[Kiwi_TJ]

Hi Guys,

I have a 97 TJ with the AX-15 manual transmission, and 2" BDS lift.

When I lifted my Jeep, I had to drop the TC to get rid / reduce driveline vibrations. I have now got some cash saved up to fix this properly and put in a double cardan rear drive shaft.

My initial plan was to install a standard SYE from JB conversions, but my thoughts are now running to swapping out the TC to a 241 from a JK Rubicon, assuming I can find one at the right price.

Would this be a direct bolt out - bolt in swap?

Any pros or cons either way?

Bye for now

[Unlimited04]

Its not quite a direct bolt up for you. You have to do some skid modifications to get it to fit, since there was a change in the skid after 03. Theres a write-up on here somewhere about it.

I personally chose to do the NV241J instead of a NP231J + SYE, mostly because I have a 42RLE and can buy a Rubicrawler. This basically gets a 4-speed box, without the need to change driveshafts, and without major mods - will basically look stock. - plus I don't loose gearing.

The major thing you need to ask is if you can accept going twice as slow. The 4:1 is often called too slow by some people, and they wish they had 2.72:1. 4:1 is AWESOME in rocks, but not good on sand or in snow. 2.72:1 is much better in snow and sand, but works OK in rocks.

As for a NV241J from a JK - thats a good idea, if the spline counts, shaft lengths and bolt patterns are the same. The JK has both 2.72:1 and 4:1 versions of the NV241J.

[Bennettj13]

I too have been tossing the idea of a JK transfer case around. Since I'm swapping in JK axles and doing a little stretch, it would make the DS work a lot easier. I just don't know yet, I've not compared costs yet. Where are you sourcing your 241 from Unlimited?

[Unlimited04]

Originally Posted by Bennettj13

Where are you sourcing your 241 from Unlimited?

mine is from a 2005 Rubicon auto w/ 26k. got it from Gerald(provelogear) of Savvy Off Road. its wheeling next to the futon until I can afford everything else that goes along with the swap....AA cable linkage, new driveshafts & adjustable control arms.

[Bennettj13]

Ah, I was under the impression you were doing the JK transfer case. NM. Thanks though.

[alecmcmahon]

will a 241 bolt into a 2.5L w/ AX5 tranny ?

[tooofast]

Originally Posted by alecmcmahon

will a 241 bolt into a 2.5L w/ AX5 tranny ?

that i dont know.. as for someone that has a 241 in their jeep its bloody fantastic.. Just finished Rubicon run this week.

Ask if any rubicon owners would swap to a 231 and see what they say.. i think its the best mod i have done and if it went wrong i would get another in a heart beat..

it was bolt in for me on my 99 6cyl Skid plate mod is easy to do.. PM me if you have any questions.

Dave

[alecmcmahon]

if it bolted on to your ax15 it prob means the spline count is different then? ( for bolting on a ax5 )

[Jerry Bransford]

Originally Posted by alecmcmahon

will a 241 bolt into a 2.5L w/ AX5 tranny ?

No, the spline counts on the AX-5 tranny output shaft and 241 input shaft are different.

[Kiwi_TJ]

Thanks for the feed back. Just to clarify I am thinking of putting a 241 from a JK into my TJ - we did not get the Rubicon TJ over here, so the only source of 241 transfercases would be from wreaked JK's

Good point about the 4:1 gear ratio, there is a guy in our club with a JK Rubicon who has done a lot a Jeeping in it, so I will ask him how he finds the gearing and decide from there. I did not realise that the 241 came in both gear ratios, might have to look into that a bit more.

Modifying the skid for the new transmission mount is not too much of an issue for me, I was more wanting to check that it would bolt up to my AX-15 with no worries?

[Goobersbro]

I have two questions the first is would it bolt up to an ax-15 in my 91.... are the splines in the ax-15 the same through the years....


so I have a similar question as the OP. Would it be better for me to buy a Tera 4:1 kit and SYE kit for my 231 or get a NP241 and buy a SYE for it???

[Unlimited04]

Originally Posted by Goobersbro

I have two questions the first is would it bolt up to an ax-15 in my 91.... are the splines in the ax-15 the same through the years....


and secondly does the NP241 come with a SYE or is this something I would have to add If I did the swap???

I believe the spline counts are the same (03-06 NV241 at least - 23 spline). If it bolts up, dunno...a few AX15+NV241 swaps have been done in TJs, I know that much.

The 241 doesn't have a SYE (it would need a slip yoke in the first place for it to be eliminated) - its got a fixed flange output. This allows you to bolt a CV shaft on it, which has a fixed yoke end...very similar to a SYE.

[marylandjeeper]

i've been thinking about the very same thing. i haven't done enough research into what it takes to swap a 241 onto an ax-15, which is what i have. if you compare the costs of a sye and terralow 4:1 conversion to the price of a 241 it makes a lot of sense.

[Sweeney]

I swapped a 241 into my '98 TJ and loved it. In situations where the 4:1 was too low I simply selected a higher gear in the transmission. 2nd gear w the 4:1 is essentially the same 1st w the 2.72:1 box.

[Goobersbro]

Originally Posted by Unlimited04

I believe the spline counts are the same (03-06 NV241 at least - 23 spline). If it bolts up, dunno...a few AX15+NV241 swaps have been done in TJs, I know that much.

The 241 doesn't have a SYE (it would need a slip yoke in the first place for it to be eliminated) - its got a fixed flange output. This allows you to bolt a CV shaft on it, which has a fixed yoke end...very similar to a SYE.

okay thanks that helped a ton..... Now just the question of how long the distance between that fixed yoke and my rear axle is and if I would need a SYE or not I imagine I will