Axle Gear Ratios

What axle Gear Ratio does the 3rd generation use??
In the Toyota Tacoma Build on their Website, I don't see any options or mention of the ratio.
I'm going to guess 3:73 or even higher? Are there differences because of the fact that the truck is Manual or Auto?

 

Auto is 3.91 and manual is 4.30.

 

V6 Auto's use 3.91, manual trans gets 4.30's

 

The other piece of the puzzle is that the AT itself is geared a lot higher than the MT. So, an AT with 5.29s is roughly equivalent to a Stock MT. You have to look at the overall situation.

 

Your number 5.29 is in reference to what exactly?
I'm a little confused. So RPM on the engine at 60 mph is the same or different on the two transmissions if they are both in 6th gear?

 

Sorry about that.

5.29 is the most reasonable regear ratio for the 3rd Gen ATs. Typical regear ratios are 4.30, 4.56, 4.88, and 5.29. Just with the crazy AT ratios mismatched with the 3.909 stock gearing, 5.29 is about the only choice, esp now that the vendors have proven the strength on thousands of heavy rigs.


Yes, though. At 60mph, a Stock MT and an AT with 5.29s are turning nearly identical revs in 6th gear, along with great improvements in all of the other gears. This is from http://www.grimmjeeper.com/gears.html :


The only difference is that both the MT (left) and AT (right) are sized for 265/70R17 / 32in tires, not the Stock 265/65R17 / 30.5in tires. 2k at 60mph feels just right to me.

The gearing is from the link in my signature.

 

I don’t see how this could be correct, given that per the tables I posted above show a 6th gear ratio of 0.71 for the manual and 0.58 for the V6 auto, with both having 5.29 differentials. Seems that 6th gear in the manual (0.71) and the 5th gear in the V6 auto (0.69) would be closer to the same rpm/speed if both have a 5.29 diff. (Note that the stock OEM differentials for auto V6 and Manual are different in the tables so doesn’t apply to stock diffs).

 

I don’t see how this could be correct, given that per the tables I posted above show a 6th gear ratio of 0.71 for the manual and 0.58 for the V6 auto, with both having 5.29 differentials. Seems that 6th gear in the manual (0.71) and the 5th gear in the V6 auto (0.69) would be closer to the same rpm/speed if both have a 5.29 diff. (Note that the stock OEM differentials for auto V6 and Manual are different in the tables so doesn’t apply to stock diffs).[/QUOTE]

Those same ratios are linked in my signature.

From my grimjeeper form:





From all of that, I'm not sure what the issue is:

 

Ah, so you were comparing 6th gear in a stock MT with a stock 4.30 differential to a V6 auto with a 5.29 differential? It was the way you worded it, sounded like you were saying both with 5.29 differentials that threw me. It’s an interesting comparison!
I like seeing the math behind spreadsheet formulas, this one shows how it’s derived (so if you want to be more accurate use 336.13 in the equation since it’s rounded below):

 

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]
Wow that’s wild to see that the stock MT gearing in 6th is almost the same as 5.29 gearing with AT.

Very interesting, thanks for sharing!

 

While I do agree. The automatic is geared to high.I don't think 5.29 gears are the answer. Maybe if your running 37"tires.

On stockish tires (285 70 17 and smaller) i think the 4.30 gears would do the trick.( on a near stock truck)


[/QUOTE]

But in 6th the 4.30 MT is running same rpms as the 5.29 AT.

 

You're over thinking this. Even though the MT is geared slightly lower in 1st gear the torque converter in the AT more than makes up for it when it comes to doing work. Especially with an engine needing 4600 rpm to reach max torque. The AT is geared lower in 2nd and 3rd and they are all the same in 4th. The AT has a HUGE advantage in reverse.

What they do in 5th and 6th has no bearing on getting work done. That is an attempt to get better fuel mileage. If anyone needs to do any work with their trucks they won't be above 4th gear anyway.

 

I was quite clear, but anything is open to interpretation.

 

I think that the biggest problem is the last two gears, 5th and 6th. These two gears(in the AT) are so tall, that your truck in standard form will never use them under normal driving. The 5.29 gear turns those last two gears into normal driving gears and gives you basically the same gearing as the manual trans. I have yet to hear anyone that got 5.29's complain about them. It becomes a different truck. I plan on doing it.

 

Except in the 2.7L 2TR-FE 4 cyl automatic where the differential gear ratio is also 4.30.

You V6 guys always forget about us

 

Um... Old thread.

 

Old thread yes but also interesting, haven't heard of this before.
I wonder if this is something new for the 2022 models.
Nice unexpected upgrade I bet a lot of the 3.91 guys will be
@tonered have you heard of this?

 

I have a real hard time believing this. Where did you find the info on the 43R and 10P? It's a well known fact that Manual TRD's have a 4.3 and autos have 3.91. And that's it. I am surprised more people didn't respond to this post. I just looked it up on Toyota's own website and it verified 3.91 and there is no option for 4.3.