Help me identify diff ratio please!!!

[Slugsie]

OK, after a lot of struggle, I've finally managed to get my hands on a second hand front diff for my 3ltr. Before I remove the old diff from the car, I thought I'd best check the new one out, so I cracked it open. Looks good inside, but I have a feeling that it's the wrong ratio.

OK, not up to the technical details of the names of the bits, but...

Big gear (Ring?) has 43 teeth,
Medium sized gears (??) have 16 teeth
Small gears (Pinion?) have 10 teeth
Input gear (??) has 10 teeth


To me that makes it a 4.3:1 drive. Which is a b*gg*er as the one on at the moment is a 4.1:1 (according to the Axle code G294 anyway). Axle code also appears to suggest I have a 4 pinion diff, and this one appears to be a 2 pinion diff.

So, I guess this diff is no good for me?

Of course, I haven't 100% confirmed what is broken on the old diff, I just snapped this one up as it was available.

[Gizmo]

Hi Paul, your correct in saying 4.10 with 4 pinion for the code G294.
Have a look at these sites for info

http://www.brian894x4.com/Gearratiosanddiffs.html
http://home.4x4wire.com/erik/diffs/
http://toyota.off-road.com/toyota/ar....jsp?id=274535
http://www.4crawler.com/4x4/4R_TechI...tml#DiffRatios

[Gamedawn]

Don't worry about the 4 pinion bit - that refers to the rear diff. The fronts are all the same (apart from the ratio)

[The Lovely Boyo]

Slugsie, have a look at the pdf on the home page -

files - technical mechanical

good exploded drawing of diffs.

[Slugsie]

Cheers guys, thanks for the links etc.

The problem is, as I don't know the correct terms for each of the gears, I'm not certain I'm working out the ratio correctly. Can someone who knows confirm that I have a 4.3:1 diff, and that that makes it virtually useless for fixing a (potential) problem with a 4.1:1 diff?

[Gamedawn]

You certainly seem to have worked it out ok - it should be:-

Teeth on ring gear
Teeth on input gear

so in your case 43/10 = 4.3:1