Have the T up on the lift addressing different issues and decided to pull the rear axle cover to see the gears. Surprise 2.73's. I knew they were high ratio, but did not imagine. I turned the driveshaft and got about 1.4 turns x 2 = 2.8. I am shooting for something in the very low 2000 rpm range at 50 mph. I have found an on line calculator. The rear axle is a GM with 7.5" gears. It looks like 3.70 gears with my tires. I have a stock 302 Ford GT motor, C-4 trans and like mentioned a 7.5" gm rear axle. Rear tires are 315/70/15's, 32" tall. I do not do any road trips, Can you put 3.70s in a 2.73 rear with the right shim? I am open to any other advise you guys might want to offer.
thanks,
joe
thanks,
joe