift Kit Installation: Front
FIG5 FIG6
FIG7 FIG8
Disconnect the shocks from the axle
using a 18mm socket and open end
wrench. Save hardware. (FIG 9)
Remove the shocks from the frame using
a 18mm socket. (FIG 10) Save hardware.
FIG9 FIG10
QJL_1.75_LIFT_16400_0010_LTR.indd 5QJL_1.75_LIFT_16400_0010_LTR.indd 5 9/11/20 1:29 PM9/11/20 1:29 PM

6
1.75” Coil Spacer Lift Kit Installation: Front
Using pliers, squeeze the clamp and
remove the axle vent hose. On Rubicon
models, slide the gray tab, squeeze and
remove the axle locker harness plug.
Remove the harness from the upper control
arm using a trim removal tool. (FIG 13)
On the passenger side, slide the gray tab,
squeeze and remove the axle disconnect
harness plug. Remove the harness from
the axle housing and upper control arm
using a trim removal tool. (FIG 14)
Disconnect the brake line brackets from
the lower control arm using a 15mm
socket. (FIG 11) Save hardware.
Disconnect the brake line bracket from
the coil spring mount using a 10mm
wrench. (FIG 12) Save hardware.
FIG11 FIG12
FIG13 FIG14
FIG15
Remove factory coil spring isolator and
replace it with provided coil spacer.
Make sure both posts are properly
indexed in the frame holes on the
spacer. (FIG 15)
QJL_1.75_LIFT_16400_0010_LTR.indd 6QJL_1.75_LIFT_16400_0010_LTR.indd 6 9/11/20 1:30 PM9/11/20 1:30 PM

7
1.75” Coil Spacer Lift Kit Installation: Front
FIG16
Loosely re-attach the sway bar links to the
axle using factory hardware. Only
the driver’s side will get a large 7/16”
washer on the nut side. (FIG 19)
Install the shock mounting brackets as
shown with the 3.5” long 1/2” bolt, 7/16”
washers, spacer and nut as shown through
the original mounting hole. (FIG 20)
FIG17
FIG18
FIG19 FIG20
With axle in drop position, place bump
stop in coil spring, and re-install coil
springs. Attach bump stop to axle using
the 3/8” hex head bolts, washer and
ange nut, tighten until there is slight
deformation of bump stop using a 9/16”
socket. Repeat this on other side of the
vehicle. Raise axle just enough to keep
the springs in place. Make sure the
spring are properly indexed on the lower
isolators. (FIG 16)
Assemble the sway bar links as shown
using the hourglass bushings and
sleeves. Glass cleaner and a vice helps
with the assembly.
Loosely attach the sway bar links to
the sway bar with the 3” long ½” bolts,
7/16” washers and nuts as shown using
¾” tools. (FIG 18)
QJL_1.75_LIFT_16400_0010_LTR.indd 7QJL_1.75_LIFT_16400_0010_LTR.indd 7 9/11/20 1:31 PM9/11/20 1:31 PM

8
1.75” Coil Spacer Lift Kit Installation: Front
On the lower side use the M8 hardware.
½” hardware uses ¾” tools and the M8
bolt is 12mm and nut is 13mm. Tighten all
hardware evenly.
Carefully raise the axle using a oor jack
so the full weight of the vehicle is on the
coil springs. Install the wheels/tires and
torque to the vehicles owners manual
specications.
Remove the jack stands and lower
vehicle onto the tires. Reconnect the locker
harness if present, vent line, axle vacuum
disconnect, brake lines to coil buckets and
to the lower control arms.
This completes the installation work
on the front of the vehicle.
Torque all front end control arm and
track bar hardware once the rear
installation is complete.
Only once the vehicle is on the ground
with all weight on the tires you may now
fully torque all hardware to specications.
Front Torque Specs:
Upper control arms: 80ft-lbs.
Upper control arm heat shields: 40in-lbs.
Lower control arms: 190ft-lbs.
Brake hose to lower control arms: 15ft-lbs.
Brake hose to coil spring mounts: 40in-lbs.
Track bar: 110ft-lbs.
Sway bar links: 60ft-lbs.
Lower shock mount to axle: 75ft-lbs
Upper shock mount to frame: 80ft-lbs
QJL_1.75_LIFT_16400_0010_LTR.indd 8QJL_1.75_LIFT_16400_0010_LTR.indd 8 9/11/20 1:31 PM9/11/20 1:31 PM

