Finding gear ratios on your gears

[snorkleman]

Well, this was talked about in another thread so I thought I would add it here.

Did you find some gears or run across some gears at a junkyard and want to know the gear ratio. Well the easy way to tell is to count the teeth. Count the ring gear teeth and divide by the pinion gear teeth.

5.29 gears
37 ring gear teeth
7 pinion gear teeth
37/7= 5.285... or 5.29 rounded up

4.10 gears
41 ring gear teeth
10 pinion gear teeth
41/10 = 4.10 gear

Basically what this translates to is how many revolutions the pinion gear makes for one revolution of the ring gear. For instance in 5.29 gears the pinion gear will turn 5.29 times for every 1 turn of the ring gear.

[bucketofbolts]

good to know im planning on getting gears

[DYNNOMMYTE]

This is one of the most time consuming jobs to do at the wrecking yard.
I have been told that there are different colour codes for the ratios in the bore of the flange visible when the D/S is removed.
There is also the axle code chart, useful if you can find the axle code.

Your best bet, and most accurate ( due to modifications and repairs ) is to pull the thirds out of the axles and look for the tooth count on the ring.


But thats just my 2 cents....



here is the link for the axle code chart ( which I also found on this site, so I'm only repeating some of the info...
www.toysport.com/Technical%20Information/Toyota%20Differentials%20Identifications.htm