Which pilot bushing? - JeepForum.com
 
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post #1 of 8 Old 03-03-2013, 09:19 AM Thread Starter
95yj0645
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Which pilot bushing?

I have a 93 4.0 with an 88 258 crankshaft. Which pilot bushing do I need to get to bolt my ax15 up to it?

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post #2 of 8 Old 03-03-2013, 11:11 AM
JeeperDon
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I'd say for an 88. Ask Rock Auto.

'93 YJ, '02 GM 4.3V6, SOA, dual ARB's, 8.8+D30(WarnHubs), 4.88s, 35" BFG KM2s, AX15, NP231+4:1+SYE+2LO, York OBA, Warn M8000.
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post #3 of 8 Old 03-03-2013, 11:15 AM
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Advanced adapters. The 88 bushing will not fit the input of your ax-15. When I put my 4.0L HO infront of my early style AX-15 I used a 258 bushing and tunred the OD down in a lathe so it would fit the 4.0L crank.

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post #4 of 8 Old 03-03-2013, 11:17 AM
JeeperDon
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It's also a function of what you are plugging into it. Different transmissions over the years have different pilot bushing ID needs.

'93 YJ, '02 GM 4.3V6, SOA, dual ARB's, 8.8+D30(WarnHubs), 4.88s, 35" BFG KM2s, AX15, NP231+4:1+SYE+2LO, York OBA, Warn M8000.
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post #5 of 8 Old 03-03-2013, 11:33 AM
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Quote:
Originally Posted by JeeperDon View Post
It's also a function of what you are plugging into it. Different transmissions over the years have different pilot bushing ID needs.
That is what I was getting at. Mine was a 1990 ax-15 which had the small input they used behind the 258. If your ax-15 is the stock 1994 that came with it the input will be larger. Now if you did have the early style ax-15 you would just use 80-91 6 cyl. CJ/YJ bearing. Your best bet would be call Advanced Adapters and tell them what you are trying to do and they will hook you up with the right bushing.

1981 Scrambler, Vortec 350,4L60e,D300, Currie 9" F&R
19xx YJ/CJ/TJ/XJ/Waggy thing 4.0L H.O., AW4,
NP231 w/HD SYE,D44 locked/D44 w/LSD,4.09 gears
Build thread http://www.jeepforum.com/forum/f12/m...igheep-534340/
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post #6 of 8 Old 03-03-2013, 04:07 PM
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I don't remember which year the pilot snout increased from 0.590" to 0.750", but if you have the smaller one, a stock pilot bushing will work from an '88. If you have the larger one you'll likely need to get a custom one that fits the ID of the crank shaft and the OD of the transmission.

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post #7 of 8 Old 03-03-2013, 04:56 PM Thread Starter
95yj0645
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Sounds like I just need to mic the crank and the input shaft and go from there. I believe it is the newer style ax15.
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post #8 of 8 Old 03-03-2013, 05:54 PM
JeeperDon
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It's a cheap part. Buy both, then tear into it knowing you're covered.

'93 YJ, '02 GM 4.3V6, SOA, dual ARB's, 8.8+D30(WarnHubs), 4.88s, 35" BFG KM2s, AX15, NP231+4:1+SYE+2LO, York OBA, Warn M8000.
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