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post #1 of (permalink) Old 01-24-2004, 01:52 AM Thread Starter
 
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YJ - Input shaft bearing shot?

Recently I began having a shifting problem with the AX-15 in my 90 YJ.

It's really hard to put into any gear with the engine running, though it shifts fine with the engine off.
It makes a nifty little sound like something rattling around right underneath the transmission cover in the tub..this noise goes away when the clutch pedal is pushed to the floor.

I checked the clutch master cylinder and it is full of clean fluid even though it was last bled/filled over 3 months ago. Theere is also no evidence of any fluid leakage around the master cylinder nor around the bellhousing that would indicate the slave cylinder is leaking. I may be wrong but this tells me that the clutch hydraulic system is fine.

Does this sound like the input shaft bearing, a pilot bearing, or something else?
If it is one of those bearings then could I replace just the bearing without having to replace the clutch/pressure plate/flywheel (which was replaced less than a year ago when I had a new slave cylinder put in)?
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post #2 of (permalink) Old 01-24-2004, 07:38 PM
 
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Re: YJ - Input shaft bearing shot?

Well, you could leave the clutch components in place, sure, but, say it *is* an input shaft bearing, that involves pulling the trans and tearing it apart. I say it's time for a rebuild (again, assuming your guess is correct.) At that point you're already several hundred in the hole, and you may just want to at least slap a new clutch disc in there.

-p
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post #3 of (permalink) Old 01-24-2004, 10:11 PM
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Re: YJ - Input shaft bearing shot?

</font><blockquote><font class="small">In reply to:</font><hr />

It's really hard to put into any gear with the engine running, though it shifts fine with the engine off.

[/ QUOTE ]
This could be a pressure plate among other things.

</font><blockquote><font class="small">In reply to:</font><hr />

It makes a nifty little sound like something rattling around right underneath the transmission cover in the tub..this noise goes away when the clutch pedal is pushed to the floor.

[/ QUOTE ]

This is most likely the input bearing. It sounds like a muffled idling diesel ...and yes, it stops when the clutch is engaged.

Some outfit on ebay has a rebuild kit for the AX-15 for $180. It includes the bearings and the soft metal sinchros and blocker rings. Just search AX-15 on ebay motors in the trans section.

I can understand that you don't want to spend the cash to replace the "almost new" clutch and pressure plate ...but if I go to all the trouble of yanking the trans ...I don't want to do it again (I'm lazy). Once I actually get in motion ...I try and get the most mileage out of it that I can [img]images/graemlins/grin.gif[/img]

That is, I agree with YJO ....
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