Specifications

SERVICE MANUAL
L
39
FRONT AXLE & SUSPENSION
Torque Requirements
k e y d e s c r i p t i o n t o r q u e +- 5%
A Front Hanger Pivot 300 ft.lbs.
B Shackle Bracket Pivot 300 ft.lbs.
C Upper Shock 125 ft.lbs.
D Lower Shock 125 ft.lbs.
E Linkage Rod Assy Locknut 11 ft.lbs.
F Leveling Valve Lockout 8 ft.lbs.
G Axle Clamp Group Nuts 295 ft.lbs.
H Air Spring Mounting Stud Locknuts (All) 25 ft.lbs.
J Shackle Bracket Locknuts 120 ft.lbs.
Front Axle Alignment Specs
Caster: 4.5° ± 1.5° positive
Camber: ± 1.0° (left & right) 2 Total
Cross Caster: 1.00° max
Toe In: 0.060” ± .030”
Ride Height Adjustment
Ride height may be verified by measuring either shock length or air spring height:
1. With leveling valve and linkage installed as shown and air system at 80 PSI or
greater, right hand side shock length from centerline of eye to centerline of
eye should be 17.25” ± .25” for Forward Engine models.
2. If adjustment is required, loosen leveling valve body mounting fasteners from
the frame rail and rotate valve counter-clockwise or clockwise to lengthen or
shorten shock dimension.
3. Tighten valve mounting fasteners to 8 ft. lbs.
4. Remove vertical link lower grommet from stud on spring pad, lower valve
horizontal arm, and release all air from bag.
5. Reconnect link and verify shock length according to step 1. If measurement
is not correct, repeat steps 1 thru 5 until proper ride height is achieved.
6. Repeat steps 1 thru 5 for left hand side.