Riviera V6-231 3.8L VIN L SFI (1991)
Alignment: Customer Interest
Alignment - Lead or Pull to the Left
Bulletin: 92-3-15
Date: June '92
Ref. No.: 92-230-3
Corp. Ref. No.: 213101
SUBJECT:
LEAD OR PULL TO THE LEFT
(INSTALL SHIMS AND/OR INSTALL LEFT TRANSAXLE MOUNT KIT)
MODELS AFFECTED:
1990-92 RIVIERA
Some 1990-1992 Rivieras may experience a left lead or pull condition at highway speeds. Leads and pulls are defined as follows:
Leads:
On a smooth, flat (crown-free) road with the transaxle in neutral, the vehicle does not require a noticeable torque input to the steering wheel to maintain a
straight path. However, with hands removed from the steering wheel the vehicle drifts to the left or right.
Pulls:
On a smooth, flat (crown-free) road with the transaxle in neutral, the vehicle requires a noticeable torque input to the steering wheel to maintain a straight
path.
NOTE:
"Leads" and "pulls" are terms for the same condition with different levels of severity. Lead refers to the path deviation (usually a lane change in .2 miles
or less with hands removed from the steering wheel). Pull infers that torque is required at the steering wheel to maintain a straight path.
When performing a diagnostic ride for leads and pulls it should be done on a smooth, flat (crown-free) road. It is also important to repeat the road test in
each direction to eliminate crosswind affects. Road crown and crosswind induced leads and pulls are normal.
The left lead condition may be caused by one or all of the following:
^
Tire lead
^
Powertrain position in the vehicle
^
Wheel alignment
This condition may be repaired using the following procedure:
1.
Raise car on hoist.
2.
Remove both front wheels.
3.
Support transaxle with a transaxle jack.
IMPORTANT:
Do not use a screwjack under the lip of the transaxle pan. This could crush the transaxle pan gasket and result in transaxle oil leaks at a later date.
4.
Remove two upper transaxle mount nuts.
5.
Raise powertrain with transaxle jack approximately 6 mm.