9
1.75” Coil Spacer Lift Kit Installation: Rear
Loosen the rear track bar at both the
frame and axle using a 21mm socket and
wrench. (FIG 21) Remove bolt from the
axle end and save hardware.
Loosen the lower control arms at both
the frame and axle using a 21mm socket
and wrench. (FIG 22)
FIG21 FIG22
ALWAYS SUPPORT FRAME RAILS USING JACK STANDS.
Moving to the rear of the vehicle; use
a wheel chock on the front tires to
prevent the vehicle from rolling forward
and release the emergency brake.
Raise the rear of the vehicle and support
frame rails using jack stands. Do not lower
the axle at this time. Remove wheels/tires.
Loosen the upper control arms at both the
frame and axle using a 21mm socket and
wrench. (FIG 23)
Disconnect the shocks from the axle using
a 18mm socket and open end wrench.
Save hardware. (FIG 24)
FIG23 FIG24
QJL_1.75_LIFT_16400_0010_LTR.indd 9QJL_1.75_LIFT_16400_0010_LTR.indd 9 9/11/20 1:31 PM9/11/20 1:31 PM

10
1.75” Coil Spacer Lift Kit Installation: Rear
FIG25 FIG26
FIG27
Disconnect the rear sway bar end links at
the axle using a 18mm socket and wrench.
(FIG 25) Save hardware.
Install new bump stop with the
provided 3/8” at socket head bolts and
ange nuts as shown and tighten until
there is slight deformation of bump stop.
(FIG 26)
Install the shock mounting brackets
as shown with the 3.5” long 1/2” bolt,
7/16” washers, spacer and nut as shown
through the original mounting hole. On
the lower side use the M8 hardware and
fender washers. ½” hardware uses ¾”
tools and the M8 bolt is 12mm and nut
is 13mm. Tighten all hardware evenly.
(FIG 27)
FIG28
Properly index and Position the new
coil spacers into the frame mounts and
re-install the coil springs. Raise the axle
slowly making sure the spacers are still
properly indexed in the mounting holes.
Help from a friend is advised for this
step. (FIG 28)
Carefully raise the axle using a oor jack
so the full weight of the vehicle is on the
new coil springs. Re-attach the brake lines
to the upper control arm mounts, torque
the sway bar link to sway bar hardware.
Install the wheels/tires and torque to the
vehicles owners manual specications.
Remove the jack stands and lower vehicle
onto the tires. Reconnect the locker harness
if present, e-brake cables and track bar.
This completes the installation work
on the rear of the vehicle.
QJL_1.75_LIFT_16400_0010_LTR.indd 10QJL_1.75_LIFT_16400_0010_LTR.indd 10 9/11/20 1:32 PM9/11/20 1:32 PM

11
1.75” Coil Spacer Lift Kit Installation: Rear
Loosen the drag links turnbuckle
bolt using a 15mm socket. Adjust the
turnbuckle until the steering wheel is back
on center best as possible. Tighten the
15mm nut to 50ft-lbs. (FIG 29)
Installation is now complete.
FIG29
Front:
Upper control arms: 80ft-lbs.
Upper control arm heat shields: 40in-lbs.
Lower control arms: 190ft-lbs.
Brake hose to lower control arms: 15ft-lbs.
Brake hose to coil spring mounts: 40in-lbs.
Track bar: 110ft-lbs.
Sway bar links: 60ft-lbs.
Lower shock mount to axle: 75ft-lbs
Upper shock mount to frame: 80ft-lbs
Rear:
Upper control arm to axle: 95ft-lbs.
Upper control arm to frame: 120ft-lbs.
Lower control arms: 90ft-lbs.
Brake hose to axle: 15ft-lbs.
Track bar: 90ft-lbs.
Sway bar links to axle: 60ft-lbs.
Lower shock mount to axle: 75ft-lbs
Upper shock mount to frame: 80ft-lbs.
COMPLETE INSTALLATION BY CAREFULLY INSPECTING AND
CONFIRMING CLEARANCE OF CHOSEN TIRE/WHEELS THROUGH
FULL STEERING SWEEP AND SUSPENSION TRAVEL. ASSURE
BRAKE LINES CLEAR AND NOT RUBBING AGAINST ANY
SURFACE, ABS FITTING AND OTHER FASTENERS SECURED.
CHECK SPEEDOMETER READINGS AND IF NECESSARY
RECALIBRATE. HAVE ALIGNMENT SETTINGS CHECKED AND IF
INDICATED,RE-ALIGN AT SHOP WITH EQUIPMENT SUITED FOR
MODIFIED SUSPENSION JEEP VEHICLES.
INSTALL COCKPIT WARNING STICKER ON VISOR OR
OTHERLOCATION VISIBLE TO ALL DRIVERS.
Install cockpit
warning sticker
on visor or other
location visible
to all drivers
and occupants.
Only once the vehicle is on the ground
with all weight on both axles and all four
the tires may you now fully torque all
front and rear hardware to specications.
A professional alignment is recommended
after lift kit installation but you will need
to get the steering wheel close to center
to prevent ESP warnings until you do so.
Slowly Drive the vehicle a few feet in a
straight line so you know the tires are
straight. The steering wheel should
be off-center.
QJL_1.75_LIFT_16400_0010_LTR.indd 11QJL_1.75_LIFT_16400_0010_LTR.indd 11 9/11/20 1:33 PM9/11/20 1:33 PM

