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Discussion Starter · #1 ·
Ok so this is wierd.

The jeep loses clutch pedal when its cold. If it goes soft while in gear, the clutch engages and moves the jeep (or chokes it down if brake is on).

If however I let the jeep warm up to operating temp (above 170 degrees), the clutch system holds and I don't lose any pedal. Been driving it for a couple days due to snow and don't seem to be losing any fluid from the clutch master cylinder resovior.

I replaced the clutch master cylinder this weekend. Got firmer clutch feel and good engagement on all gears once up to temp. Inspection during the project showed evidence of leakage from the bellhousing (slave cylinder). First time I took it out I had same symptoms on clutch pedal but now I find if I let the jeep warm up first I don't seem to lose any fluid.

Now with 124k miles and 20 years on the clock, I've got think its time to replace the slave cylinder to truly fix the problem, especially with evidence of fluid at the bottom of the bellhousing. I plan do this in the garage with the help of some tools I need to round up first (tranny jack, better air tools). I would just like to wait unitl the temps get out of the teens, above freezing. No one likes busting loose rusted bolts in the cold.

Anyone have an explanation for the reason why the clutch slave cylinder will hold pressure at operating temps but not when its cold? Anything else I can do to buy time before temps get warmer and I can put the cash I need together to do the whole clutch job?
 

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They run the internal slave on those and they are known for doing that what happens is the o rings dry out in them but if u put a new one in it should fix it
 

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Discussion Starter · #3 ·
I figured it was a rubber part in there contracting and then filling the gap back up when it warms up. I read that these are sealed units, not too pricey to source a new one.

It seems like more trouble than its worth to convert to the later model bellhousing and clutch assembly with external slave cylinder. Anybody try that? Searched and came up pretty empty on that but maybe you guys have tried or remember a longer post on some brave soul that did it.

Wish I could convert to mechanical linkages and throw out bearing and toss the hydraulics. That would be a good mod I'd think.
 

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Idk if you could go to a linkage set up on an ax15 the only way I no is to convert it to an external set up or just replace the slave they are like 30 bucks but if I was going to take the tranny off I would get a whole clutch set it will run u about 130 for a new clutch
 

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I just read an article where you can change the internal clutch slave cylinder of a 91 jeep to an external cylinder by changing the bell housing to a later model.
 
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