I want to know how to find my axle gear ratio, who knows the methods? :confused:

http://www.dirtroad.com/dgr.htm (http://)

Jack up the rear turn the drive shaft and count how many times the tires rotate(mark them so they are easier to count.)

oh yea fawkin search! :flipoff2:

Wes

will my rear 4.375 gears match close enough to work with my front with 4.27's?

Originally posted by TRed
will my rear 4.375 gears match close enough to work with my front with 4.27's?

I didn't say "Use the Search" like that Noooooob above :flipoff2: (at least he gave an answer :) ) for your first question.. Because, for grins, I tried myself and KNEW it wasn't easy to get (at least in the first 13 pages).

BUT... Your second question was just discussed about YESTERDAY...

USE THE SEARCH..!!

There I said it.

:flipoff2:

Originally posted by TRed
will my rear 4.375 gears match close enough to work with my front with 4.27's?

I don't know what axle you're checking on, but I don't believe any axle has such a gearset as 4.375. You may have calculated that based on rotations, but you need to look in an gearset chart to find the closest ratio available to what you counted. Degrees of rotation are kinda hard to eyeball. I know that I couldn't eyeball the difference between 1/4 and 3/8 of a turn of a driveshaft. Sounds like the rears are 4.27 also.:rolleyes:

Originally posted by CSP


I don't know what axle you're checking on, but I don't believe any axle has such a gearset as 4.375. You may have calculated that based on rotations, but you need to look in an gearset chart to find the closest ratio available to what you counted. Degrees of rotation are kinda hard to eyeball. I know that I couldn't eyeball the difference between 1/4 and 3/8 of a turn of a driveshaft. Sounds like the rears are 4.27 also.:rolleyes:

You may be right... BUT he also hasn't said what vehicle it's for. His profile shows Nissan. I know many Toyota's and Isuzu's have 4.30 gears available.

Divide the number of teeth on the ring gear by the number of teeth on the pinion gear. And one more thing














































Welcome :flipoff2: newbie:flipoff2:

the Tag? :rolleyes:

I deliberately did not mention what brand of truck I have, because after much SEARCHING through the old posts, I learned that mentioning Nissan leads to a ton of flack from people who are biased about that brand. I did count the rotation on the driveshaft, and after that I did research, that proved that only a few gear ratios were used in my axle for that year/model. The gears I have are definetly 4.375's, and thanks to all those who helped and welcomed this newbie. Now I am willing to move on and let this post drift into oblivion, but something tells me, that is not likely to happen.:flipoff2: