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General Forums => The Mess Hall => Topic started by: TahoeYJ on April 18, 2009, 05:28:53 PM

Title: AX5 Rebuild questions...
Post by: TahoeYJ on April 18, 2009, 05:28:53 PM
So I'm due for a transmission rebuild... 5th gear's been out since November and after a short highway trip today, my tranny isn't sounding healthy at all.... What sucks is I haven't even had this one in a year...

I've still got my old tranny, so my dad and I (I think) are going to take on the task of rebuilding it ourselves. After talking with him this afternoon he decided to help me out with it, so I've got to go get the tranny and open it up and see what it needs.

What's throwing me off is HOW MANY PARTS THIS FREAKIN' THING HAS!!! I know I won't know what it needs until I open it up and look at it, but is there any rebuild kit that comes with more than just the cluster, bearings and seals? I haven't seen anything that comes with everything I might need. Am I just going to be stuck ordering parts individually? I'm just hoping I won't need a whole lot. 3rd gear is out on the tranny that we're going to be rebuilding. It goes into 3rd and will drive but makes a horrific sound, like heavy equipment/machinery with tracks, driving down a paved street... that's the best way I can describe it. 5th does the same thing in the transmission that's currently in my Jeep...

Anyone on here rebuilt the AX5 before? I've seen a couple rebuild threads on JF, but haven't found much info really...
Title: Re: AX5 Rebuild questions...
Post by: Bounty Hunter on April 18, 2009, 11:43:59 PM
I've seen what's involved in the FSM, I won't tackle a rebuild myself.
Title: Re: AX5 Rebuild questions...
Post by: oldjeep on April 19, 2009, 05:57:51 AM
is there any rebuild kit that comes with more than just the cluster, bearings and seals?

That's normal for a basic manual trans rebuild kit.  The master kits also include the syncros.

Here's a master kit
http://eastcoastgearsupply.com/i-132518-ax5-rebuild-kit.html

I havn't rebuilt an AX5, but have done about a dozen other manual and automatic transmissions.  As long as you have a good manual and the correct tools anyone can do it.  Just takes time and a very clean work space.
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on April 19, 2009, 11:07:56 AM
That's normal for a basic manual trans rebuild kit.  The master kits also include the syncros.

Here's a master kit
http://eastcoastgearsupply.com/i-132518-ax5-rebuild-kit.html

I havn't rebuilt an AX5, but have done about a dozen other manual and automatic transmissions.  As long as you have a good manual and the correct tools anyone can do it.  Just takes time and a very clean work space.
My dad has a good sized work bench in the garage and a bearing press, and hopefully everything else we'll need. I plan on taking plenty of pictures as we pull it apart in case we need a reference as to how to put things back together. My dad rebuilt a couple old 4 speeds wth my grandfather back in the day, but that was a long time ago. I think the both of us have enough mechanical ability to get the task done properly. And at least if it doesn't work out, it's only on us.

And thanks for the link to that rebuild kit, I don't think I've found one as complete as that one. I'm going to go get the transmission today and maybe pull the guts out of it later tonight. Hopefully the hard parts are fine and I can get away with a quick rebuild...

I'm just stoked that I'll have 5th gear again and no vibrations  :weee:
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on April 21, 2009, 10:31:48 AM
Well I went and picked up the tranny yesterday. Depending on how the clutch looks that's in my Jeep, I might use the one from this transmission. Might end up ordering a new one, we'll see... My dad is snagging a piece of 1 1/8" ply from work to make a bench w/ some sawhorses and that will be our workspace as the workbench in the garage is constantly cluttered. I'll be taking LOTS and LOTS of pics for this rebuild! I plan on doing a thorough write-up so others will feel comfortable taking on this same task on their own  :smokes:

I'm just hoping hard parts are OK, so I don't get stuck spending a crapload of money to rebuild it...
Title: Re: AX5 Rebuild questions...
Post by: robswan on April 22, 2009, 03:18:08 PM
I have rebuilt 2 of the AX-5 trannys, and taking the pics is a great idea.  I did that myself.  I haven't found anything but a master rebuild kit for the tranny, and gears or countergears you may need will have to be purchased individually.  But you said you had another tranny.  Take the parts you may need out of the donor tranny.  Just make sure that if you need a gear, take the mate to it out of the donor tranny also.  Don't mix the gears without the mate from the countershaft.  With a bearing press, you shouldn't have any trouble.  I would replace the clutch, pressure plate, input shaft bearing in the flywheel, and the throw out bearing or internal cylinder assy.
E-bay is a great place to find bargains on the clutch kit, and the master rebuild kit.  I was able to purchase both items for around $300, shipping included.
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on April 22, 2009, 07:57:09 PM
I have rebuilt 2 of the AX-5 trannys, and taking the pics is a great idea.  I did that myself.  I haven't found anything but a master rebuild kit for the tranny, and gears or countergears you may need will have to be purchased individually.  But you said you had another tranny.  Take the parts you may need out of the donor tranny.  Just make sure that if you need a gear, take the mate to it out of the donor tranny also.  Don't mix the gears without the mate from the countershaft.  With a bearing press, you shouldn't have any trouble.  I would replace the clutch, pressure plate, input shaft bearing in the flywheel, and the throw out bearing or internal cylinder assy.
E-bay is a great place to find bargains on the clutch kit, and the master rebuild kit.  I was able to purchase both items for around $300, shipping included.
Well there really isn't a donor tranny... We're rebuilding the one that I took out previously, because this one is going bad... And the plan in to just rebuild this one and swap it in place of the one that's in my rig now so I have little to no downtime with it. And with the way this tranny sounds, I think hard parts might be bad in it...

I might replace the clutch while I'm in there, I might not... I haven't had much work at all so I might end up just using the current clutch for now. I don't mind having to drop the tranny down the road to replace it since money is tight  ;)
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on April 23, 2009, 10:37:03 PM
Started tearing into it today... got the rear half of the casing off, slave cylinder removed, front input shaft plate removed, and started removing the gears off the rear section so I could unbolt the plate for the main shaft and slip out the rest of the internals. I'm stuck on getting the shift fork off, I can't tell if the last gear on the cluster is pressed on or is part of the shaft. I've got a free day tomorrow so I'm hoping to at least get everything out so I can see what's bad... I've got a feeling 3rd gear is toasted, which means $$$  :rant:
Title: Re: AX5 Rebuild questions...
Post by: Mr_Random on April 23, 2009, 10:54:47 PM
Before you decide that 3rd is truly toasted, check the shift collar first... mine was broken and it would lock between gears, somehow it was still driveable though.

If you take the front half of the case off first, almost all of the internals should still be attached to the center plate, it should be better for documentation and procedure purposes. I haven't taken an ax-5 apart myself, but I saw mine disassembled at the tranny shop, and have read extensive rebuild materials through the FSM's, seems like a pretty basic transmission, but the biggest problem is the botched overdrive gears.

Has anyone researched on whether toyota transmissions have any swappable parts for ours? Being Aisin-warner and all, I can imagine that some of the cousin transmissions in tacoma's, t100's, and supra's are at least similar?
Title: Re: AX5 Rebuild questions...
Post by: countryboy514 on April 24, 2009, 09:06:48 AM
I've rebuilt an AX5 and it took me awhile. Taking pictures is a good idea....but make sure you note where the shifter forks go. The hardest part of the rebuild is getting the shifter shafts to line up the correct way. Along the outside of the intermediate plate, there are set screws holding a spring and a ball bearing. There are a few of these and they prevent the transmission from being in two gears at once. I have the factory service manual. let me know if you need more help
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on April 24, 2009, 10:24:54 AM
Before you decide that 3rd is truly toasted, check the shift collar first... mine was broken and it would lock between gears, somehow it was still driveable though.

If you take the front half of the case off first, almost all of the internals should still be attached to the center plate, it should be better for documentation and procedure purposes. I haven't taken an ax-5 apart myself, but I saw mine disassembled at the tranny shop, and have read extensive rebuild materials through the FSM's, seems like a pretty basic transmission, but the biggest problem is the botched overdrive gears.

