M/T, A/T - No Alignment Dowels Causes Premature Wear

90bmw08

Group 23 Manual and Auto. Transmission Dowel Part Number
Bulletin Number 23 02 90 (3018) Page 1 of 2
Woodcliff Lake, NJ April 1990 Service Engineering
SUBJECT: Alignment Dowel Pins

MODELS: All

Situation: Two alignment dowel pins are used at the engine/transmission mating point. During repairs which require the transmission to be detached from the engine, the dowel pins can be loosened and fall out of their drillings.

The correct engine/transmission mating point alignment is determined by the presense of the dowel pins.


The absence of one or both dowel pins can result in premature clutch wear, converter bearing wear or M20/M21 starter problems.

Solution: Whenever repairs are performed which require separation of the engine and transmission, the alignment dowel pins should be replaced.



Dowel Pin Location:
Parts
Information: The required alignment dowel pins can be ordered using the following parts numbers:

Engine (M20, M21) dowel pin: 11 12 1 726 239

Manual transmission dowel pin: 23 11 1 606 156

Automatic transmission dowel pin: 24 41 1 200 459