# Group 23 Manual Transmission Service Bulletins

#### Bulletin number

#### Title

#### Description

#### Date of issue

23 01 83 (771) | Oil drain and fill plugs seized | Replace yellow plugs with black on ZF transmissions | September 1983
23 01 84 (827) | Synthetic transmission fluid 325e | As of 12/83 all use Mobil SHC 630 synthetic oil | September 1984
23 03 84 (884) | Decreasing shift effort of transmission | Use SAE 80, engine oil or ATF depending on ambient temps. Trans noise will increase as oil thins | September 1984
23 02 85 (1054) | Bolted connection between trans cross member and vehicle body | Replace square head bolts inserted in floor with P/N 23 71 1 130 250 to prevent noise. | June 1985
23 01 88 (1581) | Manual transmission input shaft lubrication | After cleaning shaft, apply Microlube GL261 P/N 81 22 9 407 436 to splines | February 1988
23 01 89 (1885) | Input bearing cover oil leak | Ensure cover is positioned correctly | June 1989
23 02 90 (3018) | Alignment dowel pins | Ensure correct location of dowel pins after transmission removal M10 - in trans, M20 in engine | April 1990

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