Anyone have an AX15 laying around?

Joined
Jan 12, 2008
Location
Cabarrus County, NC
I want to see if this bellhousing I got is a fit and overall do some measurements before I go find one of my own.
I'm working on an idea that has spawned about two decades now on various internet forum boards. Pirate has most of this covered and 4x4wire if anyone remembers that!

The premise is this: The Aisin R series trans is pretty much interchangeable with so many other Models, you just have to know what to swap. Toyota mini trucks, tacoma, t100, colorado, trooper, soltice, sky all used a version of the R series trans. Nose cones a little different across the models. Spline length and spline count changed per model trans too. Output shaft diameter and spline count as well as bolt pattern varies wildly across all of those models.

The goal is to get lower gears in the Isuzu without breaking shit and breaking the piggy bank too. I'm already 3:1 with the gears I have but would like to get to 4:1 or lower for more control.

There has been a handful of guys who have used an Ar5 bell and swapped input shafts over to an R150 trans and gone dual cases Yota, Marlin crawler gears and a bunch of adapters and input shaft swap-outs.
I've seen one of these in person and talked to a guy from out west that did it in his Amigo with Marlin way back in the 2000s.
Now I just don't think the dual cases and 23 spline stuff is gonna hold up unless I get the high dollar cromo output shaft. Plus the money into the adapters, you may as well buy a dang toyota. There is even a crawl box you can buy to put in between the Chain case on the r150 and the trans output. That's high dollar too.

Anyhow, there is another method I want to try out. Ax15 to Dana300 with 4:1 and 1310 yokes to connect my shafts and be near the same driveline I have today.
How am I gonna do that? Good question, I'm not sure yet but here goes...
For like 2 or 3 years only the dakota 2.5 wasn't the same as the 2.5 amc motors (IIRC) This was around 96-98ish. I'm pretty sure the five speed for that model was a 2wd AX15 but I'm not 100% certain.
The bolt pattern on the back of the engine was 60° which is what the GM stuff is and Isuzu (even thought the 3.2 and 3.5 are 75° motors) I'd like to see if anyone nearby would let me bolt up this bellhousing I have to an AX15 and do some measuring.

Now if this works, I think I need to find certain models AX15 as only a few were external slave.
If you guys know which ones, post up. I heard it was 95-99 but I don't know if only the wranglers had them. If more jeeps had an AX15 with external slave, that gives me more options at junkyards to go chase down.


What you guys say? Thoughts? I figure I'd share my thoughts here and see if anyone has a trans I can go check out.


if this don't work, I may chase down the r150 dual case route but get a soltice ar5 so I can swap input shafts. It turns out that those Ricer guys want the shorter input shaft for a 2jz bellhousing to bolt to the soltice/sky ar5, whereas we want the longer shaft for the ar5 on the trooper bellhousing. So win-win to cover the costs of one Trans by selling another but still a money pit when you have to put in dual cases and an adapter.
 
I have a couple ax-15 laying around and can measure anything you need. Currently running ax-15-300 combo if you need measurements. Currently have external slave on, but used to run internal slave. Clutch pedal throw is also different between the two also. I know 95 has external slave and 91 and older is internal slave. All r150 are external slave.

I know I’m miles away but let me know how I can help.

I’m fluent with complete disassembly. Should be able to use any input and bellhousing that are matching on any trans. Same is true for using Saturn/Chevy stuff on ax/150 trans.

Also I believe all Cherokee were external slave but never confirmed this.

Just don’t over travel an external slave and master, the master will stick in the bore. (I have a rock duck taped under my pedal after my last trip)

But you need small 60* Chevy pattern bell housing on ax-15 to d300?
 
I remember you saying a few years ago you wish you had a 3:1 option and a 4:1 option on the 300 you have now.
I seen the atlas or stak (irrc?) has a 2 speed option for 4 low.
That would be cool but pricey. I'm not trying to be cheap or go more hairgel fast. I'm also thinking that if I gear it down too much, I will be adding more torque to the load and possibly just break more shit.

Anyhow, since you're my huckleberry, I'll take some pics with some measurements on the nose cone side so we can compare bolt holes and input position.
For the AX15, can you get me the length from nose cone face to rear output? and Measure from the face to the shifter hole?
Scotty I appreciate your help! Thanks!
 
If this works for you I'll probably be next in line for it :beer: following.
 
I know I figure this is up your alley too with the 3.4 motor and the weight we have.
Wish you-know-who would just cough up off that dual Mua5 setup. But that's another story we'll save that for another day.
 
Didn’t you struggle really bad with driveline length? In my opinion I’d just run a NWF eco box infront of the Dana 300. Better gear options. Grab a 32 spline output shaft for the 300 and roll on. They might have an eco box that can adapt to your current trans.


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Nick, Not really unless I’m in 4wd high. And I’m going to correct that by going High pinion. Shouldn’t be in 4wd going fast fast anyhow. The rear shaft is good even at full droop. If I went any shorter in the rear I may have to double cardan it but don’t know yet with this idea ^^^ that’s another part of this science project. :huggy:
 
Check @yager's Jeep build thread, too. He used an Aisin with a solstice bell housing behind a ecotech, and had some info on what swapped with what.
 
Found the thread. @yager if you still have that 2.5 gm pattern dakota bell, let me know or @paulevans76 know. He may want it. Seems like you didn't want to use that and that is the bell we need.
I have one already. Seems Mike was doing something similar.
I prefer to use the driver side slave bell I have and get a fork and throwout and see where we land.
Only thing I see being obstacle now is flywheel thickness and diameter and possible contact area overrun. Haven't sized those up yet truthfully. Figure I'd go to parts store or order everything and return what I don't need after measuring shit.

But you need small 60* Chevy pattern bell housing on ax-15 to d300?
sorry I didn't answer your last question scott.
Here is what I have. I'll need to figure out starter hole on the other side but we'll cross that bridge later.



bellhousing-1.jpg bellhousing-2.jpg
 
No, I did not have a 2.5(60' pattern) to r150/ax15 'Dakota' pattern, bell-housing.
I switch to the Ecotec motor before i bought a 'Dakota' pattern....
I do have a Ecotec to r150/ax15 bell-housing FS: $200 :)
 
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