Has anyone researched on whether toyota transmissions have any swappable parts for ours? Being Aisin-warner and all, I can imagine that some of the cousin transmissions in tacoma's, t100's, and supra's are at least similar?
How do I go about removing the front half of the case? I've got a Haynes manual but it's of course not very descriptive... Been looking online trying to find disassembly instructions, haven't had much luck there either. I just want to get it apart to see what's wrong. I'm not worried about tearing the whole thing down just yet, I've got pops to help me with that. And FWIWeverything I've taken off has gone into plastic baggies labeled with what it is and where it goes. Trying my best to stay organized...

What makes me think 3rd gear is bad is that when I shifted the tranny into third and spun the shaft, I could hear it make a knock once it made a full 360* rotation, always in the same spot. It would clunk while driving when it was still in my rig too. Driveable, but I'd just skip 3rd and go straight to 4th which SUCKED.

Again no work today, and although I really need it, I'm going to focus on trying to get this thing apart so I can order parts today hopefully. The transmission in my Jeep right now is getting louder and louder with every mile I drive it, I'll be surprised if it even lasts until I can get this other one finished and ready to swap.

Sometimes it sucks having only one vehicle  :pirate:
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on April 26, 2009, 09:43:39 PM
Almost got the front half of the case off, it's hung up on something. But looking inside with a flashlight, I can totally tell that 3rd gear is bad. There's like 3 or more teeth missing!  :guns:

Looks like there might be some damage to another shaft, dunno which shaft it is, but it's hard to tell if the shaft is s'posed to have the indent it does or not... Gonna be an expensive rebuild... I guess the bright side is that I'll have a nice, almost new tranny  :pirate:
Title: Re: AX5 Rebuild questions...
Post by: Mr_Random on April 26, 2009, 10:08:03 PM
Almost got the front half of the case off, it's hung up on something. But looking inside with a flashlight, I can totally tell that 3rd gear is bad. There's like 3 or more teeth missing!  :guns:

Looks like there might be some damage to another shaft, dunno which shaft it is, but it's hard to tell if the shaft is s'posed to have the indent it does or not... Gonna be an expensive rebuild... I guess the bright side is that I'll have a nice, almost new tranny  :pirate:

Buy an AX-15 and start on a conversion? Compare prices and see what your losses will be! Also consider that you may have to rebuild the ax-5 AGAIN, far before you have to rebuild an ax-15!
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on April 26, 2009, 11:06:49 PM
Buy an AX-15 and start on a conversion? Compare prices and see what your losses will be! Also consider that you may have to rebuild the ax-5 AGAIN, far before you have to rebuild an ax-15!
I realize that and as much as I'd like to do an AX15 swap, it's not gonna happen right now... By the time I swapped tcases or my current input shaft, have driveshaft work done (already rebuilt it a couple months ago too), etc etc I'm almost positive that I'd be in deeper than a rebuild. Also I'm not paying for the rebuild which is really the only reason it's happening, I'm fortunate in the fact that my dad is paying for parts since I've had NO luck finding work. If it wasn't for him, I'd be car-less right now. As my Jeep stands right now it's not even worth driving with how much noise the tranny that's in it right now is making...

God damn AX5 POS  :rant: They just have to go out 'eh
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on April 28, 2009, 04:10:50 PM
Well, this explains why 3rd gear didn't work too well... Sorry for the horrible camera phone pic :popcorn:

At least all the damage is on the same shaft... 3rd gear is obviously toasted so that alone means a new cluster. Hopefully we'll get everything ordered this next week. I also am getting a new clutch to slap in too... It's got 5K on it, but it's in perfect shape, so it works for me!
Title: Re: AX5 Rebuild questions...
Post by: FourbangerYJ on April 28, 2009, 04:48:17 PM
Bummer on the breakage.
If  your gonna toss those gears I'll take em. I'll find a use for them in some sorta art project.
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on April 29, 2009, 11:05:10 AM
Bummer on the breakage.
If  your gonna toss those gears I'll take em. I'll find a use for them in some sorta art project.
Sure thing  :smokes: Better than throwing them away! Sometimes I swear us Four Wheelers are greener than the "greenies" themselves  :pirate:

When they're out and ready I'll let you know!
Title: Re: AX5 Rebuild questions...
Post by: FourbangerYJ on April 29, 2009, 01:08:15 PM
Couldn't agree more!

