Good evening ClubLexus! I’m not sure where to put this (build thread or general discussion), but I’m wanting to put a 3UZ-FE into my 1999 Mitsubishi Montero Sport. I am under the impression that the 3UZ’s had 6-speed transmissions (either an a340 or an a760e). I read on Pirate4x4 of a guy that put a 3UZ in his (97?) 4Runner and he modified an a760E by using a750H parts to make it 4 wheel drive and a bell housing from an a340.

So here’s my dilemma: I was hoping to follow this for my build and I picked up an a760H out of an 07 GS350 AWD which had/has the a760H. Wel, today, I was messing around with it and there is no way I can see the a340 bell housing (from a 94 SC400) will fit on. It won’t clear the transmission pump nor do the bolt holes line up.

So my questions are: is there a difference in bell housings and oil pumps between the RWD and AWD a760’s? Are there different bell housings for the a340 (ie early vs late, different bell housings in different cars)? Would a bell housing from an a750H work? Any solution to my dilemma?

 

I totally respect the effort here, and would love to see a 3UZ (hah, or a 2UR-GSE!) in a Montero. Unfortunately, I don't have any specific information about bell housing differences for you. I can tell you that the 3UZ in the 3rd generation GS was actually paired with an A761E, not an A760E. The 2GS V8 was paired with a 5-speed automatic (the A650E).

Wildly guessing, though, that an A750F or A760F might be a better match for your intended application -- they came with 4Runners and similar vehicles, and in some models (like the Lexus GX470 and 2003+ 4Runner) actually came paired directly with a 3UZ V8. The A750F even came with the 2009-2021 Mitsubishi Pajero.

 

I could be wrong, but my understanding is that the 3UZ was mated to a 6-speed transmission whereas the trucks and SUV’s got the 2UZ with a 5-speed auto. If this is the case, the electronic throttle body is different for the 2 engines and are not easily interchangeable. I also googled the numbers on the side of the transmission that came out of the GS350 and it appears to be the A760H. Also, I did see in Wikipedia about the A760E being used in the newer Montero’s, but 2006 was the end of the Montero in the USA, so finding a one from a Mitsubishi would be overseas and cost A LOT to ship.



Photo of the part number I believe of the transmission from an 07GS350

 

What exactly is the purpose of the pajero? Is it for mud bogging, rock climbing, sand? Why are you trying to use an awd transmission? ifs front or is it solid axle?

Toyota tunder transmission are identical to ours, I think they share the same code and internals. But maybe the casing is different! Maybe that person on pirate4x4 ran a tundra transmission.

Ive seen videos of guys running tacoma transmissions on 2jz and they claim it bolts right up.

 

Its main purpose will be off-roading in the Colorado Rocky Mountains. Here is what the guy on pirate4x4 did:I've done two different 1UZ swaps already, and am starting on a 3UZ from a 2005 LS430 with the a760e auto 6 speed. I am using the planetary gear and output shaft from an a750f (4-speed truck/SUV) and 4x4 adapter from the a340f (1996-2003 4Runner/Sequoia/Tacoma) to convert it to the transfer case.



To use the a760e, I sacrificed an a750f for the output shaft and a few other parts. Still needed the 4x4 tailhousing from the a340f since the pattern on the a750f tailhousing was too large (for a 1997 4Runner transfer case).

The Tundra transmission is a 4 speed auto and I would really like to have a 6 speed. I believe the 3UZ’s used 6 speeds and if this is the case, it would make wiring just a bit easier.

I bought this AWD transmission assuming all a760’s used the same cases, but it seems that this is not the case

 

You can resell that transmission as the awd are less then rwd for supply in the used market.

I did a search, what about the 2007-up Tundra 5.7 AB60F its an aisan transmission. But any transmission you choose maybe best to make a cardboard template of the mounting points of your 3UZ engine. That way when you visit junk yards. You can place the cardboard and make sure the mounting points are the same. If it were my pajera and wanted to do a swap, I would sell the 3uz, find a wrecked tundra, land cruiser, anything with complete drivetrain already together, but the body total loss. This way you dont scramble to match parts, and all the little bits will be in the donor vehicle. Using a full tundra, you have an option for a supercharger aswell. Aswell as running all the wiring harness.

Just curious what will you use to power the transmission module? Like how will it receive commands on when to shift? Are you going to run a 3uz full wiring harness or stand alone comptuer, wouldnt you need some sort of piggy back to control the transmission?

