Axle Gear Ratios

Sorry! I missed this tag. I have not heard of it.

@Jeff Lange would be da man here.

Can you post a pic of you door sticker? If so, you might want to edit out the VIN.

 

All V6 autos have 3.91, wheelbase doesn’t matter.

Jeff

 

I do think that the long bed has a higher gear ratio because my truck, which is a 2021 long bed does not gear hunt and will hold 6th gear unless I come to a decent size hill. At 75, I am running about 1900 rpm. I wanted to also share a photo of my new wheels and tires. The wheel are RRW 's and the tires are the Hankook Dynapro at2 Xtreme. They are 17"

 

The Manual Transmission Models are the only ones with 4.30's.

 

Those same ratios are linked in my signature.

From my grimjeeper form:





From all of that, I'm not sure what the issue is:
[/QUOTE]


With me on 315/75/16s stock gears and at 65mph I'm in 6th gear like 1480 rpms edit at transmission


Not sure what the hell is going on with this message tried quoting and it's being dumb

 

Good information here. Any chance you data on the torque converter stall torque ratio and absorption curves?

 

The chance of me having that data for a Tacoma stands at 0%

 

General rule of thumb is 2:1

Most are 1.8-2.5

 

And for the Tacoma? And Tacoma absorption curves?

I’ve seen the generic info.

 

2.7L auto is 4.3 as well.

 

2.7L is 2.05
3.5L is 1.85

It doesn't.

There are only 2 ratios used on the 2016-2023 Tacoma: 3.91 and 4.30.

3.91 is used for 2.7L Manual and 3.5L Auto
4.30 is used for 2.7L Auto and 3.5L Manual

There are no other configuration options for differential ratio.

Jeff

 

Hm, I always thought 4 cyl, 5MT came with 4.30 rear end. Learned something new!

 

Thanks anyway, I suspected the absorption curves might be proprietary but hoped the total stall torque ratio would make good marketing material they might publish.

 

Any ideas why there is a different axle code between trims?

 

Different sized diameter rear diffs.

 

On ATs, 2017+ SR5 has A04A .There are 2021 SR5 with A07A.
There are 2017, 18 Sports with A04A.
Every axle code reference point 04 to 3.72.
07=3.9

 

Following up on this, since it all seems a tad odd... I looked into things and have determined that the axle code for 2016-2023 Tacomas is basically useless. It means nothing.

There are trucks with A07A (e.g., 3TMAZ5CN0MM149039) and A04A (e.g., 3TMCZ5AN5KM240400) that have the same differential (41110-04130, 3.91 8.0 in Open), there are other trucks that also have A07A (e.g., 3TYCZ5AN0MT015695) but have different sized differentials with different gearing (41110-0K600, 4.30 8.8 in Open).

I also found a couple of Tacomas that didn't even have an axle code listed on the data tag (e.g., 5TFCZ5AN0MX269073, 5TFAX5GN4LX172994).

I thought maybe it was factory or year or something, but then you get trucks that were made at the same factory in the same year that use different formats (e.g., 3TYCZ5AN5MT043265 and 3TYCZ5AN7MT049505 are both 2021s made in Guanajuato with 4.30 8.8" diffs, one with axle code A07A - open diff, one with B07B - locking diff).

So my advice to anyone wanting to know what differential their 2016-2023 Tacoma has is to NOT use the axle code. I have examples of trucks with 8.8" diffs being A or B. I have examples of trucks with 3.91 and 4.30 gearing having 04, 06, and 07 codes. I have examples of trucks with no axle code. It's a complete crap shoot.

There may be some rhyme or reason to if it you really look into it, like for this package made at this factory in this year, A04A means this... but the information you would need to know to know what the axle code means is more than enough to already know which differential it has, so... worthless.

Very un-Toyota of Toyota on this one.

Jeff