Is it true tranny tunnels are different sizes between auto and manual?

[noahwins]

Please tell me it's not true and I won't have to expand the tranny tunnel going from a KM145 to an AW372...

[pennyman1]

the auto tranny tunnels are larger than manual tranny tunnels, and requires offset pedals for gas and brake. It is true, sorry...

[BradMph]

What generation truck are you doing this to Noah

AW372 Transmission
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Looks like the manual transmission except for the big box oil tray




KM145 are terrible transmissions, glad your looking to get rid of it. They usually get rid of themselves by self destucting

[noahwins]

Thanks guys.

2nd Generation. Excuse me, it's the KM132, not the KM145. Narrow block 2.0 5 speed. I'm getting so burnt out on all of the acronyms and numbers to remember. I thought I had everything lined up for the conversion, pedalset, steering column and linkage, 3.54 rear diff. But then someone made an offhand comment about this today on Facebook group. I guess it's better to find out now rather than when it's on the tranny jack. New crossmember, too, eh?

I wanted to hook this up to the diesel. Which needs to be totally rebuilt.

Getting so discouraged. I'm considering throwing in the towel. It sucks not having a car buddy who can help out. All of my old car buds moved to different cities. Overwhelmed with the to-do list that keeps getting longer.

Maybe I should step away from all of this for a while.

[BradMph]

I do things all myself also. Your right too, it is hard. I have found ways to do things that would usually take 2 people to do and do it myself. I probably would finish things a little quicker also if I had that extra person.
Just do a little at a time each day and try to not add to the list until you have moved through your prior list. You'll find that some days your motivated and others are spent thinking about it which also is accomplishing.

[noahwins]

Would the wideblock 5 speed from a 2.4 fit without modifications?

[noahwins]

I guess it's time for Plan B.

R5M21 (1990+ wideblock 5 speed 2.4L)
1 3.967/4.330
2 2.136/2.356
3 1.360/1.509
4 1.000/1.000
5 0.856/0.834

This is about 2650 RPM at 65 MPH on a 195/65/15 tire with the 3.54 rear end. The rev limit for the 4D56 is about 4000. Too high to cruise at.

AW372 (1989 and older wideblock automatic)
1 2.826
2 1.493
3 1.000
4 0.688

That's about 2130 RPM.

Maybe I can swap out an overdrive gear and use the manual.

Or man up, stop crying about it, punch the floorpan out and get one of these things.

http://chassisengineering.com/index.php?route=product/product&path=2_92&product_id=23

Not like I'm the first to encounter this kind of problem.

[DroppedMitsu]

the auto are WAY bigger than a KM132. I know because I have had both and put one in the other. There is SOOO much room around my KM132 thats sitting where the 2.6 auto was. And my buddies 2.4 auto is even bigger than my 2.6 auto was.

[noahwins]

I always assumed the floor pan was the same form factor from Mitsubishi since everything else is like Legos. If I do the custom tranny hump thing, I could do one of those nice Lokar double bend floor shifters instead of column mount and clean up the firewall a bit. Maybe this isn't such a bad thing after all. My biggest fear is blowing a million holes through the pan with my novice welding skills. But I guess you have to learn how to do it somehow.

[BradMph]

When I got a doner truck, '87 with an automatic, I never notice the hump any larger then normal and I had to remove the trany and engine. Shipped the trany to Texas and truthfully the part that seemed larger then the manual was below the top half of the trany. Yes it was larger and that is a fact, but it all connected up to a wideblock engine just like a manual trany do also. I find it hard to think they put 2 floor pans in trucks, one for Auto and one for manual. Though they did create a block that was 1 inch wider, so who knows on that. Wonder if the humps were wider only and not deeper into the truck cab area.


13306

The bellhousing diagrams are not compared in size in this illustration. The proportion of the auto trany was shown larger in the ASA program and that's why it appears larger in the image. They are both the same size for mounting to engine blocks. From that point back, the size is unknown in compared to the manual.


1330913311

Here they are in correct proportion. Found additional floor pans styles for possible comparing.

[pennyman1]

The 1st gen trucks definitely have different tunnels for manual vs auto - when I changed out Geronimo's cab for a cab from an auto truck, I had to bend the gas pedal to the left, and shift the clutch and brake pedals over so I could get to the gas pedal. I am still not happy with that setup, so I am going to mod the tunnel so I can put the pedal back where it belongs. If you have the 2 gas pedals side by side, one goes to the left of the pivot(auto) and the other goes to the right (manual), a difference of 2 inches. If the 2nd gen are different, I am not sure, but knowing mitsu, they don't change much over the years in the body department.

[noahwins]

A guy on Facebook said he measured the tunnel on his automatic truck (which he converted to manual) and said it was 13" at its widest point by the shifter and 7" tall at its tallest point.

13307

13308

[pennyman1]

how does it compare to yours?

[noahwins]

I was going to measure as soon as I got home and then I saw my place got burglarized today...

About that revolver I wanted...

