Technical Service Bulletin SSM 49989 — 2018 FORD F-450 SD

Some 2017-2022 F-Super Duty vehicles equipped with four-wheel drive (4WD) may exhibit steering bind or front driveline noise because the hublocks do not automatically disengage immediately following a shift from 4WD to two-wheel drive (2WD). This may be due to driveline tension between the axle and hub keeping them engaged. To correct the condition, shift the vehicle from DRIVE to REVERSE to release the driveline tension. This is a normal operating characteristic of the vehicle and replacement of the hublocks is not recommended. If the concern remains after shifting into REVERSE and allowing the vehicle to move approximately 5 feet (1.5 meters), remove and inspect the hublocks for any damage. Refer to Workshop Manual (WSM), Section 308-07A. Repair as necessary.