Axle Ratio from 1999 SR5 v6 auto 4wd

[kissmybass]

Hi guys, new guy here. I did a lot of searches already so be nice . Hope you guys can confirm something for me...

I picked up an e-locker axle from a 1997 4runner Limited 4wd auto v6 at my local junkyard. I counted the ring splines and pinion splines and determined it's a 4.3 ratio (like most of the other threads have stated). 43 splines on ring gear and 10 on the pinion gear.

My question is on my current car. It's a 1999 4runner SR5 4wd auto v6 no locker. I don't want to have to tear it apart to figure out the gears. Most of the threads state it is "probably" and most likely a 4.10 given it's not locked. However, I jacked up 1 rear tire and did the "spin test" and got these results.

13 single tire rotations yielded exactly (or very close to it) 28 axle rotations.

28*2 / 13 (since I think I'm supposed to rotate tire twice) and got 4.30769 gears.


Am I good to say I got 4.30 gears in my v6 auto. That'd make my day since I could just swap the entire axle! :guitar2:

I want to make sure before I start re-buliding the junkyard axle and buying the relays/switches/etc.

Thanks Yoda Fam!

**EDIT 8/13/2017: Did the 20 tire rotation spin test and confirmed I got 43 axle rotations exactly. Both methods seem legit but this one confirmed it's 43 / 10. I'll probably open her up for kicks to confirm.

 

[Mark_BC]

If it's automatic it is very likely 4.3, not really related to if it is locked or not, except the lockers are more common in Limited editions and all Limited's are automatic which is 4.3, so most locked axles are 4.3.

 

[19963.4lsr5]

My 97 SR5 auto is 4.10........which matches the ratio code on the door sticker. With stock tires at 2000rpm I'm doing 63-64mph.

The 97 Limited e-locker is doing 58-59mph at 2000rpm with a 4.30 gear code on the sticker.


Sent from my iPhone using Tapatalk

 

[kissmybass]

Yah, i confirmed the locker i pulled from the 97 limited is 4.3 via the splines. I just wanted to confirm if my 99 (non locker) was 4.3 or 4.10. I'm fairly sure it's 4.3 based on the spin test but a lot of the forums state they were 4.1!

I will drive on the freeway to see what i am at @2000rpm.

 

[nissanh]

Wow... so you are the one who pulled the axle from the 97 in the yard in Fresno. A friend of mine took the seats off of the same truck and he said there were two who looked very happy to find something near the dash. I said it got to be the rear locker!

Anyways... post the code located on the door jamb or a picture of it.

 

[Scramble]

If it's automatic it is very likely 4.3, not really related to if it is locked or not, except the lockers are more common in Limited editions and all Limited's are automatic which is 4.3, so most locked axles are 4.3.

Nope, most non locked Limiteds are 4.10. Locked are 4.30
Manual SR5's Locked are 4.10,
not sure about SR5 Auto's though they are rare.(Highlanders, SE's)
Locked, manual Base models are 4.56

 

[Scramble]

Hi guys, new guy here. I did a lot of searches already so be nice . Hope you guys can confirm something for me...

I picked up an e-locker axle from a 1997 4runner Limited 4wd auto v6 at my local junkyard. I counted the ring splines and pinion splines and determined it's a 4.3 ratio (like most of the other threads have stated). 43 splines on ring gear and 10 on the pinion gear.

My question is on my current car. It's a 1999 4runner SR5 4wd auto v6 no locker. I don't want to have to tear it apart to figure out the gears. Most of the threads state it is "probably" and most likely a 4.10 given it's not locked. However, I jacked up 1 rear tire and did the "spin test" and got these results.

13 single tire rotations yielded exactly (or very close to it) 28 axle rotations.

28*2 / 13 (since I think I'm supposed to rotate tire twice) and got 4.30769 gears.

Am I good to say I got 4.30 gears in my v6 auto. That'd make my day since I could just swap the entire axle! :guitar2:

I want to make sure before I start re-buliding the junkyard axle and buying the relays/switches/etc.

Thanks Yoda Fam!

You have to rotate the tire 20 times & count the rotations of the drive shaft. Or do it 10 times & times it by 2. But 20 times gives a more accurate number say if you're trying to figure out 3.90 vs 4.10. etc.

 

[kissmybass]

Yah. My brother-in-law and I were there when he took the seats . I was eyeing them too but I wasn't sure if I wanted leather (got them in my other cars and it's hot as f*** in Fresno). And yah, we were happy to find the 4WD ECU. We took the axle first and I recall needing that thing. The ECU was ~$100 when I looked it up real fast and I got charged $5.99 .

Here's my sticker.

 

[kissmybass]

You have to rotate the tire 20 times & count the rotations of the drive shaft. Or do it 10 times & times it by 2. But 20 times gives a more accurate number say if you're trying to figure out 3.90 vs 4.10. etc.

I actually recorded the video... i will check again .

 

[Scramble]

Oh, its a Canada truck? You have to do the US conversion on the ratio. :rofl:

 

[nissanh]

You got A04A as the axle code. According to the off-road.com and LCengineering.com, you got 4.56 ratio.
LC ENGINEERING Differential Tech

 

[88toy4x4]

You got A04A as the axle code. According to the off-road.com and LCengineering.com, you got 4.56 ratio.
LC ENGINEERING Differential Tech

That list really only applies to the 95-04 Tacoma models.

The typical codes for the 96-02 4Runners are as follows:
A01A 3.73
A02A 3.91
A03A 4.10
A04A 4.30
A05A 4.56

But every now and then, some still don't match these codes.

 

[Scramble]

You got A04A as the axle code. According to the off-road.com and LCengineering.com, you got 4.56 ratio.
LC ENGINEERING Differential Tech

Only the 3rz's came with 4.56 from the factory. And those were only manuals with 16" wheels. I use Sonoran Steel's web site for the codes. LCE is heavily Taco biased. Argh!

 

[nissanh]

Not related to the ratio. If you notice the wheel size, it shows 15 and mine also show 15, but the factory wheel is 16: strange!

 

[Scramble]

Not related to the ratio. If you notice the wheel size, it shows 15 and mine also show 15, but the factory wheel is 16: strange!

Yep. my door code says 225/15, but came with 16". From what I've seen they all say 15"

 

[kissmybass]

You have to rotate the tire 20 times & count the rotations of the drive shaft. Or do it 10 times & times it by 2. But 20 times gives a more accurate number say if you're trying to figure out 3.90 vs 4.10. etc.

Good to go. Thanks, this confirmed again that it's a 4.30. Seems the door code also confirms it.

20 tire spins = 43 axle spins on the dot! 43/10 = 4.3 .

Also turns out that I have the rear harness already! I did cut the breather though....

Time to start putting my axle back together and getting her ready for the swap / lift job i'm putting on.

 

[nissanh]

Do you mean 10 tire rotations and 43 drive shaft?

 

[kissmybass]

Do you mean 10 tire rotations and 43 drive shaft?

Nope, 20. I think because of the open diff or the way the spider gear works, it only rotates 1/2 for each tire spin. I noticed it when I was spinning it that it would get easier half the way.

 

[phattyduck]

Do you mean 10 tire rotations and 43 drive shaft?

With one side stopped (on the ground, etc.) you need to do 20. The ring gear rotates at the average speed of the two wheels (with one stopped, the other has to go 20 to average 10 between the two sides).

-Charlie

 

[phattyduck]

Not related to the ratio. If you notice the wheel size, it shows 15 and mine also show 15, but the factory wheel is 16: strange!

They are all that way. 16" wheels were a port installed thing (not a port option, just port installed). It was probably in importation/tax issue. Or maybe it was a shipping issue (tire hold downs a certain size or something).

-Charlie