[DroppedMitsu]

They are FOR SURE 100% different on 2nd gen trucks, like I said I have had both. When putting the manual into my auto tranny tunnel truck I had to bang the tunnel in closer to the tranny to be able to fit all the pedals in there and not have the gas pedal pushing into the side of the tunnel. There is also no cut out for where the shifter goes in the auto tranny tunnel trucks, another reason I am sure they come with two different floor pans.

[noahwins]

Mitsu switched over from AW372 to A500 (I think) in 1990. So there might be yet another kind of floor pan.

[pennyman1]

that confirms the 2 different floor pans for auto and manual trucks...

[noahwins]

Hey Pennyman, what was this mysterious old school narrow block automatic transmission you mentioned in another thread? I thought all autos were wideblock.

[pennyman1]

3 spd autos from 79 - 86 are all narrow blocks - 2.0 (both astron and sirius) and 2.6 motors. They are even interchangeable 2.0 to 2.6 - unlike the manuals in the same timeframe.

[noahwins]

That 3 speed being the A904 "Baby Torqueflite" right?

[pennyman1]

that is correct - a aisin warner built baby 904 under license from mopar - not interchangeable with an american 904. So what did the thiefs get out of your place?

[noahwins]

The AW gears or case is not interchangeable with Mopar? Because I started emailing around about re-gearing the overdrives in the AW372 and R5M21 to make them more diesel friendly. But the gear guys said there are no on the shelf parts for those trannies anymore. And custom cut OD is probably way too expensive for me.

I used an online calculator and running fat boy 29" tires would get 65 MPH revs down to about 2100. But I don't know if those would fit under a RWD truck with a 2/3 drop.

Local methheads got two heirloom rings, my poker bankroll and a jump drive with Bitcoins. BTC were a bad idea. I was too embarrassed to tell the insurance adjuster how much I actually bought them for when I told her the market price today. They did not take my sweet fixed gear bike or computer for some reason. And thank God they did not find the garage clicker and take my tools or parts or damage my vehicle.

I feel so foolish for not putting the stuff in a safety deposit box at the bank but I wanted to have cash ready if I wanted to play cards or the zombie apocolypse started or whatever. I told you guys earlier that quality of life type crime was getting pretty bad in this neighborhood so I bought renter's insurance when I got new auto insurance this year. So I'll be able to recoup at least some of the losses, I hope. Enough to get out of my lease and GTFO of here. I'm kinda sick of Cali to be honest.

Getting more jaded as I get older. I hope I don't become cynical.

[pennyman1]

whats BTC?

[Rahtid]

Here are some options for for a manual transmission http://www.billsautofab.com/recent_mit.asp for automatic https://www.gearvendors.com/hrdodge3s.html there are more option to try but i would look at these first.

[noahwins]

Bitcoin.

[BradMph]

whats BTC?


1 Bitcoin equals

273.55 US Dollars


in addition:
Founded in June of 2012, Coinbase is a bitcoin wallet and platform where merchants and consumers can transact with the new digital currency bitcoin. We're based in San Francisco, California.

Bitcoin is the world's most widely used alternative currency with a total market cap of approximately $5.3 billion. The bitcoin network is made up of thousands of computers run by individuals all over the world.



did I just school Pennyman?:shock:

[pennyman1]

wasn't sure of the acronym - can't believe methheads know about bitcoin or what to do with them... I am well aware of bitcoin, just don't have any - not sure I like a currency that was never physical in nature, and can go poof with a keystroke. Now the IRS wants their piece, so you can't hide money there anymore...

[noahwins]

Oh, they have no idea WTF the files are. I barely understand bitcoin math too. All I know is other people think they have value so it worked for me. The drive was wrapped in the bankroll and is probably in a gutter somewhere now.

At first I wanted to move but then I got angry. I got a big pickaxe handle from the garage like Walking Tall. It's weird, this turned into a huge kick in the ass to get this truck done and humming. I was in despair upthread. Now the obstacles don't feel as big anymore. Funny how life works. My boss gave me the day off to take care of my business. Pretty great guy.

Walt said on Facebook be thought a 29" tire on 16x7 wheels would probably fit in the wells of my RWD with a 2/3 drop.

[noahwins]

Here's another question for anyone who knows: Is there an aftermarket floor shifter available for the AW372?

[pennyman1]

can't you use a shifter out of a montero or montero sport? If its cable operated it should work - you would have to wire in the neutral safety switch

[noahwins]

Great idea.

[noahwins]

Riddle me this truck geeks:

What's the difference between 2.4 5 speed manual transmissions with these two different specs: GDL and GDAL?


Part Number MB861687 MANUAL TRANSMISSION ASSY. Period: 1990.10.1-1991.05.3; Part Spec: R5M21-1-GDL


Part Number MR179735 MANUAL TRANSMISSION ASSY. Period: 1994.06.1-1996.05.3; Part Spec: R5M21-1-GDAL

To add another twist, there was also MB861688 which was an R5M21 5 speed that came with the GFL specification.

Any ideas? :shrug: