Anyone have 3.42 gear ratio?
09-26-2010, 06:44 PM
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Anyone have 3.42 gear ratio?
The axle code on my 02 sr5 is A01A which means I have a 3.42 gear ratio. This seems to be uncommon looking at others gears' on the forum. Does anyone have this gear ratio and if so what has been your experience with tire size upgrades? I'm thinking of going to 32s.
09-26-2010, 07:30 PM
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I've never heard of 3.42s...but I have an 01 SR5 auto on 33's that gets MUCH worse mileage than the other 3rd Gens on 33's so maybe I do have 3.42's...interested in input from others...
09-27-2010, 02:05 PM
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LINY: Find out your axle code on your driver side door frame.. im interested to see what gear ratio you have because our 4runners look similar stock. What kind of gas mileage are you getting with your 33s?
09-27-2010, 02:20 PM
#5
DO NOT rely on the axle code printed on your door jam to determine your gear ratio. This code has been found by many to be incorrect.
Stock gearing on an '02 4Runner, is either going to be 3.90s or 4.10s.
To know with 100% certainy, open your diff and count the teeth. Otherwise, this method may work for you:
Stock gearing on an '02 4Runner, is either going to be 3.90s or 4.10s.
To know with 100% certainy, open your diff and count the teeth. Otherwise, this method may work for you:
Jack up your vehicle so 1 rear tire is off the ground. Put your vehicle in neutral. Mark the drivshaft universal with a felt pen or anything really.Put a mark on the lifted wheel at 12 oclock. Rotate the wheel so the driveshaft turns. Count how many revolutions the driveshaft makes by turning the wheel 1 revolution. If you mark your driveshaft so the mark is at 12 oclock and also the tire marked at 12 oclock. You should be able to determine your gear ratio fairly acurately. Example...If your driveshaft rotates just over 4 revolutions per 1 revolution of the wheel. Its 4.10/1
09-27-2010, 02:27 PM
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09-27-2010, 06:11 PM
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The above method of counting rotations is nearly foolproof. But if you don't have a jack to do it safely, providing the VIN to the nearest dealer will net your answer...
Or perhaps the following link could answer your question (or at least start you off on the right path).
http://www.brian894x4.com/Gearratiosanddiffs.html
was found typing "4runner gear ratio" into google- found an old posting on YT that resulted in this posting...
good luck!
Or perhaps the following link could answer your question (or at least start you off on the right path).
http://www.brian894x4.com/Gearratiosanddiffs.html
was found typing "4runner gear ratio" into google- found an old posting on YT that resulted in this posting...
good luck!
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09-27-2010, 06:24 PM
#8
It's not something I looked up...I was told this by talking with techs at Toyota years ago. I've owned 4Runners for the last 10yrs now. Now that you mention it, IIRC, 3.73 is even a gear option too...but that's a rare ratio to have for an '02, I don't think I've ever seen an '02 w/ it (Liny you may have that ratio.)
If I recall, toyota's never made a 3.42 gear for a full size suv. Maybe in an older model toy, but not an '02 4Runner.
FWIW, I've personally known guys to pull their axle code from the door jam, compare it to multiple charts online, just to find out that's not the gear in their axle upon tear down. I've also seen guys buy gears from the dealer, based solely on the VIN of their 4Runner and still get the wrong ratio! For some reason, informing the customer the correct gear ratio in their 4Runner, was one area toyota really dropped the ball in. Just saying, any chart you find online, take it with a grain of salt.
I'll see if I can find something online that may hold some more weight than my .02 cents.
EDIT: This may be of some help:
1. http://www.top4runners.com/runhist/3...02_4runner.pdf
2. http://www.top4runners.com/runhist/3rdgen/2002specs.pdf
If I recall, toyota's never made a 3.42 gear for a full size suv. Maybe in an older model toy, but not an '02 4Runner.
