Was wondering if you could have to much pinion angle ?
lets say -8 degrees

 

Yes

Pinion abgle is the difference between the angle of the driveshaft and the abgle of the pinion.

The greater the angle, the more stress is put on the u-joint. Typical normal driving needs to be a close to zero as possible. Only on hard accelleration does the pinion need to be slightly down so the torque forces it up to zero.

The goal is to have it adjusted so when it'sused the most, it's at zero. In a drag car this can be around 5*. In a street car 2-3* is all it needs.

Any more and you'll have driveline vibrations and wear out the u-joint quickly.