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Old 09-29-2013, 09:04 AM   #1
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AX-15 Transmission Fluid Change

Hey Guys,

I've been having some trouble with my gears for the past couple weeks and now its stuck in third gear. I've spoke to a couple people and read some threads similar to my problem and they all came to the same conclusion. I have 99 Wrangler Sport 4.0 with 110k running a AX-15 trans. I don't think the fluid has ever been changed or refilled before. I want to do this fluid change by myself and wondering if anyone knew any links on help with this or if anyone could give me some pointers. I NEED MY JEEP RUNNING, i cant see it sit another day. Any help is appreciated. THANKS!

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Old 09-29-2013, 10:28 AM   #2
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A gear lube change isn't likely at all to fix that transmission, being stuck in 3rd gear isn't a minor issue fresh gear lube is likely to fix.

But if you want to try anyway, the drain is at the bottom front passenger side, the fill is half-way up on the driver's side.

Our TJ transmissions are a bit fussy about the lubricants they run on so you can't just use a generic "Manual Transmission Lubricant" like Autozone or NAPA sells. Suitable lubes are a GL-4 75W-90 gear lubricant (VERY hard to find, do NOT use a GL-5 75W-90), Redline MT-90, or a good synthetic 10W-30 motor oil.

Don't worry about the seemingly huge viscosity difference between the 75W-90 gear lube and 10W-30 motor oil. Gear lubes and motor oils are measured on two different viscosity scales & those two lube have very similar viscosities. The manufacturer of your AX-15 approved the use of a synthetic 10W-30 motor oil several years ago since the other lubes I mentioned that were on their original list of approved lubes are very hard to find locally.
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Old 09-29-2013, 11:23 AM   #3
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Quote:
Originally Posted by Jerry Bransford View Post
A gear lube change isn't likely at all to fix that transmission, being stuck in 3rd gear isn't a minor issue fresh gear lube is likely to fix.

But if you want to try anyway, the drain is at the bottom front passenger side, the fill is half-way up on the driver's side.

Our TJ transmissions are a bit fussy about the lubricants they run on so you can't just use a generic "Manual Transmission Lubricant" like Autozone or NAPA sells. Suitable lubes are a GL-4 75W-90 gear lubricant (VERY hard to find, do NOT use a GL-5 75W-90), Redline MT-90, or a good synthetic 10W-30 motor oil.

Don't worry about the seemingly huge viscosity difference between the 75W-90 gear lube and 10W-30 motor oil. Gear lubes and motor oils are measured on two different viscosity scales & those two lube have very similar viscosities. The manufacturer of your AX-15 approved the use of a synthetic 10W-30 motor oil several years ago since the other lubes I mentioned that were on their original list of approved lubes are very hard to find locally.

thanks man i kinda figured that. i just got the plugs open and it is currently draining. i figured id give this a shot before dumping a shit load of cash into into the problem.
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Old 09-29-2013, 11:42 AM   #4
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Does anyone have any idea how much it would cost me to replace or fix the trans at a shop?
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Old 09-29-2013, 02:31 PM   #5
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Does anyone have any idea how much it would cost me to replace or fix the trans at a shop?
It should not be more that $1550 as you can buy a new replacement for that. Or they go for about $700 for a used one, $1200ish for rebuilt. But sometimes you can find excellent deals on your local Craigslist.

Advance Adapters 26-AX15 - Aisin Warner AX-15 5-Speed Transmission Assembly for 97-99 Jeep® Wrangler TJ with 4.0L Engine - Quadratec
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Old 09-29-2013, 02:35 PM   #6
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It should not be more that $1550 as you can buy a new replacement for that. Or they go for about $700 for a used one, $1200ish for rebuilt. But sometimes you can find excellent deals on your local Craigslist.

Advance Adapters 26-AX15 - Aisin Warner AX-15 5-Speed Transmission Assembly for 97-99 Jeep® Wrangler TJ with 4.0L Engine - Quadratec

OMG. I think I might go with the used. hopefully the shop will be able to find one for me from a junk yard
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Old 09-29-2013, 02:43 PM   #7
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$800 + $200 shipping from eBay at Jeep Wrangler TJ Corvette Transmissions AX5 AX15 NV3550 4x3 | eBay but you can very likely find other rebuilt AX15 transmissions by Googling for them.
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Old 09-29-2013, 02:49 PM   #8
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This is a sad day lol. I think i'm going to ride in third to the shop and see what they have to say about it
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Old 09-29-2013, 04:20 PM   #9
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This is a sad day lol. I think i'm going to ride in third to the shop and see what they have to say about it
Replacing a tranny is never cheap...but be thankful its only is what it is for a TJ. I have a friend with a $8000 Acura MDX and a tranny rebuild is $4500...at a discount. Makes me extra glad I have a TJ and parts are relatively cheap.

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