No such ratio available for the 9 bolt. Its either 2.77, 3.07, 3.27, 3.45, or if you are incredibly lucky 3.70. Thats all GM ever offered stock for the nine bolt. Even if it you swapped them to a holden gear set there never was a 3.77 but its possible to get a 3.90 or a 4.10/11
Regardless i think they suck and it aint cuz I didnt give them a chance. I've run plenty. My 89 IROC 1LE R7U GM Motorsport ex Players Challenge car still has the stock 9 bolt though and it still works although the posi is puked ( big surprise )
