Ok I can't find any evidence that it's been done before. Is it worth doing?

Ok I can't find any evidence that it's been done before. Is it worth doing?

Don't know iffen I would want to replace my tranny with a xfercase.

some people make my head hurt :shaking:

Uh... I was refering to mating the 205 with the ax-15 ass hat :flipoff2:

No sense of humor...

I would think the NP231 with SYE would be plenty strong behind an AX15.
Then again, I can't see putting money into the 231 either.
Replacing the 231 with the 205, iffen done cheaply enough, would allow someone to upgrade a piece at a time. That would be alot eaiser for my to pass by my wife.

No sense of humor...

I would think the NP231 with SYE would be plenty strong behind an AX15.
Then again, I can't see putting money into the 231 either.
Replacing the 231 with the 205, iffen done cheaply enough, would allow someone to upgrade a piece at a time. That would be alot eaiser for my to pass by my wife.

Thats my reasoning. I have the 205 on the truck I took my axles out of. I think I might be able to install it with twin sticks for cheaper than I can install an hd sye on the 231. Plus I really want a gear driven and twin stickable t-case. Plus it's already a drivers side drop.

shoot, go for it. I have my axles out of a 77 ford truck. If I can get the 205 to mount up, then I only have the motor and tranny to worry about later.. :D

Thats my reasoning. I have the 205 on the truck I took my axles out of. I think I might be able to install it with twin sticks for cheaper than I can install an hd sye on the 231. Plus I really want a gear driven and twin stickable t-case. Plus it's already a drivers side drop.

I do not see how you are going to get a 205 to 231 adapter for less than the cost of a SYE kit.
Have you ever priced out the cost of adapters?

I do not see how you are going to get a 205 to 231 adapter for less than the cost of a SYE kit.
Have you ever priced out the cost of adapters?

As far as I can tell they don't make an adapter to go from the ax-15 to the 205. I am starting to think it would be easier to swap the tranny and t-cases out. Don't the small block fords have the same bell housing pattern as the AMC I6's? I'm at school right now so I havn't been able to pull the t-case to see what it would take. I have acces to the mechanical engineering machine shop so I think I could make the adapter as long as the input splines will work.

another problem with the 205 is the low range (or lack of)...at only 1.98:1 (or something real close to that)...most make up for that with either a doubler, low first gear in tranny, or deep gears in your axles...FWIW:D


BTW, the 205 is a sweet case though, but it weighs a ton;) (I personally would do a flipped D300 if it were me:D)

why not use a 203/205 doubler behind the ax15? You need a lot more wheelbase though. The 203 is easy to mate to a ax15. Do any of the 205's even have a 23 spline input? I would worry about busting the housing on the ax15 with a 203/205 behind it. The 203 reduction box weighs 100lbs by itself, the 205 has to weight 100+lbs as well. Thats a lot of stress on the aluminum housing.

I second the flipped 300 option, especially if you have free access to a machine shop, it can be done cheap.

This is for an xj so wheel base isn't really a concern. I guess I'll hit the junk yard tommarow and see what I can find. A t-case is only $26 so I might pick up a 203 and a 300 if I can find one.

why not use the 435 out of that ford truck too? Then call advance adapters and order the adapter and you are done... o
that would be around $300 to $400 cheaper then sye kit! plus a low first gear....

If you want to use an NP435, just get a T150/T176 bellhousing from a CJ (L6, or V8), and bolt it up.

I have an AX-15 and a Ford NP205 T-case in My YJ.
I used a Klune-V to mate them together.
Im swapin out My drivetrain and not using the Klune-V so why dont You buy My Klune and use it on Your Jeep :D
The Klune more than makes up for the high gearing in the 205.

Wow, the np435 has a 6.68 1st gear! With the gearing on that I might only go with 4.56's or 4.88's for my 36"'s. CJ's are almost non existant in junkyards around here but I will look around. Who makes a good (cheap) adapter? This is looking like a better option.

why not use the 435 out of that ford truck too? Then call advance adapters and order the adapter and you are done... o
that would be around $300 to $400 cheaper then sye kit! plus a low first gear....


How do you figure that:question: :confused:
An AA adapter is going to cost $300 - $600. Plus the cost of redoing BOTH driveshafts. Also the cost of a bellhousing (usually around $200 from J&W or even new from Parts Mike), new clutch disc, slave cylinder, hydraulic line to the slave, mods to the skidplate. Most SYE eliminator kits are running around $300, some even coming with a driveshaft for around $400.

While I much prefer the option of the NP435/205 combo, it is going to cost significantly more than just doing a SYE.
I think you need to listen for a loud popping noise before throwing around money figures........
You know, the popping noise your ass makes when you pull your head out of it :flipoff2:

I would be concerned about longevity of the unibody on a XJ with a lot of really low gearing in the drivetrain from stacked gear boxes. The unibody has to absorb the torque reactions from the drivetrain.

Don't know iffen I would want to replace my tranny with a xfercase.

jk, that was pretty damn funny!

Sleeving the frame rails is in my future so the unibody should be okay. What bellhousings can I use? I haven't been able to find many answers better than "an older AMC." I wan't to do this swap now but I don't have the cash for an adapter.

Sleeving the frame rails is in my future so the unibody should be okay. What bellhousings can I use? I haven't been able to find many answers better than "an older AMC." I wan't to do this swap now but I don't have the cash for an adapter.


Look for Parts Mike on the web. ;)
Mike is THE MAN for these kinds of parts. His prices are really good.

If you want to use an NP435, just get a T150/T176 bellhousing from a CJ (L6, or V8), and bolt it up.

I have a line on a t150 bellhousing. What will I have to do to make this work? Just notch it for the cps? can I use my hydraulic lines or will I have to make some? I'm just trying to figure out what to expect.

I would be concerned about longevity of the unibody on a XJ with a lot of really low gearing in the drivetrain from stacked gear boxes. The unibody has to absorb the torque reactions from the drivetrain.

Don't believe the hype. Oh and get some experience with an XJ, ZJ, WJ or even a MJ before you make statements like that. I have lots and can say without a doubt that the unibody is WAY stronger than you are giving it credit for.

Idahoxj- First where in Idaho are you? College? Please don't say BSU.

Second here is a link to what I am doing right now. it is a 203/300 combo. All behind a AW4 (same pattern as your AX 15. http://mallcrawlin.com/phpBB/viewtopic.php?t=34

My cost so far is Zero. But once finished it will be about 2k total. While that is a ton of money it is better than a 203/205 doubler, stronger than a 231, more diverse than a Atlas or any other Tcase by itself. It is easy to do in stages as well.

the 435 will bolt up to a jeep 6 cylinder bell housing and just use a slave cylinder (it's external) from an old iron duke (old jeep 4 banger)
that's the advice that advanced adapters gave me.