12
Quadratec®Exclusive
Limited Lifetime Warranty
Your Quadratec® branded accessories arecovered
by the following Limited Warranty provided
exclusively by Quadratec, Inc.,
1028 Saunders Lane, West Chester PA 19380.
This Limited Warranty is the only warranty made
in connection with your purchase.
Quadratec neither assumes nor authorizes any
vendor, retailer or other person or entity to assume
for it any other obligation or liability in connection
with thisproduct or Limited Warranty. This
Limited Warranty does not apply and is not
cumulative toany accessory or part distributed by
Quadratecfor which the Manufacturer provides a
separatewritten warranty.
What is Covered: Subject to the terms, exclusions
and limitations herein and with respect only to
Quadratec branded accessories rst sold in the
United States, Quadratec warrants to the
initialretail purchaser only that your Quadratec
accessory shall be free of defects in material
and workmanship: for as long as the original
purchaser owns the vehicle. The Warranty on
bushings and other serviceable wear items
(including shockabsorbers) is limited to 1 year
from date of retail purchase. This Limited
Warranty is not assignable and shall terminate
upon sale of the vehicle upon which the
Quadratec accessory is installed or other transfer
third persons.
All other warranties are hereby disclaimed,
except to the extent prohibited by applicable
law in which case any implied warranty of
merchantability or tness for a particular purpose
on thislimited to for as long as the original
purchaser owns the vehicle. Quadratec reserves
the rights to: (a.) require invoice or other proof
your accessoryis within the terms of this Limited
Warranty as a condition of warranty service and,
(b.) makefuture revisions to this product and
Limited Warranty without prior notice or
obligation to upgrade your product.
What is Not Covered:
Your Quadratec Limited Warranty does not cover
products or parts Quadratec determines to have
been damaged by or subjected to: (a.) installation
damage, alteration, modication, combination
with other parts, failure to maintain or improper
repair or service, (b.) defects or use whichpre-dates
installation of Quadratec® accessory
or suspension kit by authorized dealer or shop,(c.)
normal wear & tear or gradual reduction
inexpected performance of vehicle or components,
(d.) emissions control or electronic stability
systems or components, (e.) cosmetic damage or
damage from moisture or water immersion,
(f.) eet, rental or commercial use, (g.) Acts of
God, accidents, misuse, negligence, inadequate
mounting or impact with vehicle(s), obstacles or
other aspects of the environment, (h.) theft,
vandalism or other intentional damage.(i.) use in
competition or racing.Other Exclusions: Surface
nish of exposed suspension components is not
covered underthis Limited Warranty.
Remedy Limited to Repair/Replacement:
The exclusive remedy provided hereunder shall,
upon Quadratec inspection and at Quadratec’s
option, be either repair or replacement of product
or parts (new or refurbished) covered under this
Limited Warranty. Customers requesting warranty
consideration should rst contact Quadratec to
obtain a RGA number (610-701-3336).
All labor, removal, shipping and installation costs
arecustomer’s responsibility.
Other Limitations - Exclusion of Damages
- Your Rights Under State Law:
In consideration of the purchase price paid,
neither Quadratec nor any independent Quadratec
distributor/licensee are responsible for
any time loss, rental costs, or for any incidental,
consequential, punitive or other damages you may
have or incur in connection with any part or
productpurchased. Your exclusive remedy
hereunder for covered parts is repair/replacement
as described above.This Limited Warranty gives
you specic rights. You may also have other
rights that vary from state to state. For example,
some states do not allow limitations of how
long an implied warranty lasts and /or do not
allow the exclusion or limitation of incidental or
consequential damages, so the limitations and
exclusions herein may not apply to you.
©Quadratec, Inc. 2020. All Rights Reserved.
4.24.20 LTR Version Part #12999.3166
QJL_1.75_LIFT_16400_0010_LTR.indd 12QJL_1.75_LIFT_16400_0010_LTR.indd 12 9/11/20 1:33 PM9/11/20 1:33 PM