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That WF guy.
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Discussion Starter · #1 · (Edited)
There have been quit a few questions about "what transmission is in my TJ".

So..... I set down and copied and pasted and did a little color editing, from the TJ FSM's (full service manual)

Here they are.......

Manuals:

AX-5 - 1997-2002
* 5 speed manual
* Used with 4 cyl models
* 10 spline input
* 21 spline output
* Ratios:

1st - 3.93
2nd - 2.33
3rd - 1.45
4th - 1.00
5th - 0.85
Rev - 4.74

AX-15 - 1997-1999
* 5 speed manual
* Used with 6 cyl models
* 10 spine input
* 23 spline output
* Ratios:

1st - 3.83
2nd - 2.33
3rd - 1.44
4th - 1.00
5th - 0.79
Rev - 4.22

NV1500 - 2003-2004
* 5 speed manual
* Used with 4 cyl models
* Ratios:

1st - 3.96
2nd - 2.37
3rd - 1.49
4th - 1.00
5th - 0.83
Rev - 3.54

NV3550 - 2000-2004
* 5 speed manual
* Used with 6 cyl models
* 10 spline input
* 23 spline output
* Ratios:

1st - 4.01
2nd - 2.33
3rd - 1.39
4th - 1.00
5th - 0.78
Rev - 3.57

NSG370 - 2005-2006
* 6 speed manual
* Used with both 4 cyl and 6 cyl models
* 10 spline input
* 23 spline output
* Ratios:

1st - 4.46
2nd - 2.61
3rd - 1.72
4th - 1.25
5th - 1.00
6th - 0.84
Rev - 4.06

Automatics:

30rh - 1997-2002
* 3 speed automatic
* Used with 4 cyl models
* 23 spline output
* Ratios:

1st - 2.74
2nd - 1.54
3rd - 1.00
Rev - 2.20

32rh - 1997-2002
* 3 speed automatic
* Used with 6 cyl models
* 23 spline output
* Ratios:

1st - 2.74
2nd - 1.54
3rd - 1.00
Rev - 2.20

42rle - 2003-2006
* 4 speed automatic
* Used with both 4 cyl and 6 cyl models
* Ratios:

1st - 2.84
2nd - 1.57
3rd - 1.00
4th - 0.69
Rev - 2.21
 

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Knows a couple things...
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That's very cool and useful information, thanks! I have bookmarked your post for a future all-in-one reference. :)
 

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I want to put a 350 in my 97 tj wrangler. I researched some and was told i needed to get a AX15 tranny. My question is does it matter what year it is and what jeep model it comes out of??? I know alot of folks have done this swap so i hope someone can help me. Local junk yard has a few I just want to get the right one. Thanks
 

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Jack Lives Here!!!
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Very nice thread. I've linked it in the TJ FAQ sticky at the top of the TJ Forum. Great information for the masses.
 

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Thank you I emailed Chrysler for my info they sent me the forward gear ratios, and differentials, but not the reverse or the model of the trans :)
 

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hi all,
just wondering if the ax-15 will bolt up to the my 2000 tj? my gearbox (nv3550 i believe) has shit its synchros and i can get an ax-15 for real cheap. fingers are crossed for a yes on this one........
 

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The AX15 should bolt right onto the I6 motor. As it is the exact same one that is bolted to the NV3550
 

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I have a 99 tj with an i6 and the 3 speed tranny and wouldn't mind putting in the 4 speed. Can I do that as a straight swap and do I have to do anything to the computer.
 

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I have a 99 tj with an i6 and the 3 speed tranny and wouldn't mind putting in the 4 speed. Can I do that as a straight swap and do I have to do anything to the computer.
I would bet that you would want to grab the computer and harnesses too. Though don't quote me on that


That is very useful info. thanks distorted!

Quick question though. What does the 10 spline input and 23 spline output mean?

The 10 spline input refers to the input shaft of the transmission that mates to the engine.

Here is my NV3550 input shaft while doing a clutch replacement.


And the 23 spline output refers to the rear shaft that mates to the transfer case.

Here is an image of a AX15 output shaft I grabbed from Novak Conversions



And here is the input shaft of a trans-case
 

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Here is a better picture of the transfer case input shaft. Still attached to the case
 

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Im new to this can i get a tranny from a cherokee or does it have to come from a wrangler. local junk yard is having a sale this weekend but dont have any tj's it is a 4cyl auto 97
 
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