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 MANUALSCHEVROLET1985STEP VAN P20, 4.8 T, AUTOMATIC, 475/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)DRIVELINES & AXLESDIFFERENTIALS & DRIVE AXLESDRIVE AXLE - 12"OVERHAULDISASSEMBLYCASE & GEAR ASSEMBLY
1985 Chevrolet Step Van P20, 4.8 T, Automatic, 475/M40
Case & Gear Assembly
1985 Chevrolet Step Van P20, 4.8 T, Automatic, 475/M40SECTION Case & Gear Assembly
- With carrier in holding fixture, loosen jam nuts and back off thrust adjusting screw. Center punch 1 differential carrier leg and bearing cap to identify for reassembly.
- Remove differential adjusting nut locks and bearing cap bolts. Mark bearing caps and carrier for reassembly. Remove adjusting nuts and bearing caps. Remove differential and ring gear assembly from carrier.
- Mark differential case halves for reassembly. Remove bolts and separate case halves. Remove spider, pinions, side gears, and thrust washers. If necessary, remove rivets and separate gear and case.
RENDER: 1.0x
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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.