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 MANUALSGMC1983VALUE VAN P2500, 6.2 J, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)DRIVELINES & AXLESDIFFERENTIALS & DRIVE AXLESDRIVE AXLE - 10.5"OVERHAULREASSEMBLY & ADJUSTMENTBACKLASH & FINAL ASSEMBLY
1983 GMC Value Van P2500, 6.2 J, Standard
Backlash & Final Assembly
1983 GMC Value Van P2500, 6.2 J, StandardSECTION Backlash & Final Assembly
- Place lubricated bearing cups onto differential side bearings and place differential assembly into carrier. Install bearing caps in their original positions. Tighten cap bolts until just snug.
- Loosen right side bearing adjusting nut, and tighten left side adjusting nut until zero backlash is obtained. Back off left adjusting nut 2 slots to a locking position.
- Tighten right adjusting nut until case is in firm contact with left adjusting nut. Loosen right adjusting nut until it is free of bearing. Retighten nut until it just contacts bearing. Tighten right adjusting nut additional 2 slots (used bearings) or 3 slots (new bearings) to properly preload differential side bearings.
- Using a dial indicator, measure ring gear backlash in at least 4 locations around ring gear. Adjust to specifications by moving adjusting nuts in or out as necessary. If 1 adjusting nut is loosened, the other nut must be tightened an equal amount to maintain side bearing preload.
- With backlash adjustment complete, install adjusting nut lock fingers into slots in nuts, and attach fingers to bearing caps. Tighten bearing cap bolts, and perform gear tooth contact pattern check. Install axle housing cover.
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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.