after this question about posi's i wont ask anohter about it

[MITCH1914]

i need feedback on this. i think my truck may have a worn out posi. when i lift the truck up and turn the tires they turn opposite directions. when i play on the street and tap it from time to time both tires turn and chirp, but when i nail it only one tire breaks loose. so what gives do i have a posi that is worn out or do i have an open that turns both tires from time to time.

also when i go to the drag strip i have rubber inside of both wheel wells.

after this i will either buy new clutches or a protrack unit.

thanks

68 chevy C10 3.73