Manual Transmission needs Replaced

Toughest part was always getting the splines back through the clutch plates for me.

 

Since they're admitting to a "major defect" I think you're ok. It's "geeze, we're not sure exactly but corporate has authorized a new tranny" that would be worrying.

 

QC? Quality Control? Please educate me up.

 

I have a manual and have almost 2K miles on it with no problems. Did they give date manufacturer dates?

 

I'm no expert but my understanding is that it is a hold after the factory but before delivery to the dealer as either a random quality check or to address known issues that have surfaced. The early grill shutter issues on the 4th gen are suspected to have caused widespread QC holds, although I don't believe Toyota officially states the reason(s) for a hold.

 

Thanks!

 

Screen grabbed these from another thread 4gen vs 3rd gen gearing.

4th does look appealing.

Hopefully all goes well with your repair and that Toypta rights the ship in short order.

 

yeah I dunno. Or if final drives would need changing again.

looks like very different ratios
On 35’s 4.88 calculator shows rpm 70mph 6th from RA60F would drop from 2787 to 2109 which doesn’t sound usable below 2500.

looks like they made 4th gen 6MT 4.30.

shows even if 4.30, 70mph around 2000rpm. Whether on 31’s or 35’s.

0.643 6th sounds very tall which they’re not reaching until 8th gear in the auto.

4.88 35 RA60F my truck felt like it could maybe use a 7th MT hear what like the Corvette has but I just don’t speed so.

 

Needs 5.29s and still not ideal for 35’s, on an NA motor at least. The turbo it’s mated to in stock form has a lot more grunt to push that rpm at highway speed. I’m going to run it on my 3G V6 but I only have 32’s and I have 5.29s. Like 2600 at 70, will be nice.

 

makes sense. Was gonna say idk how they’d move the truck at that low RPM without a short final drive.
If the electric is kicking in, direct injection, turbo, or limited places to actually use it.

I’d think for the cost associated with gears and transmissions a feature should be the ability to run bigger tires that are normally struggled with when not doing those things.

never experienced an issue but heard the shorter the ratio the weaker and less compatible it is. For example 4.88 one less pinion tooth than 4.56. Can only imagine 5.29.
Or you can get a stronger and wider rear axle that fits from ECGS that is said to be max 4.88 and not able to be 5.29.

Don’t know about 3rd gen RC62F
FJ RA61F
Or better TOB on RA60F

but whatever manual is in 4th gen looking at the calculator sounds like that trans would ruin the truck and counter the final drives by making everything tall through the trans and be just like a non geared stock truck on big tires with 3.73.

maybe they made early gears short to take off fast, and design the engine to rev more instead of torquey low end traditional truck behavior.

would be smart if they discussed what they did and why instead of 40 videos about how the stock length control arms are now red with a logo.

 

I mean, they choose the ratios based on a number of factors. This transmission was created for 2.4L and 2.8L diesel Hilux trucks overseas. They changed the input and shifter on it so they can stick it in the new truck. The 6th gear is designed for use with low end torque motors, aka turbo gas or diesel. Not NA V6. It could be used on flat ground with the V6 but it would be underwhelming.

Stock tires on new truck are 32’s. 3rd gen was 31’s. Same 4.30 axle ratio between the two. New truck will do 2100 rpm at 70 in stock form. The new turbo motor will push that just fine. Can still downshift to 4th for the same drive ratio as the old gen in 4th (other than the 1” difference in tire size, which is minimal).

The first 3 gears and reverse are all lower, which helps get moving quickly. That is the benefit, and of course crawl ratio if off-roading.

Whether or not it’s a good idea on the V6, depends on factors. 4.88 vs 5.29 and their comparative strengths are not a concern. Especially with the larger diffs the manual trucks in 3rd and 4th gen get. The teeth are plenty big and they maintain fine contact. I’d set up right, they’ll be okay. So 5.29 makes the most sense unless planning to use it with completely stock size tires. Even then, I’m barely larger than stock and I want 5.29s with it.

Reverse and 1st will be very low. I’ll really enjoy that. I have a V6 with very little low end torque, this will be a huge upgrade. And in the end I’ll cruise 6th at 2600 rpm, which is higher than stock for me. I like that.

If somebody insisted on 4.88 and 35’s with that trans, I’d suggest driving it like a 5-speed and don’t use 6th. That would work just fine with a naturally aspirated motor.

 

damn. Yeah I use 6th in the highway obviously that would change. 4th gen 6th on 4.88 would want the truck to speed where wind resistance goes up.

Only mentioned as 4.88 is what my truck happens to already have and changing that would be cost prohibitive. I imagine most 2nd gen’s here with bigger tires are 4.56 or 4.88.

makes sense the diesel low torque thing if it’s used in Hilux that might also have turbo on top of that.

 

The transmission is made in Thailand.

Jeff

 

Gotcha, I felt like I saw some kind of parts origin declaration on some picture and it said Japan. Must have been something else. I think it said 25% of the truck was from Japanese origin.

 

I just did a search and couldn't find any thing on 6 spd issues in a 4th gen.

 

I drove a new 2024 with the manual 6. I owned a 3rd Gen manual, and was not impressed with either. Both have entirely too tall of a first gear. It's almost useless and you could just take off in 2nd gear the majority of the time. That combined with a 4.30:1 rear axle ratio led to very high RPMs at even 65 MPH (2000). If you approach 75 MPH, you were well over 2K RPMs. That's exactly why the 3rd gen MPG was 3 MPG less than the auto version of the exact same truck. How they screwed this up not once but twice is hard to comprehend.

I opted for the 8 speed auto this time around...about 1600 RPMs at 65 MPH. Perfect...

 

For 2023 the 4WD Manual has an EPA Rating of 17 city and 21 highway, while the 4WD AT has an EPA Rating of 18 city and 22 highway, where are you seeing a listed 3 MPG difference?

For 2024 the Manual rating shows 18 and 23 and the Auto 19 and 24, so the same 1 MPG difference carries from 3rd to 4th gen.

 

Man that stinks! Seeing a Toyota broke down on a flat bed always blows my mind. You just don’t see it that often. Hopefully they get you squared away OP. I would get the lemon law paperwork ready if it were me. In an unrelated note I had my power steering pump replaced on my 12 with 14k miles on it and got side swiped by a semi when my truck was 3 months old…sometimes the worst happens to the unbreakable

 

Ford and Chevy forums are probably going to town with that picture by now.

 

im not going to read through all this, a full trans swap has been performed thousands of times by all senior techs at dealers, NOTHING to worry about.
No different than pulling a trans to replace a clutch or a damaged flywheel ring gear....
youre overthinking it...
very simple replacement.
Furthermore, youre getting a replacement, theyre not going-in & repairing it...