Rear Leaf Spring - Squeaks On Rough Roads
TS85-138November 22, 1985
Rear Axle & Suspension
REAR SPRING SQUEAK, 4X4 720 TRUCK
APPLIED MODEL:
1983.5 - 1986 4X4 720 Truck
SERVICE INFORMATION
The springs on some 1983.5 - 1986 4X4 Trucks may squeak when the truck is driven over rough roads. The noise is caused by the rear suspension number four leaf spring rubbing against the U-shaped bracket. A countermeasure number four leaf spring (with wider U-bracket and plastic liner) is available to correct this condition.
PARTS INFORMATION
QUANTITY
PART DESCRIPTION REQUIRED PART NUMBER
Countermeasure #4 Leaf
(with U-bracket and 2 55024-30W05
liner)
SERVICE PROCEDURE
1. Raise the truck on a frame type hoist to allow the rear axle to hang down.
2. Support the rear differential with a transmission jack.
3. Remove the left rear wheel to allow access to the U-bracket torx bolt.
4. Remove the torx bolt of the U-bracket on the number four leaf of the left spring.
NOTE: Illustration is of right spring.
5. Loosen (do not remove) the shock absorber lower end nut and remove the two U-bolts (4 nuts). Allow lower spring pad to hang from shock absorber.
6. Lower the differential (with transmission jack).
"CAUTION": Be careful not to stretch the brake hose.
7. Remove the nut that holds the leaves together.
8. Remove the #4 leaf and replace with the countermeasure leaf (with wider U-bracket).
9. Reassemble in reverse order of removal.
10. U-bolt nut torque: 65-72 ft-lbs. Shock absorber lower end nut torque: 22-30 ft-lbs.
11. Repeat Steps 4 through 10 for the right rear spring.
WARRANTY INFORMATION
CS PNC CT OP CODE FLAT RATE
4R 55020 35 LK99AA 0.5/hr.
NOTE: Flat rate time is for both springs.