Topic: transfer case swap

[brokenwrist21]

ok so, after doing some thinking, i realized that i would have to a tranny swap as well. I thought about swapping in an ax15, but then thought i might as well go with an nv3550. I realize the electronic spedo problem. There has to be a way to adapt it to fit the yj harness and make it work.

[Bounty Hunter]

Doesn't the '93 have an electronic speedo? What's the problem?

[neale_rs]

Now you are looking at transmission swap and TC swap.  How much will this cost?  How does it compare against an Atlas with no transmission swap, maybe a used Atlas?  Pros and cons as always but it's worth taking a look.

[sharpxmen]

you can use a dakota digital box to get the impulses/mile converted between the rubi output and the YJ PCM. You will need the NV3550 and not the AX15 to bolt the 241OR (for the tailhousing).

[aw12345]

Trans swap isn't all that bad an idea since the AX5 is a problematic trans

[VA_YJ]

I agree with Neil.  If your ax-5 is in good condition, look for an Atlas 4.3:1 or 5:1 with 21 spline input.  For my TJ with a 4.0, I went though all the same options, plus the Dana 300 flip with Lomax 4:1 gears and twin stick.  The atlas and dana 300 are all gear drive and stronger that the OR241.  The D300 flip and 4:1 is slightly cheaper that the Atlas, but the Atlas comes with a warrantee.  Both the D300 and atlas give you a longer rear driveshaft (better drive angle).  If you switch transmissions and need a different input, AA can accomodate.  Go Atlas with cable shifters, 1 inch body lift (for clearance) and you'll never look back.   Good sources for Atlas are Poly Performance (West Coast) and AtoZ Fabrication - ask for Zach (East Coast).

[Jeffy]

I agree with Neil.  If your ax-5 is in good condition, look for an Atlas 4.3:1 or 5:1 with 21 spline input.  For my TJ with a 4.0, I went though all the same options, plus the Dana 300 flip with Lomax 4:1 gears and twin stick.  The atlas and dana 300 are all gear drive and stronger that the OR241.  The D300 flip and 4:1 is slightly cheaper that the Atlas, but the Atlas comes with a warrantee.  Both the D300 and atlas give you a longer rear driveshaft (better drive angle).  If you switch transmissions and need a different input, AA can accomodate.  Go Atlas with cable shifters, 1 inch body lift (for clearance) and you'll never look back.   Good sources for Atlas are Poly Performance (West Coast) and AtoZ Fabrication - ask for Zach (East Coast).

Why run cables when you can just use the universal sticks?  Just curious.

[brokenwrist21]

the yj spedo has sensor thats gear driven in the t-case. my ax5 isnt being problematic yet, but i dont abuse it and i make sure it stays full of fluid. i just want a better transmission, and theres always room for improvement in the t-case area. when the first 241or rolled out, i thought who really needs that for the street, but a few years have gone by i've learned alot gained about of knowledge, and after doing somemore reading i think the 241or is what i want, i wont be using low range alot, but my 231 just isnt low enough sometimes

[Bounty Hunter]

i wont be using low range alot, but my 231 just isnt low enough sometimes

Here in the Midwest 4:1 is often times too low for general trail use.  In my experience it's best to gear your axles lower for best performance on and off road, and keeping the 2.72:1 low range.

Have you regeared your stock axles?  If not, don't look at the 231 as the gearing problem.

[VA_YJ]

"Why run cables when you can just use the universal sticks?  Just curious."

1. Easier to adjust and install - you can adjust the shifting and then put the TC under the jeep
2. To install the atlas, you need to create some extra space - lower the skid, body lift, or 5 pound sheet metal tool (reshape the floor board) - if you use body mounts, the clearance between the sticks and the floor pan is very tight. Of course you can cut the floor...
3. If the body/frame relationship shifts (e.g., laying the Jeep against something) - the sticks can get pushed and the TC pops out of gear

[sharpxmen]

the yj spedo has sensor thats gear driven in the t-case.

that's correct, but it has a signal output (3 wires,  ground, +5v or +8v can't remember exactly and signal), the 241OR has the same output but the impulses/mile is different than the YJ signal, you can use a dakota digital box that can be adjusted to correct the signal output. I'd say that's the least of your worries.
roughly this is what you would need for the swap if you plan to do NV3550 & 241OR:

Dodge Dakota 4 cyl trans bellhousing
in case you have an interrnal slave you also need clutch fork, throwout bearing, external slave and hydraulic line
longer slave pushrod (i think it's about 1/2'' difference)
Camaro 4cyl / 4spd clutch disc
Advance Adapters pilot bushing for NV3500
custom rear driveshaft (i'm not sure about the front)
Dakota Digital signal converter box
some work on the t-case shifter

[Jeffy]

"Why run cables when you can just use the universal sticks?  Just curious."

1. Easier to adjust and install - you can adjust the shifting and then put the TC under the jeep
2. To install the atlas, you need to create some extra space - lower the skid, body lift, or 5 pound sheet metal tool (reshape the floor board) - if you use body mounts, the clearance between the sticks and the floor pan is very tight. Of course you can cut the floor...
3. If the body/frame relationship shifts (e.g., laying the Jeep against something) - the sticks can get pushed and the TC pops out of gear

Have any pictures?

[VA_YJ]

"Have any pictures?"  No, but I will take some and post (after camping this weekend).

[aw12345]

It's tight quarters where the Atlas lives