What is the purpose of the 2024 MT having less power than the auto!.

Someone probably said this already but according to the truck kings video and Sheldon the engineer there is 8HP less because it was exceeding the operational specs of the trans (aka trans could not handle it). Additionally, we just learned that the auto trans in the TFL truck failed because the trans exceeded operational specs by 1.7% and they are going to fix it through software (AKA lessen torque in those specific conditions where it exceeds the trans capabilities).

This does not sound like the OVERBUILT Toyota that we are all used to. I am not an engineer and I am sure I am missing a lot but exceeding operational specs by 1.7% and failing does not sound encouraging to me. You would think there would be a 10-20% cushion there but what do I know.

 

They went 1.7% over the cushion.

 

Anyone know what 24 Tacoma models are available with the MT? Everyone I've seen is auto and I tried building one on Toyota's website, and all I see are auto trans options?

 

SR, Off Road, Sport in Double Cab 4x4 short beds.

 

Thank you!

 

You are very welcome

 

I am imagining that having a manual transmission with a human shifting it to go into gear at 2000 rmps with an engine that makes peak torque (317lbs) at 1700 rpms wouldnt be very nice for the clutch or the transmission.

So they played with the tuning to get the peak torque to a higher rpm (2800 rpm) away from where 90% of the shifting would occur and that new tune yielded 8 less horsepower and 17 less torque's.

I am only guessing but I doubt it was a situation where 8 less hp was saving anything.

Surely they knew that owners would be able to squeeze more than an extra 8HP out of these engines.

The peak numbers only tell part of the story. A bigger part of that story is where in the rpm's does this occur?

And this explanation was probably too much for Toyota to expect the general public to digest so they just said crankshaft hammering and moved on to the next dumb question.

I was more curious as to how they accomplished this than why, but they just tuned it differently, and it uses all the same parts.

 

In a video he said it was de rated for crankshaft hammering (vibrations). Which if true, sounds like a lazy way of improving the NVH. Didn’t say it was for protecting the trans. This transmission can handle 300torque at 1600rpm with a 2.5 1GD diesel in the Hilux.

 

I just read through this thread after getting my first Tacoma with the MT.

The truck has pretty good acceleration once in 3rd and beyond.

1st gear is really little short in my opinion. I like the manual transmission, but I really cannot get a consistent smooth shift on 1 to 2 and 2 to 3. It seems to take forever for the RPM’s to come down if I get on it from a start and try to get through the gears.

All in all, I like the truck and like the MT.

Any gotchas or issues to look out for in the 4th gen Tacomas since the release?

 

Don’t shift from 5th to 1st.

 

Sounds like my wife’s bullet blender if successful.

 

1st gear is going to be short in a truck to accommodate a load. Probably not good for the life of the transmission but you could start out in 2nd gear unloaded. Short low gears is probably the biggest downside to the manual's driveability, but that's where the manual also has an advantage. People used to complain about the tall reverse gear. I wonder if that's has been improved?

 

1st, 2nd, and R are the exact same gear cluster from the previous gen transmission, however the tailset reduction gears connecting the counter shaft to the output shaft are 20.1% lower in the new transmission, so overall those 3 gears in the new transmission are 20.1% lower.

1/2/R in the new transmission are about the equivalent of regearing a 3rd gen to 5.29 on stock or not much larger than stock tires.

 

Sounds like an improvement on the reverse. I recall some discussion with the engineer on the manual and reverse gear from one of the earlier videos.

 

4-lo in 1st and 2nd gear is a wildly low crawl. The available torque would seem to be a recipe for finding weak spots in the driveline and axles.

 

I’m not familiar with Tacomas or their history. Isn’t reverse just the backside of 1st gear on any MT?

 

No, and I really don’t know where that came from, but I sure have heard it a lot over the years. Maybe in the olden days or something, but definitely not in any of the transmissions I’ve owned from Jeep, Ford, Nissan or this Tacoma.

4th gen Tacoma RC60F ratios:

1 - 4.784
2 - 2.423
3 - 1.443
4 - 1.000
5 - 0.777
6 - 0.643
R - 4.067

3rd gen Tacoma RC62F ratios:

1 - 3.982
2 - 2.017
3 - 1.321
4 - 1.000
5 - 0.848
6 - 0.713
R - 3.385

 

Should be a significant improvement for sure. Having 5.29s on mine made a large difference and gives perspective on what the 4th gen would be like. 1st is pretty low as such, which seems to be a complaint of some, but I'm happier with that than the stock 3rd gen gearing for sure. My guess is instead of complaining about how bad R is, now 1st being too low will be the center of attention lol. Still, R is only adequate. It's still pretty tall feeling, but it is a lot better than it used to be.

 

I wish R was geared as low or lower than 1st. R is for Reverse, not Racing.

Have to use 4-low if I want to crawl the slightest incline on if I don’t want to stall or burn the clutch.

Hope someone makes a 2-low kit.

 

I wish R was something stupid low like 7-8:1. Difficult to fit a gear that large into a small transmission though.

Based on browsing the wiring diagram, I don’t think 2 low will be any more difficult to achieve on 4th gen than it was on 3rd gen.