K24madness

I have had the car in the air and all 4 wheels spin but it seems that the back just goes up in smoke under full power in 2nd gear. I do feel the front end pull at first into a corner under full throttle then the back end steps out hard. I had Viper Bob install a gaurds (spelling) rear posi diff to help keep the car pointed straight but its still a hand full. I know the center diff is working the question is how well. Bob found that I smoked the rear diff. I wonder if the center is failing as well.

Thoughts????