1980 Rear Axle
#1
1980 Rear Axle
I got a rear axle from a 1980 Donor car. according to Nastyz28.com it has a 2.53:1 rear axle ratio. I'm planning to change it out to a 3.73 or a 4.10 rear end. The only problem is, I don't know if it is a 7.5 and 8.5. It had a 305 V8, Turbo 350 trans, and like i said a 2.53 "locking" rear axle. I was wondering if anyone knew what size the rear axle was.
#4
#7
RE: 1980 Rear Axle
That would be the most logical choice lol but I want to get the parts so that way I don't have to have everything sitting around waiting for the parts. A.K.A. I'm lazy lol. I think it's an 8.5 as far as that website went, but there is also an 8.2" that was used for the Second Gen.
#10
RE: 1980 Rear Axle
You don't have a 3 series and it should be an 8.5" ring gear. If You're going to change it out any way, then pull the rear cover, Count the teeth on the ring gear and the pinion gear and devide the larger number ( ring gear ) by the smaller number ( pinion gear ) and waalah, gear ratio is revealed. It's a good idea for anyone that's unsure and with a new gasket and gear oil, You can get a gear oil change at the same time.