D 150 Pickup V6-239 3.9L (1992)
Wheel Fastener: Customer Interest
Wheel - Vibration on Smooth Roads at Highway Speeds
NO.: 22-02-92
GROUP: Wheels
DATE: Apr. 6, 1992
SUBJECT:
Wheel Vibration
NOTE:
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 22-01-91 REV. A WHICH SHOULD BE REMOVED FROM YOUR FILES.
ALL REVISIONS ARE HIGHLIGHTED IN RED AND **ASTERISKS**.
NOTE:
THIS BULLETIN APPLIES TO 350 SERIES AD MODELS WITH FLANGE TYPE LUG NUTS.
MODELS:
1989-1992 (AD) Ram Pickup/Ram Cab & Chassis Power Ram Cab & Chassis
SYMPTOM/CONDITION:
A customer complaint of a wheel and tire vibration, at highway speeds, on smooth road surfaces. This condition may be caused by the wheels being off
center on the wheel studs.
DIAGNOSIS:
A properly centered wheel will have a balanced amount of space for each lug nut flange to the wheel center hole; an off center condition will show a
variable amount of space. Perform a visual inspection and road test vehicle to verify condition.
PARTS REQUIRED:
2
90~ Cone Nuts
1273556
REPAIR PROCEDURE:
This repair involves wheel centering procedure.
1.
Raise the vehicle so that the tire(s) are off the ground. Do not remove the wheel(s) from the vehicle.
2.
Loosen all lug nuts. Remove two (2) of the flange nuts 180~ apart (do not discard). Use the positions with the largest flare surface for cone nut
contact.
3.
Replace the two (2) flange nuts with the 90~ cone nuts, PN 1273556, and torque to 68 N-m (50 ft.lbs.).
4.
Some loosening and tightening of the cone nuts and repositioning of the wheel might be necessary to obtain a centered wheel.
5.
When centered, tighten the six (6) flange nuts and torque to 68 N-m (50 ft. lbs.). Replace the two (2) cone nuts with the flange nuts that were
previously removed and torque to 68 N-m (50 ft.lbs.).
