Leaf Spring Replacement All Single Rear Wheels

1. Raise the vehicle on a hoist.

Support the rear axle independently in order to relieve the tension on the leaf springs.




2. Remove the U-bolt nuts (6).
3. Remove the washers (5).
4. Remove the anchor plate (7).
5. Remove the U-bolts (1),(4).
6. Remove the spacer (8).

Loosen the shackle to spring nut.

7. Remove the following parts:

•	The shackle (3)

•	The shackle to rear bracket nut

•	The washers

•

The bolt

8. Remove the spring to front bracket.
9. Remove the following spring to front bracket parts:

•

The nut

•	The washers

•

The bolt




10. Remove the spring assembly from the vehicle.

1. Install the spring assembly to the vehicle.



2. Install the following spring to front bracket parts:

•

The bolt

•	The washers

•

The nut

•	Do not tighten the nut.

3. Install the following parts:

•	The shackle (3)

•	The shackle to rear bracket bolt

•	The washers

•

The nut

•	Do not tighten the nut.

4. Install the spacer (8).

Important: Do not use old U-bolts.

5. Install the new U-bolts (1, 4) to the top of the spring.
6. Install the anchor plate (7).
7. Install the washers (5).




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

8. Install the nuts (6).

Tighten

1. Tighten the U-bolt nuts in the sequence shown.
2. Tighten the U-bolt nuts to 110 N·m (81 lb ft).
3. Adjust the spring height between the top surface of the axle jounce pad and the bottom surface of the frame jounce bracket.
4. Tighten the leaf spring to bracket nuts to 95 N·m (70 lb ft).
5. Tighten the leaf spring to shackle nut to 95 N·m (70 lb ft).
6. Tighten the shackle to bracket nuts to 95 N·m (70 lb ft).

Leaf Spring Replacement All Dual Rear Wheels-Except C3500HD

1. Raise the vehicle. Support the vehicle with suitable safety stands. Refer to Lifting and Jacking the Vehicle in General Information.

Support the rear axle independently in order to relieve the tension on the leaf springs.




2. Remove the U-bolt nuts (6).
3. Remove the washers (5).
4. Remove the anchor plate (7).
5. Remove the U-bolts (1),(4).
6. Remove the spacer (8).

Loosen the shackle to spring nut.

7. Remove the following parts:

•	The shackle (3)

•	The shackle to rear bracket nut

•	The washers

•

The bolt

8. Remove the spring to front bracket.
9. Remove the following spring to front bracket parts:

•

The nut

•	The washers

•

The bolt




10. Remove the spring assembly from the vehicle.

1. Install the spring assembly to the vehicle.



2. Install the following spring to front bracket parts:

•

The bolt

•	The washers

•

The nut

•	Do not tighten the nut.

3. Install the following parts:

•	The shackle (3)

•	The shackle to rear bracket bolt

•	The washers

•

The nut

•	Do not tighten the nut.

4. Install the spacer (8).

Important: Do not use old U-bolts.

5. Install the new U-bolts (1, 4) to the top of the spring.
6. Install the anchor plate (7).
7. Install the washers (5).




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

8. Install the nuts (6).

Tighten

1. Tighten the U-bolt nuts in the sequence shown.
2. Tighten the U-bolt nuts to 110 N·m (81 lb ft).
3. Adjust the spring height between the top surface of the axle jounce pad and the bottom surface of the frame jounce bracket.
4. Tighten the leaf spring to bracket nuts to 95 N·m (70 lb ft).
5. Tighten the leaf spring to shackle nut to 95 N·m (70 lb ft).
6. Tighten the shackle to bracket nuts to 95 N·m (70 lb ft).

Leaf Spring Replacement Dual Rear Wheels-C3500HD

1. Raise the vehicle. Support the vehicle with suitable safety stands. Refer to Lifting and Jacking the Vehicle in General Information.

Support the rear axle independently in order to relieve the tension on the leaf springs.

2. Remove the U-bolt nuts.
3. Remove the washers.
4. Remove the anchor plate.
5. Remove the U-bolts.
6. Remove the spacer.

Loosen the shackle to spring nut.

7. Remove the following parts:

•	The shackle

•	The shackle to rear bracket nut

•	The washers

•

The bolt

8. Remove the spring to front bracket.
9. Remove the following spring to front bracket parts:

•

The nut

•	The washers

•

The bolt




10. Remove the spring assembly from the vehicle.

1. Install the spring assembly to the vehicle.
2. Install the following spring to front bracket parts:

•

The bolt

•	The washers

•

The nut

•	Do not tighten the nut.

3. Install the following parts:

•	The shackle

•	The shackle to rear bracket bolt

•	The washers

•

The nut

•	Do not tighten the nut.

4. Install the spacer.

Important: Do not use old U-bolts.

5. Install the new U-bolts to the top of the spring.
6. Install the anchor plate.
7. Install the washers.




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

8. Install the nuts.

Tighten

1. Tighten the U-bolt nuts in the sequence shown.
2. Tighten the U-bolt nuts to 148 N·m (109 lb ft).
3. Adjust the spring height between the top surface of the axle jounce pad and the bottom surface of the frame jounce bracket.
4. Tighten the leaf spring to bracket nuts to 415 N·m (306 lb ft).
5. Tighten the leaf spring to shackle nut to 213 N·m (157 lb ft).
6. Tighten the shackle to bracket nuts to 213 N·m (157 lb ft).