AX-15 problems solved. Trans WAS full to the top - Jeep Wrangler Forum

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Old 04-18-2011, 06:41 AM
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AX-15 problems solved. Trans WAS full to the top

Just figured I'd throw this out to anyone who MIGHT have some shifting problems with the AX-15.

Quick bit of info. Purchased out 89 YJ with a transplanted 4.2, AX-15 and a Chrysler 8.25 rear end along with some other mods such as a lift etc. Anyway, we bought it knowing it was having shifting problems and assumed it needed new syncro's as it was not happy going between gears w/o matching rpms.

Well after a long cold winter and cleaning up some wiring issues etc I decided it was time to pull the trans and get it rebuilt. When I pulled the shifter out I discovered it was FULL to the very top with fluid. So I pulled the FILL plug and about 3.5 quarts of lube came out. I put the fill plug back in for a run around the block and now it shifts about 80% better.

Keep your fingers crossed that no other damage was done by the P.O. A complete drain and fill with Redline will hopefully cure the other 20% of it's issues.
"Here, hold my beer. I wanna try something"

Jeff & Angel
- 2004 TJ SE 2.4 5 speed, 3" lift with 31's
- 1989 YJ 4.2 5 speed, with 7" lift and 33's
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Old 04-18-2011, 09:42 AM   #2
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Good discovery StinkyMud. The first thing I do when have tranny problems manual or auto is drain fluid and replace.
Diesel fumes make me horny!
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