 

I chose the 3UZ based on the advertised 290-300hp vs the 260hp of the 2UZ. Plus I got my “blown” 3UZ for $450USD. Seller advertised “blown engine” but when I messaged him he said it runs and drives but had a loud squeal, possibly something in the timing belt area, and it rotates 360* freely without binding.
Since the condition of the internals are truly unknown, I’ll go through it and probably switch to 1UZ rods, ARP head studs and possibly pistons. 3UZ’s can be boosted with about 6-7psi, which is fine for me as I’m hoping to put on a TVS1900 supercharger at some point in the future.

Looking back and reading impressions of the 2UZ, it would have made my life easier to get a whole 2UZ Tundra donor, but I really don’t have the space for another vehicle right now.

My research so far has me thinking an unlocked stock ECU will control the transmission as well. I believe the car the engine came out of was a 6 speed so I hoping to get an a760E, modify using a750F parts to become a 6-speed 4x4 auto. My 3UZ is missing the throttle body, but I have the mostly complete wiring harness and I picked up the accelerator pedal and shifter from the transmission donor car.

I thought about selling the AWD trans, but I’m kind of wondering if the internals are compatible between the AWD a760H and the a750F. If they are I’ll l pick up an a750F swap everything up to the output shaft from the a760H be have the 4x4 6-speed. My other thought is just buy a Tundra a750, transfer case, intake and throttle body, modify the 3UZ harness for the 2UZ thottle body and just run a 4-speed auto. Lots to consider right now.

 

Sounds like the way you want to build it, would take a lot of time energy and money. By buying a rolled over tundra or sequia or landcruiser you can tear apart the car in a day or two. Remove and box all the parts, try to sell off the parts that you can recoup money from and scrap the frame and body if you are not able to sell the frame.

Currently you cant use the transmission, and you dont know the state of the engine. Sell the transmission, break apart the engine sell it as parts. I wouldnt be surprised in the end you would be breaking even or having to spend a lot less then planned. In a swap, its the little things that slow down a project, this part doesnt fit that, this ecu is not working with that. Skip all the head ache! You can have a turn key swap probably in less then 2 weeks if not less if you had a complete parts car.

Doing this way will save you a lot of headache! Because essentially your mitsubishi will basically be a tundra. You could run full harness and speedo from the tundra, that way you can run a scan tool, easier to trouble shoot problems. Having a complete cars will help save you a lot of money, and will help you better swap everything because you can see how everything is mounted in the tundra. You could even possibly cut off the tundra frame brackets and weld them to your frame. You would also have a driveshaft you can cut down to make fit.

2007 Tundra 3ur 5.7 381hp 6speed transmission, and super chargers are available. Surely you can find them dirt cheap on copart auctions.

 

I thought about the 5.7, but I heard from an ex Toyota tech turned SnapOn dealer that they tend to lock up the cams due to oiling issues.

 

Just wanted to throw this out there again -- the A760 models (both the A760E and A760H) were never mated to the 3UZ engine in the 3GS. The 3UZ in the GS430 came with an A761E. Supposed to be very similar with some beefed up components, but given the different model number the case could have differences to account for the V8.

I would also note that the AWD "transfer case" in the A760H is considered integral to the transmission -- they share fluid, so if you remove it you might have to figure out fluid routing and fabricate some sort of seal.

The A760E and A760H were only ever mated to the V6 (2GR, and the GS300 AWD with the 3GR got the A760H) engine line in the 3GS series.

 

I just assumed an A760 is an A760 regardless of what vehicle it was put in, just maybe different bell housings and tail shaft housings, but apparently, I was wrong. Guess this is what happens when you listen to some guy on the internet that very vaguely says what he did.

Yes, the transfer case is integral to the transmission. The entire transfer case has to be disassembled just to remove it from the transmission, and I mean completely, down to splitting the case. Not terribly hard, but a bit frustrating if you don’t know what you’re doing (like me). Anyway, it’s all part of the learning experience, and so far has been fairly inexpensive.

My next step will be getting an A750F from a Tundra and figure out the next step from there. And while I’m waiting for one to pop up, I’ll start getting parts for the engine and try to tear it down. Thinking about trying to do a compression test with it on the stand. Still deciding if I want the 2.64:1 Tundra transfer case or a 2.92:1 4Runner transfer case.

 

Heres trucks in your area! Buy one, sell the parts that you dont need and use all the parts that you do need. Its everything you need! imo best option for you

https://www.copart.com/lot/59312433/...o-denver-south

https://www.copart.com/lot/58446393/...lorado-springs

 

Another one destroyed with good parts for you. You can easily sell that leather interior for good, money and that winch. This truck may sell for $1,500-2,500 if not less

https://www.copart.com/lot/61758373/...ted-me-windham