Gear Ratio Identification???

[rallybru310]

Greetings,

How can I identify what gear ratio a given rear end or transmission might have without looking internally?

Thanks, Gibby

[ferp420]

there should be a tag on it that has the gear ratio and if its a lsd diff maybe 2 tags one would be a sticker and one a metal tag atached to one of the bolts on the rear of the housing and would have #s stamped on it

Edited April 6, 2020 by ferp420

[rallybru310]

I don’t see any tags or stickers on three different drivetrains, one of which I’m sure is all original with only 82,000 miles. Im swapping MT4 for MT5 and want to ensure they are geared the same. Any other suggestions?

[ferp420]

if the metal tag is gone your gona have to open them up it shouldent be a issue if there all sitting in front of you the gear ratio is stamped on the ring gear or maybe it was.the teeth count thay stamped on the gear ether way thats were it is

some times there is mud covering the sticker

[carfreak85]

You don't have to open up anything, just count the turns as you turn the trans input shaft or rear diff prop shaft flange.

[ferp420]

On 4/6/2020 at 3:37 PM, carfreak85 said:

You don't have to open up anything, just count the turns as you turn the trans input shaft or rear diff prop shaft flange.

the ratios are to close to go that route in my opinion anyway 4 bolts and you know for sure no big deal if there on the bench already

Edited April 11, 2020 by ferp420