Rear Suspension - Service Manual Revision
FILE IN SECTION: 3 - Steering/SuspensionBULLETIN NO.: 56-34-01
DATE: March, 1995
SUBJECT:
Section 3D - Rear Suspension
MODELS:
1991-95 Chevrolet and GMC Truck C/K Models
This bulletin updates Section 3D "Rear Suspension" of the 1991-95 C/K Truck Service Manuals. The current Service Manual information has been changed to include torque callouts for C3500 HD Leaf Spring Replacement.
LEAF SPRING REPLACEMENT
1991-95 C3500 HD
Remove or Disconnect (Figures 1 and 2)
^ Raise vehicle on a hoist and support rear axle independently to relieve tension on leaf springs.
1. U-bolt nuts and washers.
2. Anchor plate.
3. U-bolts and spacer.
^ Loosen shackle to spring nut.
4. Shackle to rear bracket nut, washers, and bolt.
5. Shackle to front bracket nut, washers, and bolt.
6. Spring assembly from the vehicle.
Install or Connect (Figures 1 and 2)
1. Spring assembly to the vehicle.
2. Spring to front bracket bolt, washers and nut.
^ Do not tighten.
3. Spring to rear bracket bolt, washers, and nut.
^ Do not tighten.
4. Spacer and "NEW" U-bolts to the top of the spring.
5. Anchor plate.
6. Washers and nuts.
Tighten
^ Tighten nuts in sequence (Figure 3).
^ Tighten nuts:
100 and 200 Models 110 Nm (81 lb.ft.)
300 Models without Dual
Rear Wheels or 7.4L Engine 110 N.m (81 lb.ft.)
300 Models with Dual Rear
Wheels or 7.4L Engine
without Dual Rear Wheels 148 Nm (109 lb.ft.)
3500 HD 280 Nm (207 lb.ft.)
Adjust (Figure 4)
^ The spring height to obtain a measurement of 182 mm (7-11/64 inches) between the top of the axle jounce pad and the bottom surface of the frame jounce bracket.
Tighten
^ Tighten Leaf Spring To Bracket Nuts:
C/K 1, 2, 3 125 Nm (92 lb ft)
3500 HD 435 Nm (320 lb ft)
^ Tighten Leaf Spring To Shackle Nut:
C/K 1,2, 3 110 Nm (81 lb.ft.)
3500 HD 185 Nm (136 lb.ft.)
^ Tighten Shackle To Bracket Nuts:
C/K 1,2, 3 110 Nm (81 lb.ft.)
3500 HD 185 Nm (136 lb.ft.)