Wheel - Vibration
NUMBER: 86-B-73GROUP: 3E - Wheels & Tires
DATE: April, 1986
SUBJECT: M VAN WHEEL VIBRATION
MODELS: 1985-86 M VANS
On some 1985 and early production 1986 M Vans equipped with Rally Wheels, RPO ZJ7, VIN GB500001 through GB509937, a condition may exist where a wheel induced ride vibration is noticed. This condition may be caused by a variation in the wheel runout. The service procedure for diagnosing and correcting this condition is as follows:
1. Inspect the pilot hole area on the Rally Wheels.
NEW STYLE WHEEL:
2. If the pilot hole has similar appearance as shown in Figure No. 1 then this bulletin does not apply. Follow the procedure in Bulletin 85- B-98 for Measuring and Repairing Tire and Wheel Runout to correct the vibration complaint.
OLD STYLE WHEEL:
3. If the pilot hole area on wheels is similar to the illustration in Figure No. 2, proceed with this bulletin.
4. The suspected tire and wheel assemblies should first be balanced.
5. If a vibration still exists, follow the procedure in Bulletin 85-B-98, Measuring and Repairing Tire and Wheel Runout.
6. If this does not correct the vibration, isolate the wheel or wheels which are faulty.
7. Replace faulty wheels as necessary.
A revised wheel of the type shown in Figure No. 1 is currently being offered through WDDGM to alleviate this condition using P/N 9591183. All Rally Wheels, RPO ZJ7, not meeting runout specifications have been removed from WDDGM stock.