i own an auto shop in az and have a excursion that has twisted the rear carrier housing up toward the rear seat and kinked the drive shaft..customer was driving on the street and stoped at a light. when he took off the axle housing twisted up has any body else seen this. it does have a lift about 6 in and is 4wd with 35 s

 

A couple of pics would be really helpful.

I have never heard of this but I have to believe it's from either *severe* abuse or an incorrectly installed lift. The running gear on an Ex is really beefy and there is just no way to easily do what you describe.

 

I have heard of this sort of thing, but on older axles with plug welded tubes not the more modern friction welded ones. This has actually been a concern on my truck, as the plug weld holes started showing signs of leaking.
I doubt gentle acceleration was the cause of this. More like hot sticky 35s, and punched it off the line.

 

Could he have had it in four wheel drive with the front hubs disconnected? That will put 2.7 times the normal torque to the rear axle.