Re: Change diff gearing?
s-pak, you could have a 3.25 the higher the tire and rim combo the lower the rpm.
I would find out what ratio you have: Jack the car up and mark a point on the tire at the top and a mark on the tail shaft.
Turn the the tire around until the mark on the tail shaft has made one complete turn.
Remember how many turns your tire has gone around, if you went 3 * you have a 3.00, if you went 3 and 1/4 you have 3.25 etc
Do the test a few times to make sure, let me know your results.
While the car is up test your LSD with a torque wrench, one wheel off the ground the other fixed on the ground, see how much it takes to turn the wheel off the ground you'll soon know if you have a good LSD or need it adjusted. Some people think they have a single spinner when they actually have an LSD with no clutches left or not tightended up.