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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
 

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