A_Jeepr

I did a tranny swap a year ago or so, reusing the stock '89 clutch and flywheel. The BA/10 to a '95 AX-15 external slave. Everything worked just fine.

Now, the clutch is on its last legs. The '95 clutch is $80 cheaper and a single piece ($80) than the '89 clutch, which is a 2 piece. Of course I would like to swap this clutch. However the part #s are different, and I looked at the dimensions in the book (I'm a saleman at a parts store) and they are super close.

10.5 OD disk on the '89
10.4 OD disk on the '95

Flywheel # is different, but they are the same OD.

CPS #s are different. But the connectors are the same.

Same starter #s.

Not sure if it would work, but im assuming I can't unless I do something special with the CPS.

Would like someone elses 2 cents on if I should go for it or not. The engine is a '95 4.0 HO block and internals, but the Renix system and computer is on it.

A_Jeepr

Ok so I figured out somethings. The '89 and '95 flywheels are same dimensions, except the CPS tone ring is different. SO this means it won't work. However.

The clutches for the '89 and '95 are the same aside from the fact that the finger height is much taller in the '95 than the '89 which is in there now.

I have also got reason to suspect that using the '95 bell housing, and the BA/10 clutch is what caused the clutch to wear out like this. The shorter fingers don't allow as much release of the clutch per throw of the slave cylinder. In layman's terms, the clutch is dragging every time it would be disengaged.

I think grouping everything by the same years, all '95 components. Would be the best option.

PingPong

NO it just means you have to use the correct year flywheel, but what ever clutch you decide.


I have a 98 TJ AX15 in my rig, using a 90 xj dual centerforce clutch on my 87 motor. All bolted together and has been in my rig for 2.5 yrs

MallCrawlXJ

whatever year the flywheel is, is the clutch you need.

PingPong

Yes and no.. a 10.5 clutch is a 10.5 clutch. Like I said.. if splie count matches it really doesnt matter

A_Jeepr

yea i got all that, however the CPS sensors is different, and the flywheel ring for the CPS is different. I can use the '89 renix flywheel in it now, and use the '95 clutch, along with the '95 bellhousing and slave cylinder and everything will work. What I can't figure out is why the finger heights differ so much, about .630 inch, between the clutch in it now, the ba/10 and the '95 ax15 clutches

I drove on this clutch about 30k mikes last year and its gone out, granted it was used, but when I inspected it when I was installing it it was in great shape

A_Jeepr

see difference in the tone ring

A_Jeepr

OK OK !

I finially figured it out. I got bored at work and did some digging for a few minutes.

Bellow is the Brute Power (ZOOM) clutch book. im opened to the page on the Jeep Cherokees. I have a squigle next to the year's clutches part numbers in question here.

We got

'95 - 90342
'91 - 90442
'89 - 90441
'89 (Ba/10) - 90414

alrighty. Ba/10 is a internal slave, the '89 ax-15 is internal slave, the '91-'92 ax15 is internal slave with improved bearing design. THE '95 ax-15 is external slave.

to prove this there is a suffix "16" which reads "Slave cylinder is included on release bearing."

Also proved it again in the online catalog listing. Different slave cylinder numbers!

SO different finger heights based on type slave cylinder and bearing design.

Well, with the external slave ax-15 you must use a clutch from '93 up to prevent premature failure because the clutch will not release fully when disengaging the clutch, creating the same effect as slipping the clutch when shifting or holding the clutch at a stoplight or sign.

A_Jeepr

Doing the work next weekend at my friend's shop. see how it goes.

A_Jeepr

broke my hand yesterday. im gonna have the shop install it for me next thursday

A_Jeepr

ok, so been about a month riding on the new correct clutch. the old disk was burned and cracked, and had some chunks missing in the material on the pressure plate side. Surface of the plate was scored with bluing. Obviously my theory was correct and the diaphragm was not moving in full travel when the throw out bearing pressed against the fingers when disengaging the clutch; resulting from friction, heat and rapid wear of the parts. Finger heights of the new and old clutch was roughly .128". Enough to do damage over time.

So in conclusion, clutches DID CHANGE, and I recommend to match transmissions year with the clutch you desire to use.