Does any one know the mitsubishi automatic trannys?

[DougH]

Hey,

I was just wondering if any one knew a little bit more about the transmission that was used with the 3.0 from 90 - 94. And possibly earlier with the genI 3.0's.

According to the information I found on the internet it is a aw372l.

It is a 4 speed with over drive, and Electric lockup.

There are also aw372, but these are different I think, and weren't offered as an application for these trucks.

There is a toyota application called a44dl/df and a45dl/df. I think these are the same transmissions, but I found all the information on the mitsubishi transmission to be pretty confusing. According to the tranny sites, its not just me, the info IS confusing.I was look for a source of information, and rebuild kits... for two reasons.

1st: I would like to see if it is possible to bolt a different tcase into the transmission, a toy case for instance.
That would provide ALOT of different gear options that we never had before. Otherwise I will be buying a set of the Aussie gears.

2nd: The transmission on my genI has 240k miles on it. Not exactly new. I would like to try my hand at rebuilding it. If I screw it up I will only be out my time. If I actually do it correctly I will have a decent transmission, for cheap. And I will learn alot doing it.

The genI is going to be trailered currently, so if I bugger it up, I wont be any kind of trouble.

Are there any good tranny sites, or reference manuals that I can buy, or borrow from some place?

Thanks,
DougH

[Alex Kogan]

Here what I compiled while browsing internet:
A372L - 3.0L V6 - 1990-5/94
AW30-40LE (A340F) - 3.0L 24V 3.5L V6(I suppose 2.8TD as well) - 6/94-98
A340F was used in Toyota 3.4L 4Runner But Toyota's tcase has front output on passanger (right) side while ours are on driver(left) side.
A340F was also used on 93 4.0L Grand Cherokee. I got tcase output on the drivers (left) side.
I think the reason why Mitsubishi introduced 40 mm lift for 3.5L was A340F tranny. It is bigger. I doubt it will fit your 92. I personally think that 2.85 tcase is more then enough for any wheeling particulary combined with 5.29s

[DougH]

I would be doing a body lift to fit my 35's any way. The main issue to me is not the mounting or the size. I can get all the hardware from a junked genII, including the tranny mounts and the cross member.

The problem I see is the tranny not working with my ECU. I assume the lockup on the convertor is electronically controlled, along with the shifting, so if you put the wrong ecu in, it is going to work like crap.

Thanks for the insight Alex.

[Bitsamissin]

I think the best possibility would be the fitment of a Jeep t/case to the Mitsu auto. This seems most likely for the 3.5 V6 auto and that is why Mitsu did the 30mm body lift to fit it in the tranny tunnel (Alex is correct).
I think Augie did some work on this, but the NP231 is a much larger t/case and god knows what mods it would need to fit even if it bolted up directly to the auto. If it could be done then the 4:1 Tera low range could be installed giving phenomonal low range reduction.
But I think it would be overkill as Alex said, these vehicles do not need a massive low range reduction, I think Swartzy (with the auto) is just about right with his set up.

[Lordtrunks]

I also must agree i was all about 4:1 untill i got my aussie case and must say 4:1 maybe to low for my liking so far power hasn't been a problem and that is with my 2.6 with 200k on it and a carb thats acting up turning 35's so with the v6 and that case power shouldn't be a problem., and yea know a v6 wtih a supercharger on it the ol'stall would never even come close. Once i get my turbo in the stall will never even present it self to me either unless i deside to run 40's or something.

[Swartzy]

Thats a good point, ultra low gearing is starting to loose some favor as it causes control problems as well. There are plenty of complaints on the Rubicon already even. We saw a group of Toyotas with Zillion to one 5K gear set ups on Fordyce and they had to redline and stall the rigs constantly just to keep the engine running, and truck moving! How stupid! With the 5:29s and an Auto I cannot emagine going lower. With a stick I could see maybe a 3 something though, but 2:85 should be just fine and dandy for tires as small as 35".

[DougH]

See my point is you can go lower as the situation dictates, and you can have a way stronger setup.

If you went with dual cases you could use the first case as a reduction box. When you dont want to get reduction you dont shift it, then you could have a ratio of say 3:1 or something in the second transfer case, hell you could run a stock ratio of 2:1 or so when you want to do some mudding and need the wheel spin.

But when you really want to crawl, you shift the first case into low... and now you have 4:1. You could also use low range in 2wd with this kind of setup.

I dont think I would do this with a genII, but if I could find a way to get low gears, and a fixed yoke on a genI, that would be cherry.

I dont want a 4.3 or any other fancy swap in my engine bay. I like the 3.0, and I know the 3.0 well enough to fix it. A diffrent tcase that I could use with it, would mean that I can keep the mitsu 3.0 when I do my solid axle swap.

Otherwise I am going to have to swap in a new engine and tranny, to get the better gearing, the gear driven tcase, and the fixed yokes.

[Lordtrunks]

Well doug i'll go down and get some gaskets to compare and see what i come up with and i'll let you all know what i find.