FWIW, I've personally known guys to pull their axle code from the door jam, compare it to multiple charts online, just to find out that's not the gear in their axle upon tear down. I've also seen guys buy gears from the dealer, based solely on the VIN of their 4Runner and still get the wrong ratio! For some reason, informing the customer the correct gear ratio in their 4Runner, was one area toyota really dropped the ball in. Just saying, any chart you find online, take it with a grain of salt.
I'll see if I can find something online that may hold some more weight than my .02 cents.
EDIT: This may be of some help:
1. http://www.top4runners.com/runhist/3...02_4runner.pdf
2. http://www.top4runners.com/runhist/3rdgen/2002specs.pdf
Last edited by Rock Slide; 09-27-2010 at 06:30 PM.
09-27-2010, 07:10 PM
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Or perhaps the following link could answer your question (or at least start you off on the right path).
http://www.brian894x4.com/Gearratiosanddiffs.html
was found typing "4runner gear ratio" into google- found an old posting on YT that resulted in this posting...
good luck!
numbers for second column (copied from the website)..
01 = 3.42
02 = 3.58
03 = 4.10
04 = 4.56
05 = 3.15
06 = 3.91
07 = 4.30*
Rock Slide: Your article says this...
"Differential Ratio
2WD/4WD 3.727*/3.909*
*4.100 with optional P265/70 R16 tire package (standard on Limited)"
09-28-2010, 04:09 AM
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The above method of counting rotations is nearly foolproof. But if you don't have a jack to do it safely, providing the VIN to the nearest dealer will net your answer...
Or perhaps the following link could answer your question (or at least start you off on the right path).
http://www.brian894x4.com/Gearratiosanddiffs.html
was found typing "4runner gear ratio" into google- found an old posting on YT that resulted in this posting...
good luck!
Or perhaps the following link could answer your question (or at least start you off on the right path).
http://www.brian894x4.com/Gearratiosanddiffs.html
was found typing "4runner gear ratio" into google- found an old posting on YT that resulted in this posting...
good luck!
Seriously, search the forums (here and toyota-4runner.org) and you will find alot of people for whom all the tables were wrong. Don't trust them. Just lift a wheel and count the rotations like rockslide posted. It is super easy and can be done with just the stock jack.
09-28-2010, 09:16 AM
#11
FYI, this article got mine wrong. I have A04A and it's a 4.30 (article says 4.56). I lifted a wheel and counted the rotations, so I know for sure what I have. FWIW, no table ever told me that I had a 4.3, there was one that gave 4.3 as one of 3 options for my axle code, but none actually got it right.
Seriously, search the forums (here and toyota-4runner.org) and you will find alot of people for whom all the tables were wrong. Don't trust them. Just lift a wheel and count the rotations like rockslide posted. It is super easy and can be done with just the stock jack.
Seriously, search the forums (here and toyota-4runner.org) and you will find alot of people for whom all the tables were wrong. Don't trust them. Just lift a wheel and count the rotations like rockslide posted. It is super easy and can be done with just the stock jack.
Csefiroth0, 3.42 may have been a gear ratio on early '90 toy pickups, but that's way to high of gear ratio to be put into an '02 3rd gen 4Runner auto weighing in at almost 5K lbs. IIRC, the links I posted are actual Toyota literature...not info someone just typed up. Again, lift a rear wheel and count the rotations of the driveshaft to know within 99% of what gear ratio you have.
09-28-2010, 01:18 PM
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Thanks for posting Nelsonmd. This is exactly what I'm referring too...and this is just one of many testamonies I've seen where the code was incorrect.
Csefiroth0, 3.42 may have been a gear ratio on early '90 toy pickups, but that's way to high of gear ratio to be put into an '02 3rd gen 4Runner auto weighing in at almost 5K lbs. IIRC, the links I posted are actual Toyota literature...not info someone just typed up. Again, lift a rear wheel and count the rotations of the driveshaft to know within 99% of what gear ratio you have.
