Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSPONTIAC1988FIREBIRD BASE, 5.0 E, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)DRIVELINES & AXLESDRIVESHAFT & UNIVERSAL JOINTSDRIVE AXLESCHECKING & ADJUSTINGADJUSTINGTRANSMISSION SHIMMING
1988 Pontiac Firebird Base, 5.0 E, Standard
Transmission Shimming
1988 Pontiac Firebird Base, 5.0 E, StandardSECTION Transmission Shimming
Adding 1 shim to transmission mount will decrease front angle 1/2 degree and will increase rear angle 1/4 degree. Removing 1 shim will increase front angle 1/2 degree and decrease rear angle 1/4 degree.
NOTE:
Production bolt is M10-1.5 x 35 mm. When using 2 or more shims, an M10-1.5 x 50 mm bolt must be used.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.