Suspension - Adjustable Rear Alignment
Number 84-3-11A Date 8/84Subject: ADJUSTABLE REAR ALIGNMENT ON FIERO
SUSPENSION ALIGNMENT SPECIFICATIONS:
"Please discard previous Bulletin 84-3-11 with above title due to correction in specifications on chart. This information also corrects the 1984 Fiero Service Manual Page 3A-4."
The Pontiac Fiero is designed with independent rear suspension that is service adjustable, making four-wheel alignment possible. This is different from all other Pontiac models, both FWD and RWD, which have solid rear axles with fixed alignment.
Rear wheel alignment on Fiero can be performed by backing the car onto a two-wheel aligner, or by using the new, more efficient four-wheel aligners some of which are illustrated in the GM dealer equipment catalog. If the vehicle must be backed onto alignment equipment and equipment does not compensate for rear toe measurements, toe-in will read on the equipment as toe-out.
Whenever a tire wear or handling condition is encountered, rear alignment should be measured and reset if necessary. Excessive toe-in or toe-out can cause irregular or premature wear. For best tire wear, toe-in should always be set to the low end of the specification.