A/T - Suction Noises When Cold

91bmw01

Group 24 Automatic Transmission


Bulletin Number 24 06 89 (1963) Page 1 of 2


Woodcliff Lake, NJ January 1991 Service Engineering


This Service Information Bulleting supersedes S.I. 24 06 89 (1963) dated January 1990. It adds to the Parts Information.

Please remove and discard S.I. 24 06 89 (1963) dated January 1990 from your S.I. binder.

SUBJECT: Automatic Transmission Pickup Screen

MODELS: All with deep oil pan (from 2/88 production)

Situation: The above models may produce "suction" noises when cold.

Cause: Cold ambient temperatures cause the ATF volume to contract to the minimum operating level. An air/oil mixture may be drawn into the oil strainer during initial cold weather operation.

Solution: Replace the existing ATF oil strainer and O-ring with the improved version.

Parts
Information: The improved ATF oil strainer has been phased into production as of September 1989 and can be identified by a rolled lip to retain the O-ring. The improved version strainer (and O-ring) can be ordered using the following part numbers:

DEEP OIL PAN

MODELS: E31, E32 and E34 from 2/88

Oil Strainer: P/N 24 31 1 218 571
O-Ring: P/N 24 31 1 218 570

FLAT OIL PAN

MODELS: E30 and ALL models before 2/88

Oil Strainer: P/N 24 31 1 218 550
O-Ring: P/N 24 31 1 218 570

NOTES: DO NOT use O-ring P/N 24 34 1 217 437 with the new design strainers.

When servicing transmissions with the early design strainers (identified by absence of rolled lip to retain O-ring) and the strainer is to be reused, use ONLY O-ring P/N 24 34 1 217 437.


Warranty
Information: Covered under the terms of the applicable BMW New Car Limited Warranty.

Defect code: 24 31 01 39 00

Labor operation: 24 31 154

Labor allowance: 10 FRU