# Group 33 Rear Axle Service Bulletins

#### Bulletin number

#### Title

#### Description

#### Date of issue

33 01 84 (856) | Rear axle toe adjustment | Eccentric bushing for rear control arms, P/N 33 32 1 123 105 | July 1984
33 03 84 (870) | Ring Gear Bolting | New procedure, revised torque to 50-55 Nm, then torque angle 55-60° | July 1984
33 04 84 (887) | Final Drive Identification Tag decoding | Lists alphanumeric codes for differential identification | October 1984
33 01 85 (975) | Final drive capacity | E30 volume : 0.9 liters, 1.3 liters for new or rebuilt unit, reset level at 1200 miles | January 1985
33 01 87 (1329) | BMW differential oil | Change oil every inspection 2, P/N 89 89 2 000 900 | January 1987
33 03 87 (1430) | Damaged axle shaft joints and differentials | Do not allow axles to hang while running car, do not allow one wheel to be running while another is locked by parking brake or contact with lift. | July 1987
33 05 87 (1521) | Exchange final drive units | Change over speedometer transmitter when installing exchange differential | November 1987
33 01 94 (3977) | Leaking final drive | Leaks from area of speedometer transmitter my be caused by incorrectly seated O ring on transmitter. Don't push O ring past 45° chamfer | April 1994

E30 M3 Repair Manual V2.7. Copyright ©1999-2001 Koala Motorsport & Brett Anderson