How to tell what gears you have?


#1

Say if you bought 4.10 gears for your Mustang, but the seller didn’t know they were 4.10 gears, how would you go about finding out?

I know you can count the teeth on the gears, but what’s the correlation between that and determining what the final would be?


#2

of teeth on the ring gear / # of teeth on the pinion

also the ratio is usually stamped somewhere on them as well