Jeep AW4 / Supra Auto tranny hybrid

Supra (Aristo) transmission with modified valve body, output shaft and tail housing... + more clutches than any Jeep has ever had.

This setup is similar in components to those used in Supra or SC300 turbo auto transmissions handling over 550 wheel horsepower with no problems.

I will confirm that the valve bodies are switchable and that the valve body modifications made to the Supra transmissions can be applied to the AW4 valve body.

No excuses to not see 2J's in Jeeps now.

how much do they run? price wise?

Dunno. I haven't thought about that. Do people actually want to buy them? I've been given the impression over and over that almost no one actually wants a 2J in their Jeep, however almost everyone thinks it would be cool to see someone do it.

excellent. *evil voice*

a 2JZ XJ has been a dream of mine for years.

Is it a direct bolt it like wireing and hardware wise?

Well, there are two issues that I see so far. One, the Jeep output shaft housing has an extra bolt hole... easy enough to drill and tap properly. The other mod is going to be the speed sensors. There is a secondary 2-wire pulse generator (magnetic) that fits in it's original location, no problem. Both shafts are 4- prong. The main 3-wire sensor, however, was in the tail cone of the 2WD version. I will see what the wiring and sensor look like in the 231 transfer case tomorrow. I may try to install the gear driven speed sensor from the 2J into the transfer case, but since the one sensor that does plug in is supposedly used as a back-up when if the primary VSS were to malfunction, then I may just go with that and not have a back up. Another option is to simply splice the Jeep signal generator into the Supra harness. I need to see if this VSS even goes to the computer or if it simply goes to the speedo.

Seems a lot of work... but keep us updated on how it goes.. I like to know how it shifts and the gearing are on them. You would think they have different gears than the AW4 jeep uses.

here some google info I found on the swap on Pirate

http://www.pirate4x4.com/forum/showthread.php?t=855167

I've seen that before, but that wasn't connected to the right 3.0L. That's not "the" swap. That 3.0L is not a 2J, plus when I bought the 2J it came with an A340e. There are some differences, some of which the exploded views did not show. Two major differences (and why I wanted to use the Toyo trans with the minimum Jeep internals) are the number of clutches and the number of solenoids. The toyota has more clutches and one more solenoid. There are also 6 or more wires going through the harness to the Toyota trans that the AW4 does not have. Since I am doing a 2J swap, I want to keep the 2j ecu happy, and the best way to do that is to plug the Supra drivetrain directly into the transfer case. 4WD or go home, right? I am sure similar modifications would have to be made to make a 2WD AW4 mate to a transfer case (both are factory options) or an A340e into an A340h or f... again, factory options. I simply cross bred them... 2WD Toyo with 4WD AW4 parts. This keeps the bellhousing, torque converter, and trans wiring harness virtually untouched.

I'm not sure what seems like a lot of work... the entire engine swap, yeah, I guess. It's a lot mentally so far, and will be physically on the weekend the swap happens. I choose to make it hard, because I believe God is in the details, not the devil. After this initial build I should be able to do it again, start to finish in 2 weeks or less. The tranny mods? Not at all. A few hours in an afternoon and it was done. It just took a few months to get to it, hahaha.

Gear Ratios for the A340E 2WD
First - 2.804
Second - 1.531
Third - 1.000
Fourth - 0.705


Gear Ratios for the AW4 4WD
First -2.80
Second- 1.53
Third - 1.00 &
Fourth- .75

(According to them there interwebs)

Mostly different final ratios in the rear end.
US Supra TT Diff Ratio = 3.13:1
Auto Jeep I6 = 3.55:1

About 12% difference in the final torque multiplication. It'll be quicker, just not faster. Also curb weight is 400 lbs. less than a TT Supra (before the engine swap). I'm sure the Supra drivetrain with turbo is heavier than the extra iron in the 1L larger Chrysler block. We'll see. I'll be making the manifold out of sch 40 stainless 1-1/4" tubing. Stock EVO VIII single turbo. There is a public scale nearby. I'll get numbers for comparison.

Shifts should be good and crisp, but not made for the 4000 stall converter often used in the Supras. Line pressure has been increased. As I understand, increasing the line pressure of the AW4 should be done anyway.

How did this end up working out for you, OP?

Very very well.

A 2JZ is a Terrible motor...


If you Value your Driving record..

I've kept it in check...thus far.

What stall converter did you use? I've been hunting for an option and I think I read that the Supra converter is 3300rpm?

Is there an industrial/box truck option from Toyota for this same transmission?

I used the stall converter that came with the engine and transmission combo. It is equivalent to a Lexus GS300 converter (circa 1994 or so). There are numerous applications for these transmissions. From the "Toyota A Transmissions" wiki:

A3xx

A340H
4 Speed Automatic Transmission (4x4)
Applications:
1988-1995 4x4 Trucks w/v-6
1990-1995 4Runner (4x4)
1998-2005 Toyota Altezza Gita Wagon (GXE15W and JCE15W)
(Gear ratios 1st-2.80, 2nd-1.53, 3rd-1.00, 4th-0.71, Rev.-2.39) Chevy
A340E (30-40LE)
Applications:
1987-1992 Cressida (30-40LE)
1986-1998 Toyota Supra non-turbo
1987-1998 Toyota Supra turbo
1990-2000 Toyota Chaser/Mark II/Cresta 2.5 (1JZ-GE)
1995-2004 Toyota Tacoma 2.7L I4 (4WD), 3.0L V6, 3.4L V6
1993-1995 T100 3.0L V6
1993-1997 Previa 2.4L w/supercharger
1991-1997 Aristo 3.0L I6 Turbo
1992-2000 Lexus SC 300 3.0L I6
1992-1999 Lexus SC 400 4.0L V8
1990-1995 Crown Majesta 3.0L I6
1999-2003 Crown Athlete V (1JZ-GTE)
1994-2000 Toyota Soarer 3.0L I6 (2JZ-GE)
1995-1997 Lexus LS 400 4.0L V8
1989-2002 4Runner (4x2) (30-40LE)
2001-2004 Sequoia (4x2)
2000-2004 Tundra (4x2)
2005-2007 TOYOTA COMMUTER 2.5L DIESEL
1985-1995 Toyota Pick-Up 3.4L
1991-1996 Jeep Cherokee 4.0
Ratios 1st:2.804, 2nd:1.531, 3rd:1, 4th:0.705, Reverse: 2.393
A340F
Applications:
1995-2003 4Runner (4x4)
2000-2004 Tundra (4x4)
1985-1988 4-Pickup (4x4)
1996-1998 T-100 (4x4)

That Commuter Diesel is actually kinda neat, if your into that sort of thing. Cooler that a VW imo. The 4wd truck applications are the a340F variety, which is effectively what I turned my a340E into by swapping in Jeep AW4 components. This way the compy is happy with all the electronics...except the VSS#2, which I'll get to one day.

Thank you