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.
Drive Axle - Full Floating: Description
The 9 3/4" rear axle uses a conventional ring and pinion assembly to transmit the driving force of the engine to the rear wheels. The axle shaft is supported at wheel ends by wheel hubs. The bolts attaching shaft to hub also support the axle. The splined end of shaft is supported by differential.
Drive pinion is supported by 2 tapered roller bearings. Pinion depth is set by shims between inner pinion bearing cup and rear axle housing. Pinion bearing preload is set by shim pack at front of axle housing, between bearing cone and drive pinion (between yoke and pinion gear on 10 1/2" axle).
Differential case is supported in drive axle housing by 2 tapered roller bearings. Differential and ring gear are positioned in relation to drive pinion by using shims between bearings and differential case. To move ring gear, shims are removed from one side and an equal amount is added to the other side. Differential side bearing preload is set by drive axle housing.
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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.