Trail Master Suspension TM103N CHEVEROLET SILVERADO 4WD/2WD 6 SUSPENSION LIFT KIT - Manual (Page 14)

14
TM103N
Revised
1.28.14
when the center bolt is removed. Some springs
have a factory helper spring consisting of one or
more flat leaves installed at the bottom of the leaf
pack. DO NOT install the add-a-leaf spring in or
below the helper spring.
Install Rear Suspension
1. Hold the spring assembly securely together
with “C” clamp. If necessary remove any
spring leaf alignment clamps. Remove the
spring center bolt. A hammer and drift punch
may be used to drive it out if necessary.
2. Carefully remove “C” clamps and lay unassem-
bled leaves aside.
NOTE: Add-a-leaf will be placed in the
spring assembly progressively according to
length. For example, if the existing leaves are
32” long and 25” long and the add-a-leaf is
28” long, place the add-a-leaf between the ex-
isting leaves.
3. Apply a small amount of grease to the end of
the add-a-leaf, place it in the spring assembly
as described in the note above, and reassemble
the leaf springs using the “C” clamps. Insert
the new center bolt (97-380). Torque the center
bolt nut to
20 ft./lbs. With a hacksaw, cut the
center bolt even with the top of the nut.
NOTE: The short side of the spacer will
face toward the front of the vehicle.
4. Loosely assemble the complete spring assem-
blies into their respective axle mounts. As
shown in ILLUSTRATION 15, place the
4” (95-401) blocks in position. Make sure the
pin in the block is in the hole of the axle hous-
ing spring pad. The short end of the block goes
toward the front of the vehicle. Install the
block so the pinion moves up.
NOTE: The block pin may need to be
ground down so that the block sits flat on the
perch if you are not installing traction bars at
this time.
5. Install the new “U” bolts (13-90087) over the
leaf spring assembly and using the new washers
and nuts supplied along with the existing spring
plates, torque the U-bolt nuts to
105 ft./lbs. See
Illustration 15.
6. Repeat these steps on the other side of the vehi-
cle.
7. Reattach the emergency brake line hanger to
the frame rail using the previously removed OE
bolt.
8. Bolt the rear brake line extension bracket (90-
3341) to the rear axle differential housing using
the previously removed OE bolt.
9. Carefully rotate the rubber brake line factory
bracket assembly toward the rear of the vehicle
and bolt it to the newly installed extension
bracket (90-3341) using the supplied 5/16” X
1” bolt and hardware from pack (90-6299).
NOTE: Be sure that the metal lines do not
rub or contact the rear end housing.
10. Before installing your new Trail Master shock
absorbers, it is necessary that you check for
adequate clearance. Temporarily install your
Trail Master shocks (TM75820W) into the
shock mounts. Carefully check for clearance
issues. If there are areas that come in contact
with or are very close to your new shocks, care-
fully remove sufficient material to ensure trou-
ble free operation. Pay particular attention to
the area around the lower shock mount. When
all clearance issues have been resolved, install
your new Trail Master shock absorbers and re-
check all fasteners for proper installation and
torque.
11. Install your wheels and tires and lower the ve-
hicle to the ground.
NOTE: Remove OE rotor/drum retaining
clips from wheel studs before installing the
wheels.
12. After installation is complete, double check that
all nuts and bolts are tight. Refer to the chart at
the end of this document for torque specifica-
tions. (Do not retighten nuts and bolts where
thread locking compound was used).