Originally Posted by waldig
I owe Rob a beer for having made a guess at the solutition to the loose pin issue.
Turns out that the pin being loose indicates that the roll pin has sheared off, and that is probably caused by fatally galled spider gears and PIN.
I think I covered this in my first post, so do I get a beer as well?
Only one spider has to seize to the pin to shear the roll pin, if two pins seize then one or both of them will break free from the pin, shear the pin in half which is not likely or break gear teeth
When you turn the car or have one wheel going at a different speed -slipping- the spiders allow a difference in axle speeds. When one wheel spins on take off the spinning wheel is going at a greatly different speed and the spiders are whirrling way fast while carrying the torque of the rear wheels, thus heating and wearing on the drive PIN.
With one wheel slipping the diff is not seeing full torque, full torque is reached when the slipping wheel grabs. At that instant one spider slows down and the other speeds up, this is a tremendous shock load on all parts in the diff.
When the wheel grabs the spiders are forced against the pin and this is when galling may occur.
The spider that is whirling faster with wheel spin is not seeing a greater load than it would if both spiders were going at the same speed as it is not seeing full torque. Thus it will not wear or heat the pin more than normal.
Correct me if I'm wrong. Nobody has commented on my previous posts so am I to assume that they are correct as well?