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post #1 of (permalink) Old 02-27-2000, 12:11 AM
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NP241 bolted up to a NV4500

When I drop my Chevy small block in a go with a NV4500 can I use the NP241 that came with most 4wd Dodge and Chevy trucks?
If NOT, and I go with a Dodge version of the NV4500, can I use the input shaft from a Dodge NP241 to upgrade my NP231 ( the 2.5L version) so that I don't have to go through finding a NP231 input shaft for the 4.0L version?
In my area it is close to imposible to find used Jeep parts.
Thanks

Kirk
95 YJ rio grande
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post #2 of (permalink) Old 02-27-2000, 08:51 PM
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Re: NP241 bolted up to a NV4500

AA sells a book on nothing but the NV-4500, I would suggust picking one up. I would hate to seer you wrong on something that is that expensive. But the way I understand it, the light weight Dodge is the one that you want. The extension housing is the shortest, and the tail shaft has the correct spline count for the 231. Only the early jeep 231's had the 19 spline count, which used the ba 10/5, and all other Jeeps 231's used the 23. The Dodge 231 had the same spline count, but the lip seal area is longer, but I don't think that it interferes. Ram 1500's used this combo with the 3.9's the 5.2's and the 5.9's.

If you want to swap t-cases, read the label on the back. The Jeeps use j-231 meaning jeep, these are light weight. Most Dodges use dhd, meaning dodge heavy duty. The chains are thicker, and there are more planetarys in the recduction. I like the dhd 242, It is the same size as the 231's but have the added shift mode of full time 4X4, which is nice in snow.

The Chevy version of the NV-4500 uses a longer extension housing, and larger output shaft, which is the same size as the Dodge heavy duty. You want the Chevy input shaft for your Chevy motor. AA says something about using their bell housing because the stock Chevy bell housing uses an internal slave cylinder, and the hoses exit the bell housing on the wrong side, and may cause interferance. I don't see why you couldn't just mount the slave upside down, and drill the bell housing for the hydrolic line.

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post #3 of (permalink) Old 02-28-2000, 09:39 AM
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Re: NP241 bolted up to a NV4500

Just to clarify one point. Dorfs wrote:

Only the early jeep 231's had the 19 spline count, which used the ba 10/5, and all other Jeeps 231's used the 23

The 4 cylinders came with 21 spline and the 6 cylinders came with 23 spline.


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post #4 of (permalink) Old 02-28-2000, 12:12 PM
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Re: NP241 bolted up to a NV4500

See I have the the NP231 with the 21 spline, and to fit this to a dodge NV4500( which you sold me on getting) is going to require a change to a 23 spline. Advanced adapters says that only the 95 NP231 has a differnt input shaft then all other years, and they do not stock that shaft, but they give a part number for the shaft. I have heard that the shaft ( from the dealer) can be expensive. So then my choices are to buy this special shaft, or to get a whole differnt transfercase. By the time I get the shaft, and depending on hard hard it is to install (special tools or anything) and possibly pay for the instalation, it may cost the same amount to buy a differnt tranfer case. If I can find a dodge NP241 that will fit on the dodge NV4500, will this set up be too long, and do they make a tailshaft conversion for it?
Thanks Again


Kirk
95 YJ rio grande
post #5 of (permalink) Old 02-28-2000, 01:32 PM
 
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Re: NP241 bolted up to a NV4500

That's why I just said the hell with it and put a TH350 in mine, NV4500 was just being a pain in the butt. I have a 21 spline 231.

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<font color=red>'88 YJ, 4" susp,3" body,33's,283 Chevy V8,TH350,4.11's,D30,D35c</font color=red>
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post #6 of (permalink) Old 02-28-2000, 04:24 PM
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Re: NP241 bolted up to a NV4500

I Know that putting an Auto in would be the easy way out, but to ME (not to imply anything at all) driving an auto is not really driving. I actually get bored when I drive an auto, it seems to take the fun out of it.


Kirk
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post #7 of (permalink) Old 02-28-2000, 04:41 PM
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Re: NP241 bolted up to a NV4500

Just incase anyone is following this, I did a little surfing and found that JB converisons DOES make a short shaft kit for the NP241.


Kirk
95 YJ rio grande
post #8 of (permalink) Old 02-28-2000, 05:44 PM
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Re: NP241 bolted up to a NV4500

The rear of the 241 is longer than the rear of a j231, but they are the same length as the d231. The 241 does have the 23 spline input. If you have a 4500 from a dodge with the 23 spline, the 241 should be a bolt up. The cheby 241 will not bolt up to the dodge tranny. They are a little pricey though, I gave $500 for my 97 241, but only because I knew the guy pretty well. As for the input splines on the 231s, the manuals had the 21 spline and the autos had the 23 spline, or so I found when I was resurching them. Steve

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post #9 of (permalink) Old 02-28-2000, 08:24 PM
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Re: NP241 bolted up to a NV4500

After doing some more searching I think I have found what I need. I can get a NEW Zero miles dodge NV4500, with ALL the adapters to make it work with the chevy with the chevy engine, the mounting hardware,adapter hoses and conections for the clutch and a new input shaft for $2609 from JB conversions. This also includes a new shifter for the NP231 that I already have so that it will not interfere with the tranny. I have seen used NV4500, that come with nothing at all going for over $2500 so I figure this is a pretty good deal since it will cover everything I need. The only thing left to get will be a tail shaft eliminator kit, and I will be set from the bell housing to the driveshafts.


Kirk
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post #10 of (permalink) Old 02-29-2000, 07:00 PM
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Re: NP241 bolted up to a NV4500

That is a real good price. I spent about $2100 on mine, but I didn't need anything at the back but a sealed bearing, and went with the adapter plate to the 258 bellhousing. This makes it about one inch longer than buying the custom bellhousing, but saved me about $350.
There was also big money for freight. FYI, The dealer wholesale cost on new units is only $1200!

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