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 MANUALSCHEVROLET1985PICKUP C20, 2D PICKUP, 4.8 TREPAIR AND DIAGNOSISDRIVELINES & AXLESDIFFERENTIALS & DRIVE AXLESDRIVE AXLE - 10.5"DRIVE AXLE SPECIFICATIONS
1985 Chevrolet Pickup C20, 2D Pickup, 4.8 T
Drive Axle Specifications
1985 Chevrolet Pickup C20, 2D Pickup, 4.8 TSECTION Drive Axle Specifications
PINION DEPTH CODES
| Original Code | Service Code | Correction In. (mm) |
|---|---|---|
| +2 | +2 | 0 (0) |
| +2 | +1 | -.001 (-.025) |
| +2 | 0 | -.002 (-.005) |
| +2 | -1 | -.003 (-.008) |
| +2 | -2 | -.004 (-.10) |
| +1 | +2 | +.001 (+.025) |
| +1 | +1 | 0 (0) |
| +1 | 0 | -.001 (-.025) |
| +1 | -1 | -.002 (-.005) |
| +1 | -2 | -.003 (-.008) |
| 0 | +2 | +.002 (+.005) |
| 0 | +1 | +.001 (+.025) |
| 0 | 0 | 0 (0) |
| 0 | -1 | -.001 (-.025) |
| 0 | -2 | -.002 (-.005) |
| -1 | +2 | +.003 (+.008) |
| -1 | +1 | +.002 (+.005) |
| -1 | 0 | +.001 (+.025) |
| -1 | -1 | 0 (0) |
| -1 | -2 | -.001 (-.025) |
| -2 | +2 | +.004 (+.10) |
| -2 | +1 | +.003 (+.008) |
| -2 | 0 | +.002 (+.005) |
| -2 | -1 | +.001 (+.025) |
| -2 | -2 | 0 (0) |
AXLE ASSEMBLY SPECIFICATIONS
| Application | Measurement In. (mm) | |
|---|---|---|
| Ring Gear Backlash | ||
| Preferred | .005-.008 (.13-.20) | |
| Acceptable | .003-.012 (.008-.30) | |
| INCH Lbs. (N.m) | ||
| Pinion Bearing Preload | ||
| New Bearings | 23-35 (2.6-4.0) | |
| Used Bearings | 5-15 (.6-1.7) | |
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.