Grrrrhhhh!!!!!!!!!!

Never jack on the pumpkin...

The rear axle is not perfectly straight. To allow the rear end to track correctly, there is about a 1 degree negative camber built into the rear axle. Basically what that means is that instead of axle being parallel with the ground, the differential is a little lower than the center line and the the top of the wheels tilt slightly towards the vehicle.
If you lift the vehicle from the differential, you are putting stress on both left and right axle housings where they meet the differential, at the same time. They were not designed to perform in this manner. Although you may not break anything, you do not want to stress this area or slightly tweak it and remove or reduce this 1 degree negative camber.

http://www.bullittarchive.com/html/modules/articles/article.php?id=76

I used GM axle lube with a bottle of limited slip additive when I upgraded my rear end.

mity2 said:

I've read that befor. So then where do I jack up the rear of car so that both wheel is ff of ground ??

Click to expand...

Follow the link I posted to find out...