Clutch Failure Indications? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > Clutch Failure Indications?

August special - FREE XJ Unibody stiffeners when you buy a~Artec JK 1 TON SWAP~Dan's Old as Dirt Birthday Sale!

Reply
Unread 05-08-2012, 02:00 PM   #1
cairopd1069
Registered User
2000 TJ Wrangler 
 
Join Date: Feb 2012
Location: cairo, ga
Posts: 174
Clutch Failure Indications?

Never owned a standard shift for any length of time, but I have driven everything from a motorcycle to a tractor-trailer. I was wondering what are the indications a clutch is going bad. When I let off in first gear, my CJ7 kind of "hops" just a little bit. It may need an adjustment, if that is possible. Just to be on the safe side, I would like to know what to be prepared for.

__________________
I will lift up mine eyes to the hills from which cometh my help. My help cometh from the Lord.
cairopd1069 is offline   Reply With Quote
Unread 05-08-2012, 03:39 PM   #2
IDK
Registered User
1972  
 
Join Date: Apr 2009
Location: Montana
Posts: 1,185
I have never had a clutch go out, but on my buddy's Mazda pickup when it started to go it slipped a lot and you could often smell burning clutch fluid if you were taking off on a grade.
__________________
JpThang
IDK is offline   Reply With Quote
Unread 05-08-2012, 03:45 PM   #3
gojeepin
Registered User
1983 CJ7 
 
Join Date: Feb 2006
Location: Riverview, Florida
Posts: 3,441
What size tires do you have and what's your gear ratio?
__________________
Vibration? Bump steer? Wandering? Read: Steering, suspension, and driveline basics. An article on how it works and where to look for problems.

83 CJ7, 4.1L 6cyl (4.0L bored .030" over), 35" tires, T-5 transmission, Dana 300 TC, Trussed AMC 20.
gojeepin is offline   Reply With Quote
Unread 05-09-2012, 04:21 AM   #4
RWise
Registered User
1981 CJ5 
 
Join Date: Mar 2012
Location: Oakhurst, Oklahoma
Posts: 574
has it been setting? If so it may just be graby and will work out in a day or 2. Do the RPM's raise (in gear and driving) with no more forward motion increase (MPH gain)? If adjusted correctly and it is slipping then you may need a pressure plate and clutch plate, and if you have to go in replace the throughout bearing. (and maybe turn the flywheel surface) How much play at the top of the pedal? Does the pedal come all the way up or can you pull it higher? These can show it needs adjustment.
RWise is offline   Reply With Quote
Unread 05-09-2012, 04:49 AM   #5
Tsjellum
Registered User
1983 CJ7 
 
Join Date: Aug 2007
Location: Cornish, NH
Posts: 3
Sounds like it could be a worn pilot bushing. Does it get worse in 2lo? My drive train tends to make my jeep hop in low range because my motor mounts are failing. Does increasing the rpms make the hopping worse or better?
Tsjellum is offline   Reply With Quote
Unread 05-09-2012, 05:17 AM   #6
Shiftace
Registered User
1977 CJ5 
 
Join Date: Jul 2010
Location: NW Washington
Posts: 698
x2 on the pilot bearing.
__________________
[QUOTE=gpets;10833372]...it is perfectly acceptable to take a sawzall to anything you can't figure out, that is how we all learn.[/QUOTE]


[url]http://www.funnyordie.com/articles/322261cd73/why-internet-commenters-will-eventually-end-the-world[/url]
Shiftace is offline   Reply With Quote
Unread 05-09-2012, 05:23 AM   #7
Matt1981CJ7
Web Wheeler
 
Matt1981CJ7's Avatar
1981 CJ7 
 
Join Date: May 2011
Location: Elbert, CO
Posts: 9,918
Cairo

I chased the same "clutch stutter" you have for a while. Mine got bad enough that it was embarrassing to pull away from a stop with a car beside me. It made me look like I had never driven a stick before.

Based on several recommendations here, I started with the motor mounts. That didn't do a thing to change the stutter, but it did earn earn me a nasty scar on the back of my hand.

Then I tried replacing the tranny mounts, but I knew while I was working on those that it wasn't going to change the stutter. It didn't. Finally I bit the bullet and put a new clutch kit in. The stutter is gone! The Ol' Girl is smooth as butter, again.

If your stutter just started, you can probably drive it while before dropping the coin for a new clutch. It'll get progressively worse, though. If you're like me, it'll start driving you nuts.

Hope this helps,

Matt
Matt1981CJ7 is offline   Reply With Quote
Unread 05-09-2012, 06:04 AM   #8
hp_lovecraft
Registered User
1981 CJ5 
 
Join Date: Sep 2009
Location: Maine
Posts: 969
Stutter us usually a sign of clutch contamination. Oil leaking past the rear main seal, or the tranny input-shaft seal is getting on the clutch disc causing it to get "gummy". So when you go to pull away in 1st gear, it will grab/release/grab/release causing the stutter. It also tends to make it hard to go into reverse without grinding because it might slowely turn the input shaft even when disengaged.

