5 speed auto

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Here's a clue for the A650

Replacing A340F with an A650E

If this is true, can't the A343 be made to work the same way? A650 is truly a revised A34X series tranny.
Would a valve body from A650 work with and most importantly fit the A343?

"The A650E is a bit of an oddball. I think this is correct but I might be wrong. It has 3 gears and 1 overdrive. The way it works, I can see why it would be a beeotch to bulletproff it.
Drives like this:
1st gear= 1st gear
2nd gear= 1st gear + overdrive
3rd gear= 2nd gear
4th gear= 3rd gear
5th gear= 3rd gear + overdrive"


Although the math doesn't add up. 3.357 x 0.753 = 2.528
 
Here's one other clue:


Screen Shot 2017-06-10 at 2.19.51 PM.png



Apparently this A350E works on the OD coupled with one gear principal.
The 2nd gear is actually the 1st gear x OD. The rest of them are "simply" gears.
The OD is just a little taller than ours.
 
@scottryana
Another take on this topic.

6L80 is 23.5" long

It has the same bellhousing bolt pattern as 4L80, and the bell housing can be interchanged with 4L80.
There is an adapter for 4L80 to 1FZ already on the market ($1600 though).
Mark's adapter for x-case.
Compushift or TCI (cheaper) to control the tranny, plus throttle positioning sensor, plus a shifter, plus... plus...

How long is the A343?
Would all the adapters (front and back) and the 6L80 fit within the space the A343 occupies?
All I know is that is a long transmission in our trucks.
 
A343F is 33" long.
Mark's adaptor 8.07"
----------------------
31.57"

roughly 1.5" wiggle room for the engine to tranny plate.
????

Toyota-1FZ-FE.jpg
Is that the $1600 adapter? If it is, I think that's a lot of pieces for the money.
 
I put a 1uz with its transmission in my Hilux Surf a while back. The Surf transfer case bolts right up you just have to cut the output shaft and tap an extra hole. The boss for the extra hole is already there. I don't think you can use the Surf transfer on ours because it has the driveshaft on the other side but I'm not a 100% sure on that. I used the computer from the ls400 that I ripped the drivetrain out of to control the trans so can't really talk about using an aftermarket controller. It was actually a very easy swap and I think I'm going to do another when I'm done with my cruiser and Vette. There is a bunch of info here Engine Transplants - Hilux Surf Forum and you can probably find out a bit about the transmission if you are willing to search through the site.
 
At $5000, not including labor, it is really difficult to justify going through this tranny swap. I simply can't see it make any sense at all, whatever tranny you choose, 5 spd, 6 spd.
You are half the way into a V8 swap at this point. It will not be an easy and inexpensive project.
I think I might just have to resign from this project.

For this much you can get a killer turbo setup or a supercharger installed and have a bigger smile on your face.

What I really wish is for all manufacturers to offer repower options for their old models. Keep up with the new driving demands, fuel economy and less pollution, keep icons on the road longer.
But they are in the business of selling more cars, not powertrains.

I went through a similar process a few years ago with a classic Mercedes. I really wanted a newer transmission in it. Nothing happened on that front either.
Having a modern engine and tranny in it, makes 0 sense since it is a classic and the value will plummet after such a swap. Not desirable.
Besides, I only drive it less than 20 miles a year.
 
At $5000, not including labor, it is really difficult to justify going through this tranny swap. I simply can't see it make any sense at all, whatever tranny you choose, 5 spd, 6 spd.
You are half the way into a V8 swap at this point. It will not be an easy and inexpensive project.
I think I might just have to resign from this project.

For this much you can get a killer turbo setup or a supercharger installed and have a bigger smile on your face.

What I really wish is for all manufacturers to offer repower options for their old models. Keep up with the new driving demands, fuel economy and less pollution, keep icons on the road longer.
But they are in the business of selling more cars, not powertrains.

I went through a similar process a few years ago with a classic Mercedes. I really wanted a newer transmission in it. Nothing happened on that front either.
Having a modern engine and tranny in it, makes 0 sense since it is a classic and the value will plummet after such a swap. Not desirable.
Besides, I only drive it less than 20 miles a year.
FWIW, the research you have done to this point is of great value for others. I have a supercharger, and actually would like to switch up eventually to stand alone ecu and turbo. The issue that bugs me right now is that transmission. Every time it bakes me going down the highway all I can think of is that huge power loss. A 6l80 is 20-30% less power consumption plus 2 more gears so I still am hoping. If I pushed on to the transmission swap first, I may find all the power I ever wanted. If it ever happens, I'll document it. I'm going to keep my eyes peeled for a smokin deal on a transmission first, then go from there.
 
6L80 cane found for less than $1000. DOn't know what the condition it might be in. See @bloc 's posts reg the work his needed. They are not all perfect. The remanufactured ones are great. The rebuild ones, not so much.
I replied to his posts with a few links you might be interested in. Good to keep in mind for the future.

The 6th gear on 6L80 is way too tall. It will drop the engine RPM in a lower power band and you might experience some gear hunting on the freeway. If you plan on driving 80+ MPH it's possible it will be just fine.

It will work great with 4.88 gears and 35"
(Based on paper research, not actual real life findings!!!!!!!!!!!!!!!!)

Stock gears will get you 2.74 final ratio, which will actually be lower with 33's, 35's, etc which will make it shift like crazy between 5th and 6th due to lower RPM and lower engine torque.
A 4.88 gear will bump it to 3.26 ratio which in turn will be a little lower with larger tires too, and it might just put it in the sweet spot Toyota designed the engine to be at freeway speeds... 3.09 ratio for stock everything.

I really have to mention it again... this is based purely on what the paper calculation show, not tested in real life.


If you want to keep it as much Toyota as possible, then a turbo 1FZ and a 6L80 tranny might get you partially there. At least it's not a full blown GM V8 swap and it will cost you less as well. With a V8 swap you are looking at $25k-$30k range. Turbo plus tranny and a lot of work done by you, might put you in the $10k ball park.
 

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