Time to do a bit of troubleshooting. Start by verifying that the driveshaft is actually turning, and that the axles are not. Once you have verified that the problem is in fact the rear, remove the cover and observe with a helper. Watch the inside of the rear while a helper puts some load on the drivetrain (run the engine and attempt to move the car) - make sure to block the wheels and lock the brakes so that the car does not actually move and injure you!
The possibilities are:
- the yoke could be cracked or stripped. In this case, the driveshaft and yoke will turn, but the ring gear will not.
- side gears could be cracked. In this case, the ring and pinion gears will turn but the axles will not.
- side gears could have stripped splines. Same as being cracked.
- Axle splines could be stripped. Everything will seem to turn normally, but the axles will not turn.
Since these are all direct mechanical connections, something has to be stripped or cracked. Don't overlook missing or broken teeth on the ring gear.
Monday, May 25th, 2009 AT 8:07 AM