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 MANUALSCHEVROLET1988STEP VAN P30, 7.4 W, AUTOMATIC, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)DRIVELINES & AXLESDIFFERENTIALS & DRIVE AXLESDRIVE AXLE - FULL FLOATINGOVERHAULAXLE ASSEMBLYREASSEMBLY & ADJUSTMENTS
1988 Chevrolet Step Van P30, 7.4 W, Automatic, 400/M40
Reassembly & Adjustments
1988 Chevrolet Step Van P30, 7.4 W, Automatic, 400/M40SECTION Reassembly & Adjustments
- When reassembling and adjusting ring and pinion assembly, pinion depth, pinion bearing preload, side bearing preload and backlash between ring and pinion must be adjusted.
- If only pinion shaft and ring gear are to be replaced and carrier housing can be reused, compare pinion depth adjustment numbers etched in faces of old and new pinion heads. See Fig 1 . Using the PINION DEPTH SHIM ADJUSTMENT chart, correct shims can be selected for new pinion shaft depth adjustment.
RENDER: 1.0x
NO RELATED
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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.