Thanks!
Title: Re: AX5 Rebuild questions...
Post by: conifergreen on May 02, 2009, 09:22:53 PM
I am pretty upset at what happened to me today with my 1990 YJ Wrangler with a 2.5 litre engine and AX-5 tranny. I was going to change the transmission gear oil myself but because of a bad neck and because it`s such a hassle I opted to take it to a quick lube shop. When the guy doing the work was ready to refill, he removed the plug that says"DO NOT REMOVE" instead of the actual fill plug. I was horrified because I had read that this should never be removed. He quickly figured out this was not the correct hole and put the plug back in. He commented that it was really hard to get out which really upset me. I left the place after he was done and the Jeep drives ok and now it shifts easier with the new oil. However, it really bothered me about what he had done. When I got home I did some more research on the net and found out that this "plug" is actually like a set screw that keeps the internal parts of the tranny in alignment. Now I was really mad. So I called the place and they promised to make things right and are going to send me to a mechanic they deal with to have a look at it. But I don`t think there is really anything that he can do. Now I am worried that the tranny gears inside might not be in proper alignment and will not be meshing properly, causing premature wear on the shoulders of the teeth. A few months from now I could be facing a major repair. Does anyone have any knowledge on this subject and has the removal of this "plug" caused the parts inside to shift out of alignment? Is there any way to check? Is this really what this "plug" does? The vehicle never moved when the oil was being replaces and I believe it was in first gear. I am hoping having it in gear may have kept the tranny tight and that nothing moved inside. Thanks.
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on May 02, 2009, 10:08:01 PM
I am pretty upset at what happened to me today with my 1990 YJ Wrangler with a 2.5 litre engine and AX-5 tranny. I was going to change the transmission gear oil myself but because of a bad neck and because it`s such a hassle I opted to take it to a quick lube shop. When the guy doing the work was ready to refill, he removed the plug that says"DO NOT REMOVE" instead of the actual fill plug. I was horrified because I had read that this should never be removed. He quickly figured out this was not the correct hole and put the plug back in. He commented that it was really hard to get out which really upset me. I left the place after he was done and the Jeep drives ok and now it shifts easier with the new oil. However, it really bothered me about what he had done. When I got home I did some more research on the net and found out that this "plug" is actually like a set screw that keeps the internal parts of the tranny in alignment. Now I was really mad. So I called the place and they promised to make things right and are going to send me to a mechanic they deal with to have a look at it. But I don`t think there is really anything that he can do. Now I am worried that the tranny gears inside might not be in proper alignment and will not be meshing properly, causing premature wear on the shoulders of the teeth. A few months from now I could be facing a major repair. Does anyone have any knowledge on this subject and has the removal of this "plug" caused the parts inside to shift out of alignment? Is there any way to check? Is this really what this "plug" does? The vehicle never moved when the oil was being replaces and I believe it was in first gear. I am hoping having it in gear may have kept the tranny tight and that nothing moved inside. Thanks.
I believe I read that those plugs just keep the gears aligned, so that the transmission will only go into one gear at a time. If it still feels fine, I'd assume everything is OK. Might as well let the mechanic check it anyway. As long as you feel comfortable with him and his decision...
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on May 12, 2009, 11:22:12 AM
Still haven't even ordered parts.... I haven't pressured my dad because I feel fortunate that he's paying for them, but I've been without a vehicle for over 2 weeks now and NEEEEEEEED to find work. And he won't let me us his truck, so I'm SOL...

But- I'm FINALLY taking the tranny down to a friends shop so he can look at it and make sure we get the right gear and shaft, will be doing that at some point today. Hopefully I can get my dad to order everything today or tomorrow... Parts should only take a day or two to come in, and hopefully after that I can get it back together in 3-4 days of working on it.

