i have 2 trannys, and 1 car... but both have royal purple 80-90 in them, and both work good.. i curently have the 323gt tranny in my car, and it has about 160,000 miles on it and has had 80-90 for over 6 years in it, even when it was in the 323 ...my stock tranny has 78,000 on it.. but im waiting till i crap out this 323 one before i put my stocker back in.... i had polished the 323 one, so when i did the clutch i swapped trannys too.... im gonna polish the capri one and keep it on a shelf.. til im building too much power for the 323 one and it gives... then im gonna detune the car a bit and put the nice low mileage one in and be done for a while....