just read about the pro gear. Isn't it for race only? I mean it is softer material for hard launches. But i am also travelling with those gears 200 and more miles each direction 5 to 7 times a year to the races. and back. Don't they wear out quickly?
I ran pro gears in my dana 17 years behind a 4 speed. never wore out, back lash stayed the same.75-90 gear oil is what I used. this was 3400 # car on slicks.