Trail Master TM3330-40020, TM3330-40053 User Manual
400 W. Artesia Blvd. Fax: (310) 747-3912
Compton, CA 90220 Ph: (877) 695-7812
www.trailmastersuspension.com
JEEP WRANGLER 4 DOOR (JK) 3” SPRING KIT
‘07- ’13 KIT# TM3330-40020 & TM3330-40053
WARNING
Installation of a Trail Master suspension lift kit will
change the vehicle’s center of gravity and handling
characteristics both on- and off-road. You must drive
the vehicle safely! Extreme care must be taken to
prevent vehicle rollover or loss of control, which
could result in serious injury or death. Avoid sudden
sharp turns or abrupt maneuvers and always make
sure all vehicle occupants have their seat belts fastened.
WARNING
Before you install this kit, read and understand all
instructions, warnings, cautions, and notes in this
instruction sheet and in the vehicle owner’s manual.
CAUTION
Proper installation of this kit requires knowledge of
the factory recommended procedures for removal
and installation of original equipment components.
We recommend that the factory shop manual and
any special tools needed to service your vehicle be
on hand during the installation. Installation of this kit
without proper knowledge of the factory recommended procedures may affect the performance of
these components and the safety of the vehicle. We
strongly recommend that a certified mechanic familiar with the installation of similar components install
this kit.
WARNING
This kit should only be installed on a vehicle that is in
good working condition. Before you install the kit,
thoroughly inspect the vehicle for corrosion or deformation of the sheet metal. If the vehicle is suspected
to have been in a collision or misused, do not install
this kit. Off-road use of your vehicle with this kit installed may increase the stress applied to the factory
components. Failure to observe this warning may
result in serious personal injury and/or severe damage to your vehicle.
WARNING
Many states and municipalities have laws restricting
bumper heights and vehicle lifts. Consult state and
local laws to determine if the changes you intend to
make to the vehicle comply with the law.
WARNING
The installation of larger tires may reduce the effectiveness of the braking system.
WARNING
Always wear eye protection when operating power
tools.
WARNING
Before you install this kit, block the vehicle tires to
prevent the vehicle from rolling.
WARNING
DO NOT combine suspension, body, or other lift devices. Use of vehicle with combined lifts may result
in unsafe and/or unexpected handling characteristics.
NOTE
Lift height may vary depending on vehicle configuration, engine size, additional accessories, the factory
suspension package, and vehicle’s condition.
NOTE
Trail Master recommends using thread locking compound on the threads of all kit nuts and bolts unless
specified otherwise in these instructions.
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2
Before Starting Installation
NOTE
Kit parts are prefaced by the word kit and appear in
bold print.
1. Carefully read all warnings and instructions completely before beginning.
2. Verify all parts have been received in this kit by
checking the parts list at the end of this document.
3. Only install this kit on the vehicle for which it
is specified. If anytime during the installation you
encounter something different from what is outlined
in the instructions, call technical support at (877)
695-7812. Park vehicle on a clean, dry, flat, level
surface and block tires so vehicle cannot roll in either direction.
4. Park vehicle on a clean, dry, flat, level surface
and block tires so vehicle cannot roll in either direction.
5. Measure ride height with the vehicle supporting
its own weight on level ground. To settle the suspension, the vehicle should be driven forward at
least 10 feet immediately prior to taking these
measurements. Ride height is the measurement
Wheel & Tire Requirements
The factory wheel and tire combination will fit once
this kit is installed.
Torque Specifications:
See factory service manual for torque values when
reusing OE fasteners.
See factory service manual for torque values when re-using
OE fasteners.
Bolt Size Grade 5 (ft.-lbs.) Grade 8 (ft.-lbs.)
1/4”-20 10 10
1/4”-28 10 12.5
5/16”-18 17 22.5
5/16”-24 20 25
3/8”-16 30 40
3/8”-24 35 45
7/16”-14 50 65
7/16”-20 55 70
1/2”-13 75 100
1/2”-20 80 115
9/16”-12 105 135
9/16”-18 115 150
5/8”-11 150 195
5/8”-18 160 210
3/4”-16 175 225
from the center of the axle straight up (vertical) to
the fender lip. Record this measurement for all four
wheels.
NOTE
Adhere to recommendations when replacement fasteners, retainers and keepers are called out in the factory service manual. When re-assembling the vehicle it
is recommended by the vehicle manufacturer that certain fasteners are replaced in order to maintain proper
retention characteristics. This system may not include
all replacement hardware as recommended by the factory service manual. Additional replacement hardware
should be obtained prior to installation of this system
to meet the requirements of the factory service manual.
Engine Compartment
1. Disconnect both battery cables. Disconnect
negative cable first, then positive cable.
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Prepare to Install Front
Suspension
WARNING
Compressed coil springs can expand violently causing
serious personal injury. Before removing the coil
springs, lower the axle housing as far as possible to allow the coil springs to expand.
1. Loosen, but do not remove, lug nuts on each
front wheel.
2. Jack the rear of the vehicle with the floor jack
under the differential and place jack stands under the frame just behind the lower control arm
frame mounts. Leave the jack stands high
enough to let the floor jack down and still have
the front tires suspended in the air. Keep the
floor jack under the differential with slight pressure for support. Remove the front wheels.
WARNING
Use extreme caution when lifting vehicle from ground.
To prevent serious personal injury, ensure the lifting device is securely placed.
OE Coil
Spring
Install Front Suspension
1. Place the front bump stop extension (90TM10001) on the lower spring mount. Center
the extension and mark with a center punch.
3. Disconnect the track bar from the axle and save
the hardware for reuse.
4. Unbolt the front brake line brackets from the
frame. Save the hardware for reuse.
5. Unbolt the front sway bar end links from the
axle. Save the hardware for reuse.
6. Disconnect the lower shock mounts. Save the
hardware for reuse. Remove shocks if you purchased kit TM3325-40053
7. Unbolt the (1) driver side skid plate bolt and
loosen the (2) passenger side skid plate bolts.
8. Lower the jack carefully, remove the OE coil
springs and the OE isolators. Label the springs
as to which side they were removed, Left and
Right so that they are reinstalled in the side in
which they were removed.
90-TM10001
Bump Stop
Extension
Front
Axle
2. Use the previously applied mark to drill a hole in
the lower spring mount using a 5/16” drill bit.
Pre tap the hole using the supplied 3/8” X 2”
self tapping screw.
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