Differential Rebuild Eric Shogren Rachel dEntremont Greg Jones
Differential Rebuild Eric Shogren Rachel d’Entremont Greg Jones Walker Crosby Tom Roberts & host of others!
Tools Must Haves n n n Patience Rear Spring Spreader Large jack stands Seal driver Nice to Have n Inch-pound torque wrench
Why? Noise – often mistaken for Transmission noise n Four types w w n n Drive Noise Cost Noise Float Noise Bearing Noise Worn pinion/ring gear first three – makes a whine Worn bears – low growl. Sound like a pump try to pump rocks Broken Pinion Gear Teeth
Basic Steps Remove rear axle/drive shaft Disassembly Inspection Bearing preload n n Carrier bearings Pinion bearings Reassembly Reinstallation
Remove Rear Axle/Drive Shaft Support the car via the frame – your pulling the rear axle n Rear of the car needs to be higher – meaning more dangerous!
Remove Rear Axle/Drive Shaft Remove n n n Wheels Brake backing plates U-Joint housing Shock Links Speedo cable Install spring spreader Support banjo on Jack Remove Spring Shackles n Support the front end of the torque tube
Disassembly Remove the drivers side axle housing from banjo Pull axle and carrier out Remove torque tube n n n Remove torque tube roller bear race and grease seal Place a 1 -116 inch, 1/2 drive, socket over the spline end of the drive shaft. Slide the torque tube down over the drive shaft until it seats against the end of the socket. Hold the torque tube in a vertical position and gently bounce it up and down until the socket pushes the grease seal and roller bearing race out the end of the torque tube.
Disassembly Before disassembling carrier make sure everything is marked for re-assembly
Disassembly A Handy Jig
Disassembly
Disassembly
Disassembly • Removing pinion bearing double conical race • Also drive our axle housing races
Inspection – what you don’t want to find
Bearing Preload- prep
Bearing Preload - prep Install bearing on carrier Should be pressed on, but a rubber mallet works too Install races in axle housing and banjo n n Keep races in freezer & heat housings Best to press them in, but if all else fails – the old rubber mallet again Assemble carrier without axles
Bearing Preload - prep Installing 1 st pinion bearing
Bearing Preload As Rachel says this requires: • Assembling 481 times • Disassembling 482 times
Bearing Preload Pinion bearing preload is easier n n n Preload done with 2 thin locking nuts 1 1/16 th inch socket on end of drive shaft with an inch-pound torque wrench Spec: 20 in-lbs
Reassembly Install 3 grease seals Install drive shaft roller bearing race Assemble carrier with axles n Torque carrier nuts to 35 ft-lbs & lock wire Reassemble axle housing with the right gaskets combo & without sealant (changes dimensions) torquing nuts to 35 ft-lbs
Reassembly Install drive shaft roller bearing race Install torque tube torquing nuts to 35 ft-lbs and lock wiring Install roller bearing, speedo gear & lock ring Paint
Reinstallation Insert drive shaft into U-Joint Install shackles between spring and spring perches Install U-Joint housing – 1 whole tube of grease Install brake backing plates & brake rods Fill with 600 w until it runs out fill hole.
- Slides: 21