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.
1990 GMC Forward Control 3.9 LFACTORY OEM SERVICE PROCEDURE
Torque Specifications
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) | ||
|---|---|---|---|
| Bellhousing-To-Engine Bolt | 40 (54) | ||
| Cross Lever Ball Stud | |||
| Bracket Side | 20 (27) | ||
| Engine Side | |||
| "G" Series | 40 (54) | ||
| "P" Series | 34 (46) | ||
| Pressure Plate Bolt | 30 (41) | ||
| Swivel Lock Nut | |||
| "G" Series | 32 (44) | ||
| "P" Series | 20 (27) | ||
| Transmission-To-Bellhousing Bolt | 75 (102) | ||
| Transmission-To-Mounting Bolt | 35 (48) | ||
Factory Service Tools
Use the Manual With the Right Hardware
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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.