Swapping ba10 to ax15. speedo gear? - JeepForum.com

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post #1 of 91 Old 01-01-2014, 07:02 PM Thread Starter
huskerconan
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Swapping ba10 to ax15. speedo gear?

So everything I'vve read says the mechanical gear from the ba10 will work on the new ax15. I've pulled both mechanical gears out and they are different. Myh question is do I take the gear off the stock speedo cable with the little square shaft left on the end of the cable and install it into the new ax15 gear? Not real clear on what to do. I will know if this will work next week when we install the new tranny and transfer case. Thanks

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post #2 of 91 Old 01-02-2014, 10:21 AM Thread Starter
huskerconan
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No advice? Thanks
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post #3 of 91 Old 01-02-2014, 12:13 PM
Mark05059
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what was the original transfer case? if it was a NP207 then things are a little different. If it was a NP231 then its a little easier...

1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
/l , [____],
|---L--[]lllllll[]-
()_) ()_)==O=)_)
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post #4 of 91 Old 01-02-2014, 12:34 PM Thread Starter
huskerconan
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Replacing both transmission and transfercase. Both trannys have the internal slave so no problems there. I guess I'll know more once we go to install. Pilot bushing is my first hurdle also. Working on that
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post #5 of 91 Old 01-02-2014, 12:46 PM Thread Starter
huskerconan
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I guess I didn't answer your question. It was the 207 I believe.
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post #6 of 91 Old 01-02-2014, 12:49 PM
Beachcruiser
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My new set up was from a 90 YJ w/ the 231 (like my 87 had) so there was no problem. The pilot bushing was the same too if you have the small point input shaft AX-15 (90-91 I think).


Later AX-15s with the large shaft take a bushing from a 70's CJ w/ the 301 & manual trans if mated to a 4.2 flywheel according to what I've read.

probably out breaking stuff.
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post #7 of 91 Old 01-02-2014, 12:51 PM
Mark05059
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ok so lets be clear here.. the transmission has nothing to do with the speedometer... you have 2 different transfer cases. Does the old speedometer cable thread on to the adapter in the new case? If it does then there is no problem. If it doesn't (or its electric) you will need a different cable if it has threads or an adapter from a 231np up to 91 and a new cable.

1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
/l , [____],
|---L--[]lllllll[]-
()_) ()_)==O=)_)
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post #8 of 91 Old 01-02-2014, 01:19 PM Thread Starter
huskerconan
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When I bought the tranny\transfercase the guy told me it was out of a 1990 yj. It had the internal slave so I figured it to be right. But in doing some research the larger input shaft (.750) came with the later years of yj's. This one had the larger input shaft so I guess I'm lost. On the newer transfer case the speedo attachment came apart in two pieces where the cable would go into. The first part I pulled apart had a small square shaft going into the next part of the connection. I pulled this part off and it had a gear on it. Much bigger then the one off my 87. I'm hoping I can take the gear off my cable which should expose the small square end and that will go into the second part of the newer setup. Its really cold here so I won't be out in the shop at least till Monday where i can heat up the shop. Just trying to do some homework before I go out. thanks for the help
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post #9 of 91 Old 01-02-2014, 02:11 PM
Mark05059
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so you have a cable driven speedometer in the new transfer case?

1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
/l , [____],
|---L--[]lllllll[]-
()_) ()_)==O=)_)
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post #10 of 91 Old 01-02-2014, 02:27 PM Thread Starter
huskerconan
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I guess. There's a gear but different size. Also the hole in the case is a lot bigger. They are definitely not the same
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post #11 of 91 Old 01-02-2014, 03:31 PM Thread Starter
huskerconan
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So I took a gander at the speedo brackets again. On the ax15 it has a gear on one end but on the other end there is a three prong electrical plug. So I have to believe it is an electrically run speedo. My next question would be if I have to stay with an electric speedo whats my choices for donor vehicles? Thanks
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post #12 of 91 Old 01-02-2014, 06:28 PM
Mark05059
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you really don't want to try changing to an electric speedometer.. Easiest way is to find any np231 transfer case that is before 91 (Cherokees included) and remove the adapter and the speedometer cable.

1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
/l , [____],
|---L--[]lllllll[]-
()_) ()_)==O=)_)
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post #13 of 91 Old 01-02-2014, 06:42 PM Thread Starter
huskerconan
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Kinda what I was figuring. Find it odd that no adapters are made from like AA. I've read a few writeups and it was never really discussed. Suppose I'll try and find something that will work. Thanks
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post #14 of 91 Old 01-02-2014, 07:01 PM
Mark05059
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actually you can purchase an adapter from the bigger box stores that will do both electric and mechanical speedometer... its got to be for a 91 yj engine doesn't matter. You will still need a new speedo cable I believe.

1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
/l , [____],
|---L--[]lllllll[]-
()_) ()_)==O=)_)
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post #15 of 91 Old 01-02-2014, 07:10 PM Thread Starter
huskerconan
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Bigger box? Over my head. Thanks though. I'll look into it.
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