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 MANUALSGMC1986VALUE VAN P2500, 5.7 M, AUTOMATIC, 475/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONMANUAL TRANSOVERHAUL - GM 117 4-SPEEDCLEANING & INSPECTION
1986 GMC Value Van P2500, 5.7 M, Automatic, 475/M40
Cleaning & Inspection
1986 GMC Value Van P2500, 5.7 M, Automatic, 475/M40SECTION Cleaning & Inspection
- Wash case and all internal parts in solvent and dry with compressed air. Check all parts for damage or excessive wear. Check bearings and synchronizers for rough operation. File off any burrs on mating surfaces. Replace damaged parts as necessary.
- Check reverse idler gear bearing bushing for wear. Clearance between bushing and shaft should be at most .004" (.10 mm). If clearance is not as specified, install NEW bushing and gear assembly.
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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.