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Unread 09-09-2013, 09:16 PM   #1
CherryCj7
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Will the BA-10/5 hold up?

Hey guys, I am looking into getting a Comanche to replace my POS Samurai. The only problem is that it is extremely difficult to find one with the AX-15 and 4.0. I have found several around my area 1987-1988 with the "5-speed" guessing because of the years to be the BA-10. I want to put a 4.5" rustys lift on it and 31-32" tires. Will the BA-10 hold up to city driving and possible light off-roading until the summer rolls around and I can swap in an AX-15 and D-300? I know a lot of it depends on how beat the trans already is, but from what I have read it sounds like you can look at the BA-10/5 funny and it will explode... Any thoughts? I absolutely will not be able to do any work to the trans until the summer rolls around, so doing that right when I get it is not an option. Thanks everyone!!

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Unread 09-10-2013, 01:03 AM   #2
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Originally Posted by CherryCj7 View Post
Hey guys, I am looking into getting a Comanche to replace my POS Samurai. The only problem is that it is extremely difficult to find one with the AX-15 and 4.0. I have found several around my area 1987-1988 with the "5-speed" guessing because of the years to be the BA-10. I want to put a 4.5" rustys lift on it and 31-32" tires. Will the BA-10 hold up to city driving and possible light off-roading until the summer rolls around and I can swap in an AX-15 and D-300? I know a lot of it depends on how beat the trans already is, but from what I have read it sounds like you can look at the BA-10/5 funny and it will explode... Any thoughts? I absolutely will not be able to do any work to the trans until the summer rolls around, so doing that right when I get it is not an option. Thanks everyone!!
Start looking for an AX-15 or NV3550 to replace it now, so you're not stuck later. I've posted details on donors and swapping, there's a whole thread on BA-10 -> AX-15 swaps at NAXJA, and I went through FOUR BA-10/5s in my 88 XJ (gears are too hard for the application. I'd strip first & second gear, end up driving a two-speed in 3d & 4th until I found a replacement box...)

And no, I didn't abuse the poor things...
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Unread 09-13-2013, 04:09 PM   #3
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I beat my BA 10/5 pretty hard (it was rebuilt by a Peugeot mechanic who complained that Jeep messed with the specs which caused the trans deaths) and it went on to another truck after 200,000 miles (I now have an AW4)
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Unread 09-13-2013, 06:18 PM   #4
CherryCj7
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Thats good to hear carnuck. I have heard that you can beat them a bit, but more than not I hear theyare horrible. I'm not completely sold yet, but I just need it to hold up for a little while. At the most until I graduate college in two years... To hold out for an AX-15 comanche or to buy a BA-10/5 Comanche... hmmm
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Unread 09-16-2013, 07:10 PM   #5
87MJTim
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I have an 87 MJ since day 1. It's been my DD for most of the time. Currently has 281000+. It has the BA10. I've never had a problem with it. Of course, I don't do major offroading. It had never been serviced until this year. The whole truck is being restored, engine rebuilt, trans and tcase re-sealed.

That said...it does have the awful internal slave. I've had to replace the internal slave at least 4 time.

If you can find an AX15 with the external slave get it. I believe that began in 96 with the AX15.

Get the tcase that goes behind the AX15. The tcase from the BA10 will not fit. The spline count on the shafts are different.
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Unread 09-16-2013, 07:18 PM   #6
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Quote:
Originally Posted by 87MJTim View Post
I have an 87 MJ since day 1. It's been my DD for most of the time. Currently has 281000+. It has the BA10. I've never had a problem with it. Of course, I don't do major offroading. It had never been serviced until this year. The whole truck is being restored, engine rebuilt, trans and tcase re-sealed.

That said...it does have the awful internal slave. I've had to replace the internal slave at least 4 time.

If you can find an AX15 with the external slave get it. I believe that began in 96 with the AX15.

Get the tcase that goes behind the AX15. The tcase from the BA10 will not fit. The spline count on the shafts are different.
Any year AX-15 can be used in an external slave arrangement, with very little work.

Internal slave AX-15s were used mid-'89 through '93, external slave models started in '94.

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Unread 10-21-2013, 11:10 PM   #7
carnuck
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BA 10/5 CAN be modded to external slave. If I hadn't broke my shoulder, I was going to finish the conversion on mine but I sold the trans with all the parts (AX-15 arm and external slave from a Peugeot 505) I had to drill a hole for a pivot ball for the arm. (universal pivot ball from the "HELP!" rack)
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Unread 10-21-2013, 11:53 PM   #8
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Quote:
Originally Posted by carnuck View Post
BA 10/5 CAN be modded to external slave. If I hadn't broke my shoulder, I was going to finish the conversion on mine but I sold the trans with all the parts (AX-15 arm and external slave from a Peugeot 505) I had to drill a hole for a pivot ball for the arm. (universal pivot ball from the "HELP!" rack)
While the most useful thing a Jeeper can do with a BA-10/5 is to break it down for scrap (case & synchros are aluminum, shafts are steel,) how's this mod work? Sources for parts? I'm curious...
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Unread 10-22-2013, 01:38 AM   #9
carnuck
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Pivot ball from "HELP!" rack. Clutch arm from AX-15 or AX-5 (I forget) sleeve from same trans and external slave. Possibly from a Peugeot 505
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