clarkerussell

The NV3550 is coming out of a 2000 XJ... Also, I meant to say NP242, not NP241... sorry...

My mistake... Yes, it's an NP242... The manual tranny is out of a 2000 XJ.

My 4x4 conversion is coming together and I have sourced an NV3550 tranny for a fair price. I have an existing NP231 that was behind a 1988 4.0 Auto that I was thinking of using, but would rather have the NP241. I've read that the NP231's behind a 4.0 were always 23 spline input shafts.. is that correct? As for the NP241, since they were behind Automatics, is the input shaft a different length? Long story boiled down to a simple question... If I get a 2001 NV3550 and a late 90's NP241, will they match up? Thanks for everyones help and patience.

Gotcha... If the NP242 is going to be too big of a pain, I'll just use the NP231 and change out the input shaft... That shouldn't be too hard, should it?

I'm assuming I need to get a new clutch since the old tranny is the Peugeot BA10... If so, and I'm getting an NP3550, I'm guessing I need to get a clutch for a 2000+ XJ with a 4.0, right? Thanks in advance.

Peugeot is toast... I'm replacing it with an NV3550...

I don't understand what you mean by Ds not working... What are Ds? (Please don't say Ds nuts...)

OK, I just heard from my mechanic in North Carolina. He will convert my 4x2 to 4x4, and install my new transmission, for a grand total of $800... I'm pretty sure that's a good price, but I just wanted to bounce it off the group. Clarke

Excellent info. So it looks like as long as I get a 1991 or newer NP242 it should mate up with an NV3550, right? Thanks again! Clarke

Both cars are 1988 MJ's with the 4.0. The donor car is an Automatic, mine is a manual. My plan is to use a newer NV3550 from a 2000 XJ (23 spline, right?) and an NP242 from something else for the full-time 4x4 option. I need to make sure I get a 23 spline NP242 to match the NV3550. Is there an easy way to search for one of these? For instance, are all NP242's 23 spline after a certain year? Also, is the NP231 that's in my donor truck a 21 or 23 spline? Thanks.

OK, So I sourced a 4x4 MJ as a donor to my 1988 4x2 MJ. I'm planning on using the front and rear axles, driveshafts, and transfer case. Since the donor car has 130K+ miles on it, is there anything I should look at replacing while the swap takes place? Should I rebuild anything? Should I be replacing bushing or anything? Thanks in advance. Also, does anyone know the spline count on a stock transfer case from a 1988 4x4 is 21 or 23? Thanks. Clarke

By the way... why wouldn't you want to resurface the fly wheel?

Well, since I'm not going to be doing any serious off roading, I think the NV3550 and NP242 should be fine... I just want a good 4x4 truck for use in bad weather and the occasional trip down a bad road... Besides, I can get an NV3550 for about $550 and the NP242 for about $275... I think this is a pretty good price, but I could be wrong...

I have a new clutch, but it's for my old BA10... Do you know if the clutch and pressure plate are the same? If not, what clutch would I need to get? Would I need one from a newer XJ that the NV3550 came from? Thanks. Clarke

OK, so it looks like if I get the NV3550 (23 Spline) and a post 1991 NP242 (23 spline), I should be good for the tranny/transfer part of my conversion. Now, since I'm putting this in my 1988 4x2 Comanche, I will need to shorten the drive shaft. Is that the only other thing that I'll need to do right away? Are there any other "Gotcha's"? I'm planning on adding the front axle shortly, but I have to get my truck on the road ASAP... Thanks.

OK, so if I get the NV3550 (23 Spline) and a post 1991 NP242, I should be good. Now, since I'm putting this in my 1988 4x2 Comanche, I will need to shorten the drive shaft. Is that the only other thing that I'll need to do right away? I'm planning on adding the front axle shortly, but I have to get my truck on the road ASAP... Thanks.

Does anyone know if the NP242 will bolt directly to the NV3550, or do I need to find a specific NP242? I think the NV3550 is a 23 spline output... I just don't know about the NP242.. Thanks. Clarke

Cool. I'll proceed forward with the NV3550...

First off, why would someone want an internal slave cylinder? Secondly, was the AX15 made with either an internal or external slave cylinder? If both, what years were external? Lastly, is the NV3550 an internal or external slave design? Thanks in advance. Clarke

I keep hearing that I need to buy the 1989 manuals for my 1988 since the books are better than the 1988 and prior years. Does this hold true for the newer books? For instance, is the 1991 Jeep FSM backward compatible? Thanks. Clarke

Are the manuals still available from the dealer? Are they still being published?

Supposedly it's from a 2001 XJ. Would the front axle from this jeep work in my 1988 Comanche?

Cool, I found an NV3550 for $600 with 57K miles on it. I think I'll go that route. Now I just need to find an NP242, front axle/drive shaft, etc. Speaking of the front axle/drive shaft, does anyone know if the front shaft if different between the NP242 and the NP231? Thanks. Clarke

OK, I found the 1988 version but it looks like it's not a "real" manual. It looks like it's a 3rd party manual for the Cherokees. If I can find a good FSM for the 1989 Cherokee's I'll cut the spine off and scan all the images.

Is the NV3550 bellhousing compatible with the 1988 4.0L engine? In other words, if I decide to source an NV3550 and I get the tranny and bellhousing, will it bolt to my engine, or do I need to get an AX15 Bellhousing and the NV3550? Thanks. Clarke