Front diff gear ratio

[chris.andros.18]

I need to know the gear ratio in my front diff of my truck an you know how to figure it out there is no plate on the diff to tell me and toyota can't tell me what it is without the plate

 

[chris.andros.18]

It's a 02 v6 sr5

 

[BlazeRunner]

Search. found these in under a minute
http://www.sonoransteel.com/include...eel/TechArticles/1996-2004ToyotaGearRatio.pdf
http://www.toyota-4runner.org/3rd-gen-t4rs/74886-axle-ratios.html

 

[white_n_slow]

There is a sticker on your door jamb that should give you a good indication of your gear ratio. More info: http://www.sonoransteel.com/include...eel/TechArticles/1996-2004ToyotaGearRatio.pdf

If that doesn't work, the tried and true method is the good 'ol spin test. https://www.youtube.com/watch?v=2y9iqvO7RaU

 

[4eigner]

Codes are unreliable. The most reliable way without counting the teeth on ring and pinion is to lift a wheel and spin it 20 times while counting the number of times the driveshaft rotates.
Put a decimal point between the tens and the ones place and you have your ratio.

 

[chris.andros.18]

Search. found these in under a minute
http://www.sonoransteel.com/include...eel/TechArticles/1996-2004ToyotaGearRatio.pdf
http://www.toyota-4runner.org/3rd-gen-t4rs/74886-axle-ratios.html

I don't understan it because it's saying I could be any of thoes gear ratios with that number I need to know the exact ratio not the 3 possible ones it could be

 

[BlazeRunner]

I don't understan it because it's saying I could be any of thoes gear ratios with that number I need to know the exact ratio not the 3 possible ones it could be

then pay attention to the other posts and try a spin test.

 

[D Farms]

another way is by comparing the rpms at a given speed. assuming a 265/70r16 tire. keep in mind that some of these gear ratios are only available with certain combinations of tire sizes drive trains and engine options.

so at 60mph
3.73 = 1732rpm
3.90 = 1811rpm
4.10 = 1904rpm
4.30 = 1997rpm
4.56 = 2118rpm

 

[4eigner]

another way is by comparing the rpms at a given speed. assuming a 265/70r16 tire. keep in mind that some of these gear ratios are only available with certain combinations of tire sizes drive trains and engine options.

so at 60mph
3.73 = 1732rpm
3.90 = 1811rpm
4.10 = 1904rpm
4.30 = 1997rpm
4.56 = 2118rpm

That's a great way as long as the speedometer and tachometer are both reading properly. I find that there's a disparity between my tach/speed gauges and the scangauge2 readings. Also, not all 265/70/16 tires are the same height. I've seen 1" differences between brands and worn vs new tires.

 

[chris.andros.18]

Ok I think I figured it out with the combination of the door code and spin test door code was A03 and spin test came up with 4 revolutions for every 1 turn of the tires so I believe it's a 4.10

 

[St Runner]

Or it is 3.9. You can't really tell if you only spin the tire 4 times. Spin the tire 20 times and count the revolutions of the driveshaft. Approximations are ok for some things but not this case.

 

[Brilliant]

Ok I think I figured it out with the combination of the door code and spin test door code was A03 and spin test came up with 4 revolutions for every 1 turn of the tires so I believe it's a 4.10

This doesn't tell you anything.

 

[chris.andros.18]

Or it is 3.9. You can't really tell if you only spin the tire 4 times. Spin the tire 20 times and count the revolutions of the driveshaft. Approximations are ok for some things but not this case.

I spun the tire 10 times and calculated it