GM 15938628 AXLE

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The inner ends of the driveaxles are equipped with sliding constant velocity (CV) joints, which are capable of both angular and axial motion.

The rear axle assembly is of the hypoid, semi-floating type, with a differential that allows the outer rear wheel to turn faster than the inner wheel when the vehicle goes around corners. The axleshafts are splined to the differential side gears, allowing for this speed difference. An optional locking limited-slip rear axle is available, functioning like a conventional differential but with multi-disc clutch packs to equalize wheel rotation in low-traction situations. For 4WD models, a fully independent front axle assembly comprises a differential and two driveaxles with inner and outer constant velocity (CV) joints. Before assuming axle issues, it's crucial to perform a thorough check of other potential causes, considering factors like road noise, tire conditions, and engine or transmission noise that may mimic axle problems. Overhauling the differential typically requires special tools and is not cost-effective for DIY work, with procedures limited to axleshaft-related tasks such as removal, installation, oil seal replacement, bearing replacement, or unit removal for professional repair or replacement.

Withdraw the pinion shaft part way, then rotate the differential until the shaft touches the case. Have an assistant push in on the outer flanged end of the axleshaft while you remove the C-lock from the groove in the inner end of the shaft.

After disconnecting the brake components and hoses, you should proceed to remove the brake drums.

To remove the hub cover, you can pry it off using a hammer and chisel. The driveaxle/hub nut should be removed and discarded.

The outer ends of the driveaxles are equipped with ball-and-cage type CV joints, which are capable of angular but not axial movement.

DIY work is limited to axleshaft-related tasks such as removal, installation, oil seal replacement, bearing replacement, or unit removal for professional repair or replacement.

If tapping the stub shaft with a hammer doesn't free it from the hub splines, you can push the driveaxle from the hub with a puller.

During the installation of the rear axle assembly, you should tighten the U-joint strap bolts to specific torque values, tighten all suspension fasteners to specific torque values, tighten the brake fasteners to specific torque values, bleed the brakes, install the wheels, and tighten the lug nuts to specific torque values.

Fill the differential with the specified lubricant.