Some 2021 F-150 vehicles with rear gross axle weight rating (GAWR) of 1542 kg (3,400 lb) or 1724 kg (3,800...

Bulletin number

TSB 21-2253

Component

Suspension: rear: springs

Summary

Some 2021 F-150 vehicles with rear gross axle weight rating (GAWR) of 1542 kg (3,400 lb) or 1724 kg (3,800 lb) shown on the vehicle certification (VC) label may experience a pop/clunk/snap noise from the rear of vehicle when driving up/down an incline at an angle (frame twist). This approach angle would be similar to entering or leaving a driveway. This may be due to movement between the rear spring and the rear spring mounting plate on the rear axle. To correct the condition, follow the Service Procedure to apply lubrication between the rear spring and the rear spring mounting plate mating surfaces on the rear axle.

Owners of these vehicles have filed 13 complaints in the suspension category.