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Old 04-11-2013, 12:12 PM   #1
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AX-15 which T case?

I have an AX-15 transmission in my 88 YJ (upgrade from the B/A-10) married to a NP231 T-case.

I have been looking at the Dana 20 Ultra low twin case setup and was wondering if their was someway a way to couple it with the AX-15, is it a good idea (is the NP231 a better option?)

To go further more into detail...

I am looking to do an SOA on a Low pinion Ford 9 Inch on a 3.5 suspension lift so the greater the distance from the T-case yoke to the pinion yoke is preferred, which has less depth?

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Old 04-11-2013, 01:16 PM   #2
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20's front drop is on the wrong side isn't? Or can you clock it? 231 will give a lower low range in stock from.

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Old 04-11-2013, 01:38 PM   #3
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I would do a dana 300 before a dana 20. Lower low and a stonger case. You can flip the dana 300 to drivers drop and it is one of the shortest cases imput-output.

It is also 23spline imput you just need the adapter ring to your ax15.
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Old 04-11-2013, 01:53 PM   #4
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Nice I will have to check out the Dana 300. Found a couple on CL for pretty cheap those are pretty easy to rebuild?
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Old 04-11-2013, 02:01 PM   #5
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Quote:
Originally Posted by JoopMan88 View Post
Nice I will have to check out the Dana 300. Found a couple on CL for pretty cheap those are pretty easy to rebuild?

Yeah. Prettu basic cases. Cast iron gear driven and lo-max makes a 4-1 kit for around $500 I think.
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2.5/ax5/ 231-300 doubler, 10b front (Reid knuckle, chromos, lockright, ORD/4ws hi steer, 14bff , detroit, discs, pinion guard) Warn x800i w/synthetic line, York OBA, Cage, Flat belly, miniboatside, tube fenders, xj rear springs, yj fronts , bilstein 5125s, comp cut, 104WB, H1 Double beadlocks, 37in Goodyear mtrs

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Old 04-11-2013, 02:03 PM   #6
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Just measured mine and imput mounting flage to inner part of yoke were u joint cap goes is 11inches.
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2.5/ax5/ 231-300 doubler, 10b front (Reid knuckle, chromos, lockright, ORD/4ws hi steer, 14bff , detroit, discs, pinion guard) Warn x800i w/synthetic line, York OBA, Cage, Flat belly, miniboatside, tube fenders, xj rear springs, yj fronts , bilstein 5125s, comp cut, 104WB, H1 Double beadlocks, 37in Goodyear mtrs

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Old 04-13-2013, 01:19 PM   #7
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Cool thank you for the info and the measurements I'll post pics when i start the project

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ax-15 , dana 20 , np231 , swap on trans parts , transfer case

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