Suspension U-Bolt Torque Checking
Check the U-bolt torque of both the front and rear axles where applicable.
Caution: Failure to retorque the U-bolt nuts could result in spring breakage and abnormal tire wear.
- Park the vehicle on a flat surface and apply the parking brakes. Chock the tires to prevent the vehicle from moving.
- Check the U-bolt torque in a diagonal pattern. Set a click-type
torque wrench to the highest torque value for the fastener being checked.
See Table. for
U-bolt torque specifications. Turn the wrench in a clockwise motion
(looking up) until the torque wrench clicks.
Table 1, Spring Assembly U-Bolt High Nut Torque Values
Spring Assembly U-Bolt High Nut Torque Values1
Size
Torque: lbf·ft (N·m)
5/8–18
Stage 1: Hand-tighten Stage 2: 60 (81) Stage 3: 200 (271) Stage 4: 180 to 230 (245 to 313)
3/4–16
Stage 1: Hand-tighten Stage 2: 60 (81) Stage 3: 200 (271) Stage 4: 270 to 330 (367 to 449)
7/8–14
Stage 1: Hand-tighten Stage 2: 60 (81) Stage 3: 200 (271) Stage 4: 420 to 500 (571 to 680)
1–14
Stage 1: Hand-tighten Stage 2: 60 (81) Stage 3: 200 (271) Stage 4: 520 to 600 (707 to 816)
Table 1, Spring Assembly U-Bolt High Nut Torque Values
Fig. 1, Tightening Pattern for U-Bolt High Nuts