But not sure if it leads to a quicker clutch failure? Mine was that way for years and I just lived with it. Sometimes pulling away in higher rpms seemed to help. As far as grinding in reverse, I'd simply shift into 1st first, then reverse. No grinding. However, my throwout died, and eventually replaced the clutch anyway. The other problems went away.... for now, since whatever was contaminating the clutch will eventually cause more problems.
hp_lovecraft is offline   Reply With Quote
Unread 05-09-2012, 06:31 AM   #9
nichboy
Registered User
1985 CJ7 
 
Join Date: Feb 2010
Location: Oklahoma
Posts: 253
Does anyone have a descriptive drawing of all clutch components and how they all work together.
nichboy is offline   Reply With Quote
Unread 05-09-2012, 06:54 AM   #10
danoh
Registered User
 
Join Date: Jan 2012
Posts: 56
I have just recently installed my starter on my 78 4.2- 258 and I'm trying to start my engine, the starter was letting out this whining noise as we were cranking it. The motor seems to want to start but the starter seems to not want to disengage from the fly wheel. I pulled the starter and there is a chip on one of the teeth in the starter and the bearing in the end seems incredibly sloppy. Has this happened to anyone? In hoping it's not the fly wheel considering it was never touched but I don't know.
danoh is offline   Reply With Quote
Unread 05-09-2012, 06:56 AM   #11
danoh
Registered User
 
Join Date: Jan 2012
Posts: 56
I also pulled the gear in the starter and it moves back and forth smoothly so I don't know if I should just buy a new starter and see what happens or if it's pointless and I need to drop the transmission
danoh is offline   Reply With Quote
Unread 05-09-2012, 07:27 AM   #12
Matt1981CJ7
Web Wheeler
 
Matt1981CJ7's Avatar
1981 CJ7 
 
Join Date: May 2011
Location: Elbert, CO
Posts: 9,918
Dan,

This is thread about clutch stutter.

You should start a new thread to ask your question, instead of hijacking this one.

Matt
Matt1981CJ7 is offline   Reply With Quote
Unread 05-09-2012, 08:00 AM   #13
danoh
Registered User
 
Join Date: Jan 2012
Posts: 56
Ok my bad, didn't mean to offend you man. (greater tragedies in life)
danoh is offline   Reply With Quote
Unread 05-09-2012, 07:30 PM   #14
cairopd1069
Registered User
2000 TJ Wrangler 
 
Join Date: Feb 2012
Location: cairo, ga
Posts: 174
Okay, one of you mentioned the rear main seal leaking on to part of the clutch. I do have a small leak. In 12 hours there is a spot about 2 or 3 inches in diameter in an area under the rear of the engine. It has not been sitting, I drive it everyday. It does not do it all the time, it kind of depends on the terrain, starting on an incline, even a small one, makes it do it. I have not had the jeep that long, so I can't even say if the 4wd works, I know that is a shame, but it is usually on pavement.

Thanks for all the responses!!
__________________
I will lift up mine eyes to the hills from which cometh my help. My help cometh from the Lord.
cairopd1069 is offline   Reply With Quote
Unread 05-09-2012, 08:58 PM   #15
mopar346
Registered User
1984 CJ7 
 
Join Date: Aug 2011
Location: Quincy, Florida
Posts: 2,656
Bring it to the house and I will diag it for you. I would not consider 2-3 inches a small leak, we need to fix that. Itry to address in order.

Shutter on take off is most commonly causes by blued or hot spots in the flywheel, not apparent when fully disengages but can be caused by an oil impregnanted disc.

Worn out pilot bushing will usually be felt as a vibration on decel on in gear, clutch in (worse when coupled with a bad input bearing) and/or of course a squealing noise when the clutch is in.

Lugging or shuttering in gear when letting of the gas is usually a result of gear ratio verses speed or vehicle and RPM.

Clutch adjustment will be indicated by slippage if too tight and can cause the throw out bearing to go bad and incomplete disengagement if too loose, over time just typical wear will create a need for maintenance adjustments, if left undone it can result in incomplete disengagement.

Bad throw out bearing will squeal or worse grind.

Bad/weak pressure plate can cause slipping under pressure accompanied with the smell like over heated brake pads. A pressure plate can also get hot spots and cause a shuttering when released, not apparent when fully disengages.

Wore out disc will cause slippage and the smell.


Danoh, Matt didn't mean anything by it, he's a good guy. We just try to stay on track when we can. Sounds to me like you need to shim your starter. I have also seen it effective to back the starter bolts off slightly and see if that cures the problem, if so tilt the start on the bolts so that the nose cone (and gear) is being moved away from the flywheel, this will usually cure it.


These are just my thoughts, right wrong or otherwise just trying to help.
__________________
Careful your character's showing
mopar346 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.