Csefiroth0, 3.42 may have been a gear ratio on early '90 toy pickups, but that's way to high of gear ratio to be put into an '02 3rd gen 4Runner auto weighing in at almost 5K lbs. IIRC, the links I posted are actual Toyota literature...not info someone just typed up. Again, lift a rear wheel and count the rotations of the driveshaft to know within 99% of what gear ratio you have.
09-28-2010, 03:09 PM
#13
Sure thing.
I wish it was as easy as reading the axle code to know what gears you have (which makes sense), but it ain't.
And when you do the tire rotation test, don't just do it once...do it at least 3 times. You've already got the tire jacked up, so a couple extra tests can't hurt. Just gives you more confirmation is all.
BTW, is your 4Runner 2wd or 4wd? 16" wheels too correct?
I wish it was as easy as reading the axle code to know what gears you have (which makes sense), but it ain't.
And when you do the tire rotation test, don't just do it once...do it at least 3 times. You've already got the tire jacked up, so a couple extra tests can't hurt. Just gives you more confirmation is all.
BTW, is your 4Runner 2wd or 4wd? 16" wheels too correct?
Last edited by Rock Slide; 09-28-2010 at 03:11 PM.
09-28-2010, 03:14 PM
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hmm..maybe i should do this to my '92 4runner....just to be sure.
VIN says 4.56's..but it was owned by a toyota junkie..so he might have regeared it for the 33's
VIN says 4.56's..but it was owned by a toyota junkie..so he might have regeared it for the 33's
09-29-2010, 07:43 AM
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Sure thing.
I wish it was as easy as reading the axle code to know what gears you have (which makes sense), but it ain't.
And when you do the tire rotation test, don't just do it once...do it at least 3 times. You've already got the tire jacked up, so a couple extra tests can't hurt. Just gives you more confirmation is all.
BTW, is your 4Runner 2wd or 4wd? 16" wheels too correct?
I wish it was as easy as reading the axle code to know what gears you have (which makes sense), but it ain't.
And when you do the tire rotation test, don't just do it once...do it at least 3 times. You've already got the tire jacked up, so a couple extra tests can't hurt. Just gives you more confirmation is all.
BTW, is your 4Runner 2wd or 4wd? 16" wheels too correct?
10-07-2010, 08:55 PM
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This is going to sound weird. I did as you guys said and jacked up the rear end, turned the right rear wheel one full revolution, and watched the driveshaft turn 1 3/4 times. I did it multiple times and kept getting 1 3/4 turns. I'm probably sounding dumb, but this correlates with a 1.75 gear ratio, which does not make sense.
10-07-2010, 11:22 PM
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according to the sonoran steel axle code list you either have 3.727 or 4.10 with 265/70 stock (which sounds like you don't.)
10-08-2010, 03:25 AM
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according to the sonoran steel axle code list you either have 3.727 or 4.10 with 265/70 stock (which sounds like you don't.)
This would make sense to me too, but apparently not to everybody. Thanks for the info. Looks accurate.
10-08-2010, 04:58 AM
#20
Although not that common for an '02, a 3.72 is more believable than a 3.42.
Just to confirm, when you did the tire test, you jacked up one tire and put a mark on it at 12 o'clock. You then put a mark on the driveshaft at 12 o'clock. Then you spun the tire one full revolution and watched how many times the driveshaft turned.
Example...If your driveshaft rotated just over 4 revolutions per 1 revolution of the wheel, that equals 4.10/1, otherwise known as 4.10 gearing. I don't see how you only got 1.75 turns out of your driveshaft with one spin of the tire?? Seems like you should get at least 3...
Just to confirm, when you did the tire test, you jacked up one tire and put a mark on it at 12 o'clock. You then put a mark on the driveshaft at 12 o'clock. Then you spun the tire one full revolution and watched how many times the driveshaft turned.
Example...If your driveshaft rotated just over 4 revolutions per 1 revolution of the wheel, that equals 4.10/1, otherwise known as 4.10 gearing. I don't see how you only got 1.75 turns out of your driveshaft with one spin of the tire?? Seems like you should get at least 3...
