Crsytal Ice

hey, im trying to calculate the gears in my jeep, does anyone kno how to so this but just spinning the tire and watching the revolutions of the tire and on teh driveshaft?...i kno there is a way, i just dont kno how to do it. if anyone could help me out that would b great.

thanks.

sprostang

Easiest way. Spin tire one revolution, count how many times the driveshaft turns.

Examples....... 3 1/4 turns=3.27`s
3 1/2 turns= 3.55`s
3 3/4 turns= 3.73`s etc........

Crsytal Ice

by that method i has 1.55's......and i kno thats not right, i turned the wheel one revolution and the shaft turn 1.5 times.......

sprostang

Now that aint right. I bet it has 3.55`s. Can you read the tag on the diff cover?

threeg502

You might need helpers to spin both tires equally. Your differential will throw off the number otherwise. It's doin' a one wheel peal!
Each of you mark a tire

Crsytal Ice

good point bout the diff, and no i cant read the cover of the diff, plus the 31" tires play a part too

Colorado_Mustang

You might try turning the driveshaft with both rear tires off the ground. They should spin fairly equally unless you have a dragging brake or bad bearing.