33 90 ... Rear Axle Troubleshooting
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 BMW 750i, 2008 BMW 750Li, 2007 BMW 750i, 2007 BMW 750Li, and 2006 BMW 750i. However, it is still accessible from the selected car via links, so may be relevant.
Observe troubleshooting for shock absorbers.
REAR AXLE TROUBLESHOOTING REFERENCE
| Fault | Cause | Remedy |
|---|---|---|
| Grinding noise (only when cornering) | Diagnose brake system | |
| Wheel bearings faulty | Replace wheel bearings . See 33 41 151 REPLACING LEFT OR RIGHT WHEEL BEARING ON REAR AXLE SHAFT . | |
| Vibration (90 - 160 km/h) | Wheel imbalance | Balance wheels |
| Radial/lateral rim runout | Check rims, replace if necessary | |
| Radial tire runout | Match or replace tires | |
| Imbalance in output shaft | Replace output shaft . See 33 21 001 REMOVING AND INSTALLING/REPLACING LEFT OUTPUT SHAFT or 33 21 002 REMOVING AND INSTALLING/REPLACING RIGHT OUTPUT SHAFT . | |
| Drumming | Rubber mount of final drive suspension faulty | Replace rubber mount . See 33 17 004 REPLACING ALL FRONT RUBBER MOUNTS FOR REAR DIFFERENTIAL MOUNTING and 33 17 005 REPLACING RUBBER MOUNT FOR REAR DIFFERENTIAL MOUNTING AT REAR . |
| Rubber mount of rear axle carrier faulty | Replace rubber mount . See 33 17 004 REPLACING ALL FRONT RUBBER MOUNTS FOR REAR DIFFERENTIAL MOUNTING and 33 17 005 REPLACING RUBBER MOUNT FOR REAR DIFFERENTIAL MOUNTING AT REAR . | |
| Rattling noise | Refer to TROUBLESHOOTING FOR SHOCK ABSORBERS . | |
| Stabilizer link loose or defective | Check screw connection, replace stabilizer link if necessary. See 33 55 040 REPLACING STABILIZER LINK FOR REAR LEFT OR RIGHT STABILIZER . | |
| Rubber mount of rear axle carrier loose or faulty | Check seat, replace rubber mount if necessary. See 33 17 004 REPLACING ALL FRONT RUBBER MOUNTS FOR REAR DIFFERENTIAL MOUNTING and 33 17 005 REPLACING RUBBER MOUNT FOR REAR DIFFERENTIAL MOUNTING AT REAR . | |
| Poor straight-running stability (steering wheel inclination) | Rubber mount of rear axle carrier faulty | Replace rubber mount . See 33 17 004 REPLACING ALL FRONT RUBBER MOUNTS FOR REAR DIFFERENTIAL MOUNTING and 33 17 005 REPLACING RUBBER MOUNT FOR REAR DIFFERENTIAL MOUNTING AT REAR . |
| Rubber mount/ball joint of control or guide arm faulty | Replace control or guide arm . See 33 32 071 REPLACING ONE UPPER CONTROL ARM and 33 32 091 REPLACING A GUIDE ARM . | |
| Ball joint in wheel carrier faulty | Replace ball joint . See 33 32 125 REPLACING A BALL JOINT IN LOWER STEERING KNUCKLE/WHEEL CARRIER . | |
| Rubber mount of swinging arm faulty | Replace swinging arm . See 33 32 064 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT SWINGING ARM . | |
| Rear axle alignment incorrectly adjusted | Carry out chassis/wheel alignment check , align rear axle if necessary. See 32 00 ... CHASSIS/WHEEL ALIGNMENT CHECK PROCEDURE . | |
| Unsteady taking of curves due to self-steering or poor rear end track stability | Rubber mount of rear axle carrier faulty | Replace rubber mount . See 33 17 004 REPLACING ALL FRONT RUBBER MOUNTS FOR REAR DIFFERENTIAL MOUNTING and 33 17 005 REPLACING RUBBER MOUNT FOR REAR DIFFERENTIAL MOUNTING AT REAR . |
| Rubber mount of final drive suspension faulty | Replace rubber mount . See 33 17 004 REPLACING ALL FRONT RUBBER MOUNTS FOR REAR DIFFERENTIAL MOUNTING and 33 17 005 REPLACING RUBBER MOUNT FOR REAR DIFFERENTIAL MOUNTING AT REAR . | |
| Refer to TROUBLESHOOTING FOR SHOCK ABSORBERS . | ||
| Excessive tire wear | Front or rear axle alignment incorrectly adjusted | Carry out chassis/wheel alignment check , align rear axle if necessary. See 32 00 ... CHASSIS/WHEEL ALIGNMENT CHECK PROCEDURE . |