Author Topic: rear end gear (Read 1466 times)

pink panther · « **on:** July 05, 2013 - 08:13:06 PM »

I read on here before that you can spin your rear tire and count the drive shaft rotation to tell what gear is in the car, I always suspected a very low gear based on RPM at highway speed. I decided to jack up the rear end while I was changing the oil todAY. drive shaft turned 3 3/4 times t0 4 times per one full turn of the rear wheel. what do you think the gear is?

Bullitt- · « **Reply #1 on:** July 05, 2013 - 09:11:52 PM »

Is it an 8 3/4 Mopar rear? if so 3.73 is closest......Dana rear lists a 3.73 also

I had performed this test more than once & also calculated based on RPM at speed & was convinced I had 3.55s, turned out to be 3.23s

pink panther · « **Reply #2 on:** July 05, 2013 - 09:36:55 PM »

Yes 8 3/4

Chryco Psycho · « **Reply #3 on:** July 06, 2013 - 05:49:53 PM »

was the other tire blocked or on the ground so it would not move
do you have a sure grip ?
did both tires turn equally ?

pink panther · « **Reply #4 on:** July 06, 2013 - 06:00:49 PM »

Both tires off the ground, yes it sure grip

Chryco Psycho · « **Reply #5 on:** July 06, 2013 - 10:40:11 PM »

as long as both tires do not hang up on the brakes & turn easily it should be accurate , if it is exactly 3.75 turns it will be 3.73 which is not available from Moper only aftermarket , if it is closer to 4 turns I would bet on 3.91 ratio .

Author Topic: rear end gear (Read 1466 times)

pink panther

rear end gear

Bullitt-

Re: rear end gear

pink panther

Re: rear end gear

Chryco Psycho

Re: rear end gear

pink panther

Re: rear end gear

Chryco Psycho

Re: rear end gear