Gonna pull the Jeep behind the fence later today and start tearing out the old tranny, hopefully will pick my clutch up tomorrow or the next day and slap it in so I've got that much less work to do when it comes time to put the rebuilt unit it...
Title: Re: AX5 Rebuild questions...
Post by: conifergreen on May 16, 2009, 11:43:34 AM
I believe I read that those plugs just keep the gears aligned, so that the transmission will only go into one gear at a time. If it still feels fine, I'd assume everything is OK. Might as well let the mechanic check it anyway. As long as you feel comfortable with him and his decision...

Thanks for the reply TahoeYJ.I talked to a lot of people about this and another mechanic  told me that he believes it keeps the reverse fork in alignment and that if there was no auible clunk when it was removed, I got lucky. I also called a tranny place here in town and the tech there told me that the transmission parts are kept in alignment by the case and not by this plug.Nobody seems to really know for sure. But I have been driving it for a few weeks now and there doesn`t seem to be any problem. So I am keeping my fingers crossed!
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on May 18, 2009, 06:32:15 PM
This absolutely sucks...

I've called/stopped by a handful of shops, and it's going to be pricey regardless of where I go and all tell me I'm better off getting a used one, which is IMPOSSIBLE to find. I'm getting the feeling my dad isn't going to help me with this like he says he is too, we could have ordered parts 3 weeks ago, and he seems in no hurry to buy the parts (I don't mean to bitch, I just think it's up to me to fix it). I called a few other people looking for a used working AX5 and have had very little luck. I called a shop about 30 minutes from here and he said to check back next Wednesday as he's got a 4 cyl rig coming in and he should have a transmission for me. The rig it's coming from must be getting a 6 cyl or Hemi conversion.

It's very discouraging though... I haven't driven my rig in over 3 weeks now and have nothing else to drive, there's 3 trucks at my dads and he won't let me use any of them even when I've got detailing work to do... I go back and forth every day about selling it for cheap just to get a cheap beater. Then I realize it's not costing me anything to keep it, just to fix it. And as much of a PITA it is NOT having a car, I just want to tear the whole thing down and fix every little thing wrong with it and just let it sit till I'm done. Might as well at this point...

I guess I'll see what's going to happen this next week or so...
Title: Re: AX5 Rebuild questions...
Post by: Bounty Hunter on May 18, 2009, 07:02:37 PM
Check out local jeep forums and Craigslist for a used AX5.  I always search all the different craigslists by using google and searching "ax5 site:craigslist.org" .

I had 5th gear go bad in mine, dropped the tranny myself and delivered it to a transmission shop.  They charged me for the clip that holds 5th on the shaft and for minimal labor.  You save a bundle doing this because a big part of the labor is removing and installing the transmission.  You run the risk of breaking the clip again if you shift aggressively and the synchronizers are not replaced.

Regardless of what ax5 you use, or even an AX15 conversion, be sure to use the proper fluid like Redline MT90.
Title: Re: AX5 Rebuild questions...
Post by: TahoeYJ on May 18, 2009, 09:45:49 PM
Check out local jeep forums and Craigslist for a used AX5.  I always search all the different craigslists by using google and searching "ax5 site:craigslist.org" .

I had 5th gear go bad in mine, dropped the tranny myself and delivered it to a transmission shop.  They charged me for the clip that holds 5th on the shaft and for minimal labor.  You save a bundle doing this because a big part of the labor is removing and installing the transmission.  You run the risk of breaking the clip again if you shift aggressively and the synchronizers are not replaced.

Regardless of what ax5 you use, or even an AX15 conversion, be sure to use the proper fluid like Redline MT90.
Well, I don't have to worry now... I guess I was just feeling a little discouraged...  8)

Because I'm picking up an AX5 from a '98 with 88K on it Wednesday afternoon!  :dance: :weee: :hump:

And the best part... Well if I can score one in time... It's only going to cost me a 2" BL for his rig!  :dance: I'm going to call 4WP here in town and see if they have one or can get one by Wednesday morning  :smokes:

I didn't even spot the tranny, my dad did, on CL. I somehow passes over it and he found it after I had looked. I'm STOKED!

As for this rebuild... The parts are simply getting JUNNNKKKEEEDDD!  :blbl: