Rear Suspension - Clunk Noise

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Classification: Section: REAR AXLE
RA92-001 & SUSPENSION

Reference:
TECHNICAL BULLETIN ITB92-010


Models:
1990 & 1991 M30

Date:
JANUARY 30, 1992


REAR SUSPENSION "CLUNK" NOISE


APPLIED MODEL: 1990 M30 (F31)
1991 M30 (F31) Coupe & Convertible,
until March 13, 1991 Oppama Production


SERVICE INFORMATION:

Some customers may notice a light "clunking" noise from the rear of the vehicle when accelerating from a stop, or on a bumpy road surface at speeds below 5 mph.

Such a noise can be created by changes in the shock absorber dampening forces. A countermeasure Sonar Suspension control unit has been developed to eliminate the "clunking" noise in vehicles experiencing the symptom. The countermeasure unit was applied in production from March 13, 1991.





NOTE: Before installation of a control unit, physically inspect suspension components to be sure there are no worn suspension parts. Perform a function check of the Sonar Suspension system using the self-diagnosis procedure starting, as described, on page FA-29 of the 1991 Service Manual.


PARTS INFORMATION:


DESCRIPTION PART NUMBER

Sonar Suspension Control Unit 25962-F6602


WARRANTY INFORMATION:

OPERATION OP CODE CS PNC CT FLAT RATE

Rpl. Suspension Control Unit MP10AA 4R 25963 31 0.4 hrs.