Hello all,
First I would like to thank you for your replies and suggestions.
What about the following theory:
I just discovered that the screw, which holds the rear metal tension rod (E0145) on the chassis was broken and missing (even if I had a longer one with 2 SN3 nuts with 271 loctite). Could this result to a super stable rear end, which does not turn and causes the car to understeer and a front end, which spins all the time, causes the center diff to get fried (instead of having something binding in the rear and cause the same thing)?
//BR
Dimitris