Joined
·
2,810 Posts
How do you figure out the rear gear ratio if it is not what the axle code numbers show? Does the gear ring have it stamped on or do you have count the teeth and use a formula?
A friend said his rear axle code decodes as a 2.56 gear posi (it's a 12-bolt). This isn't what he is running because he tachs over 3200 rpms when going 70mph. The trans is a TH350. Plus, I don't think 2.56 gears were put into 12-bolt posi rears. The rear is out of a '69 El Camino.
Can you guys tell us how to figure the gear ratio? Thanks a lot.
A friend said his rear axle code decodes as a 2.56 gear posi (it's a 12-bolt). This isn't what he is running because he tachs over 3200 rpms when going 70mph. The trans is a TH350. Plus, I don't think 2.56 gears were put into 12-bolt posi rears. The rear is out of a '69 El Camino.
Can you guys tell us how to figure the gear ratio? Thanks a lot.