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Old 07-18-2014, 12:23 AM   #1
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Transmission question

New to the form and new to Wranglers in general.
I recently purchased a 1990 wrangler with an inline 6 motor.
Unfortunately, I'm having some issues with the gears grinding in 2nd and 4th gear.
My question is can I use the transmission and/or clutch from a 4 cyl, '95 YJ in my '90 6 cyl?
I have the '95, it's just not running too well, and needs a new frame, but the transmission and clutch seem to be I great shape.
Any help is greatly appreciated.
Thanks!

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Old 07-18-2014, 11:29 AM   #2
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Quote:
Originally Posted by scottmkmeeker View Post
New to the form and new to Wranglers in general.
I recently purchased a 1990 wrangler with an inline 6 motor.
Unfortunately, I'm having some issues with the gears grinding in 2nd and 4th gear.
My question is can I use the transmission and/or clutch from a 4 cyl, '95 YJ in my '90 6 cyl?
I have the '95, it's just not running too well, and needs a new frame, but the transmission and clutch seem to be I great shape.
Any help is greatly appreciated.
Thanks!
I would say no. The inline six as far as I know comes with an AX-15, and the 2.5 4 comes with a AX-5 trans, and they are not interchangeable. You may try draining the oil in the tranny and replacing it with Redline MT-90, to see if that would help. You may need a rebuild if that doesn't work

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Old 07-18-2014, 01:19 PM   #3
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Maze is correct. The 6cyl has an AX15 behind it, and the 4cyl is an AX5.

The clutches aren't the same size, and neither is the splines on the output shaft going to the T-case.
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Old 07-18-2014, 04:10 PM   #4
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The AX15 output shaft has 23 splines, and the AX5 has 21 splines, they don't bolt up directly. Look for a used AX15 (external slave if you can), or rebuild the one you have. They're very inexpensive relative to other used transmissions.
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Old 07-19-2014, 09:24 AM   #5
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Thanks!
Found an ax15 for a good price, so I'm planning on getting that.
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