What's My Gear Ratio?

[rcpd34]

Swapping rears and I'd like to know what gears are in the new one. What's the easiest way to figure it out?
Thanks!

 

[TheBeast_88K5]

Pull the diff cover and read the numbers...

 

[rcpd34]

Covers off, but I don't see any. Where should they be?

 

[NorCal_Chris]

rotate the ring gear untill you see em stamped on the gear.

 

[4X4HIGH]

Pull the diff cover and read the numbers...

If you want to be 100% sure don't just rely on what is stamped in as i've seen 1 set thus far that was stamped incorrectly. The ONLY way to know 100% for sure what gear ratio is in a diff is to pull the cover and count the teeth on both gears and divide the ring gear by the pinion gear.

 

[TheBeast_88K5]

Wow... I would be UBER-pissed, if my gears had more/less teeth than advertised.

 

[4X4HIGH]

Wow... I would be UBER-pissed, if my gears had more/less teeth than advertised.

Nobody is perfect, not even the machine that was programmed by a human.

 

[rcpd34]

Looks like I have 4:11's according to the stamp.
Thanks for all of the comments.

 

[tRustyK5]

What were the numbers on your ring gear?

 

[rcpd34]

Something like GM XX 4 1 1 1 573
Can't remember for sure.

 

[tRustyK5]

41 11 is 3.73's...

Common mistake, which was why I asked.

 

[rcpd34]

41 11 is 3.73's...

Common mistake, which was why I asked.

How much sense does THAT make ?!

 

[TheBeast_88K5]

41/11= 3.73

 

[tRustyK5]

Hah, 41 teeth on the ring gear. 11 teeth on the pinion gear...

41/11 = 3.73:1

10 bolts never got 4.11's (38/9), they do get 4.10's though (41/10) and 3.73's (41/11) and 3.42 (41/12) 3.08's (40/13)

Make sense? The ratio is stamped ring gear tooth count followed by pinion gear tooth count. You have to divide the two to get your ratio.