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Old 05-15-2016, 07:25 PM   #1
ak_petey
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Default 241 dodge t case compatibility

I have a 2001 dodge ram 2500 with a 5.9 gasser with a 46re. It has a 241 tcase that sounds like the chain is going out. I also have a 1994 2500 ram with a 5.9 cummins with a 241 t case and an automatic trans 47rh

29 spline in both i believe from what i have read online.
My question is, can i swap in the older t case ?
Im not sure what the 1994 t case is exactly as the factory stamp is missing. Based on the info peovided, is the swap possible?
Or just Lemme know what info i need to provide to come up with an answer
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Last edited by ak_petey; 05-15-2016 at 07:26 PM.
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Old 05-15-2016, 09:34 PM   #2
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Default Re: 241 dodge t case compatibility

Possible speedometer drive/vss conflict or electrical interface (plugs) differences, WAG!!! Maybe able to swap components to make it work, a good trans shop should know. Good luck!
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Old 05-16-2016, 11:58 AM   #3
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Default Re: 241 dodge t case compatibility

Hmm ill put em side by side on the bench when i pull it.
Ill do a short write up too.
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Old 07-24-2016, 09:21 PM   #4
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Default Re: 241 dodge t case compatibility

So my dumbass tried to lift the 241 t case from the 47rh into the 46re .. I got it up there.. Awkward as a mofo. Then found that it wouldnt go in all the way. I thought it was just binding a little and tried tapping it with a dead blow hammer.. No go. So i ended up using a ratchet strap to give it pressure.
Nothing.

Ended up pulling it out and comparing them again. My research says they will swap but i failed to research the trans input shaft length. The np241 off the 46re is shorter than the np241 off thr 47rh. Not sure if i wanna go ahead with this swap at this point unless i can swap the trans input shafts or just trim the output on the np241 from the 47rh...
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Old 07-24-2016, 09:24 PM   #5
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Default Re: 241 dodge t case compatibility

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Old 07-24-2016, 09:27 PM   #6
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Default Re: 241 dodge t case compatibility




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Old 07-24-2016, 09:41 PM   #7
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Default Re: 241 dodge t case compatibility

You mean T Case input shaft? That's what is in your pics.

You can swap the input fairly easily. Just make sure the shell gear has the same gear pitch.

Or pull it out, stick it in a lathe and shorten it.

Or even easier, pull the 2 cases apart and just swap the chain an associated parts.
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Old 07-24-2016, 10:36 PM   #8
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Default Re: 241 dodge t case compatibility

Yes. Tcase input length.
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Old 07-25-2016, 01:41 AM   #9
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Default Re: 241 dodge t case compatibility

After some searching, i am dissapointed on the lack of dodge np241 info out there. However a few vendors explained enough for me to identify my 94 ram 2500 t case. 94 - 97 2500 rams that came without the DHD option came with a wimpy 23 spline input but a decent 32 spline output. The input for my 2001 ram w/5.9 gas motor is also 23 spline.

I read that the 94-97 have a vss on the tail shaft that is in two pieces. Which is odd as my 94 ram has a vss on the rear axle housing too, with a tone ring bolted to the ring gear or is that the ABS sensor? Ive also read the vss on the rear axle is also the ABS sensor in the later 98 and up 2500 rams trucks.

I am hoping that i can swap the 94 t case directly into the 2001 2500 ram pending the swapping of the input shaft. I also read the gears may have been cut differently over the years. If that is the case ill be buying a rebuild kit for the t case that came out.

I am al so hoping to regain my speedometer if i swap t cases entirely or possibly just swap the 2 piece tail housing to the 2001. Hopefully this works out one way or another.

...im trying to not spend any money on this swap!
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Old 07-25-2016, 07:02 AM   #10
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Default Re: 241 dodge t case compatibility

"Wimpy" holds up fine to 500hp-600hp, 1200ft/lbs. Not common to break until high power levels. I broke a Trans output shaft while drag racing in 4wd (too much boost at launch). lt never hurt the t case.

From what i can remember Speedo is off the ring gear on all the trucks I've worked on. I know for sure the 98.5 I had was off the ring gear. Can't remember on my 95.
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Last edited by nate; 07-25-2016 at 07:03 AM.
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Old 07-25-2016, 10:23 PM   #11
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Default Re: 241 dodge t case compatibility

Turns out the 2001 t case input shaft swapped right over to the 94 ram 241 t case. Im glad i pulled the 94 241 t case apart instead of just swapping swapping the tail housings as a retainer clip for the cog that slides up and down with the shift forks and the snap ring were floating around freely. Took a while to get it back in but i got it. Had to stop reassembly due to my snap ring pliers not being up to the task. Maybe ill track down the matco driver tomorrow.
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Old 07-25-2016, 10:26 PM   #12
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Default Re: 241 dodge t case compatibility

The chain that was in the 2001 wheelwr was a bit loose but the chain from the np241 out of the 94 ram was snug enough to bolt it back up.
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Old 08-01-2016, 07:52 AM   #13
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Default vss

Anyone have a wiring diagram for a 2500 ram 94 vss and 2500 ram 2001 vss?
Got the t case back in last night!
Just need to figure my wiring out now due to vss plugs not matching.
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