how do u tell what size gears im running in my axle. I Read somewhere u divide the two numbers on the ring gear.
How can I tell what gear ratio I have?
- Thread starter Sgkologiski
- Start date
Usually there is a marking on the outside of the differential hosing with numbers on it. Can you look and see?
Those are 4.10's, 41 teeth on ring and 10 on pinion.
www.demandaam.com
To Determine Gear Ratio | American Axle & Manufacturing | Aftermarket OE Parts
Count the number of teeth on the pinion gear and count the number of teeth on the ring gear. Divide the ring gear teeth number by the number of teeth on the pinion. The result is your gear ratio.Exa
Last edited:
Alot depends on what your doing with your JK, just a DD the 3.21's will be good for the MPG's. If your going to be doing alot of Off Roading then the 4.10's would work better for you.
In my experience and reading here, I would go with the 4.10s. With 33s you will have good power with an auto and more with a stick. Also depending on your lift, you might be ok with 35s. You won’t be disappointed.