Leaky clutch hydrolics - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum

Join Wrangler Forum Today

Thread Tools Search this Thread

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 08-16-2013, 11:33 PM
Thread Starter
jyp's Avatar
Join Date: Feb 2012
Location: Montreal, Quebec
Posts: 155
jyp is on a distinguished road
Leaky clutch hydrolics

Haven't been here in a while. But fate has me calling upon the wisdom and experience of the good folks of WF today.

I was driving down the busiest street in Montreal when suddenly my clutch failed completely. Within the span of two traffic-logged streets it went from suddenly tough to change gears to completely locked. Turns out I was completely out of clutch hydrolics fluid so basically pressing on the clutch pedal didn't disengage it anymore.

It took me forever to figure out where the reservoir is (in the brake fluid reservoir, in a separate basin that fills up when the reservoir is topped off) and where the slave cylinder is but I eventually was able to fill it back up, bleed it and drive away. I stopped every few minutes to check the level (I wanted to refill it before I need to bleed it again) but it seems to be holding steady. The leak must be a very small one.

Which brings me to my question: which part should I be checking for leaks? Where do these leaks typically form? Before I bled it, I noticed some wetness around the bottom of the trany where the clutch housing meets the transmission housing. But I don't really see how that could come from the clutch hydrolics. A slow leak is tolerable for now, but I want to fix it before winter.

Who here knows about clutches and can give me pointers on finding the defective piece? Anything "typical"?
jyp is offline   Quote
Old 09-02-2013, 10:53 PM
Thread Starter
jyp's Avatar
Join Date: Feb 2012
Location: Montreal, Quebec
Posts: 155
jyp is on a distinguished road
So it was the slave cylinder.

I noticed that the oil kept leaking from between the clutch housing and the transmission housing. The rate of the leak and the color of the oil made it pretty clear this was my brake fluid. Couldn't figure out how it got there. Bought a new slave cylinder (70$). Took out the old one. Looks like the seals around the piston working end were worn out so the piston was pushing out some oil along with it. It all makes sense now. Easy fix and no more leak.

I spoke to a parts supplier who said he was selling 90 clutch slave cylinders a week. Apparently it's a common problem on JKs. For anyone caught with a dead clutch, here's how it went for me: after filling it and bleeding the line (bleeding is a PITA: the valve on mine was really rough and I needed to use a wrench in that cramped space; also the line is long and you need to do it at least 3 times but more like 5 times to fully purge out the air) I could drive for roughly two days before refilling. Kept an eye on it while I waited for the part to arrive. The leak got bigger fast. Within two weeks, I would fill it at night and it would be empty in the morning (requiring a new purge). So don't wait too long if you have the same problem.

jyp is offline   Quote
Old 09-02-2013, 11:02 PM   #3
JKjingle's Avatar
Join Date: Dec 2012
Location: Canada
Posts: 208
JKjingle is on a distinguished road
Good info!
JKjingle is offline   Quote
Old 09-02-2013, 11:14 PM   #4
mattdenney07's Avatar
Join Date: Sep 2011
Location: Las Vegas, NV
Posts: 288
mattdenney07 is on a distinguished road
I feel you man.. I've been through a couple slave cylinders and a master cylinder. They get easier to change I promise! Also, I ended up buying a vacuum bleeder hand pump thing from autozone and I pre-filled the slave as much as I could before I installed it, which I like to think helped. Glad to hear you got it running again!
Mine: 2012 Crush JKU
Hers: 2008 Red Rock Crystal Pearl JKUR
mattdenney07 is offline   Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 11:48 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC
« Back

Enter your email address:

Delivered by FeedBurner