Driveline - Clicking Noise

Bulletin No.
001/91

Issued
4/26/91

Revised



Category
L



Applicable Model/s
1988 -'91 929



Subject
DRIVELINE NOISE



DESCRIPTION

A clicking noise may be heard from the driveline during acceleration/deceleration, or pinging while shifting gear positions. This is the result of driveline component engagement during operation. The following modifications have been made to help eliminate this condition.

1. A coated washer/spacer is installed between the rear differential pinion bearing and the companion flange.

2. A new propeller shaft assembly with coated washer installed is now available.

If your customer complains about this, install the modified part(s).


VIN OF PRODUCTION CHANGE

Differential Coated Washer/Spacer Installation
JM1HC22**K0222217 July 1, 1989

Propeller Shaft Coated Washer/Spacer Installation
JM1HC22**M0410453 February 1, 1991



REPAIR PROCEDURE

Try to isolate the origin of the noise and make the appropriate repairs as follows:





1. If driveline noise is coming from the rear differential, replace the Companion Flange (P044 27 120B) and install a Coated Washer (P044 27 431A) between the companion flange and the rear differential pinion bearing. See procedures in your Workshop Manual (section "M" or "9").


2. If the driveline noise is coming from the propeller shaft, replace the Propeller Shaft (P057 25 010B M/T or P058 25 010B A/T). See procedures in your Workshop Manual (section "L" or "8").






PARTS INFORMATION






WARRANTY INFORMATION