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.
1995 GMC Forward Control 7.4 NFACTORY OEM SERVICE PROCEDURE
Pinion Clearance
- Disconnect motor field coil connector from solenoid "M" terminal, and insulate it carefully. Connect a battery from solenoid "S" terminal to solenoid frame. Momentarily flash a jumper lead from "M" terminal to solenoid frame.
- This shifts pinion into cranking position. Push pinion back toward commutator end to eliminate slack. Distance between pinion and pinion stop should be .010-.160" (.25-4.06 mm). See Fig 1. Clearance is not adjustable. If clearance is not within specification, check for worn parts.
Factory Service Tools
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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.