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chevrolet1995
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Apr 24, 2014, 4:17 PM
Post #1 of 7
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5 speed hard to shift
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I just bought a 95 chevy 3500 crew cab, 6.5 diesel with a five speed manual trans. The clutch will engage as soon as the pedal barely moves off the floor. It is very difficult to shift useing the clutch. I have replaced the master and slave cylinders. I replaced the clutch fork pivot ball and the release bearing. A new clutch was put in 6 months before I bought it. The pedal doesnt seem to have very much resistance to it even after changing the before mentioned parts.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 24, 2014, 9:09 PM
Post #2 of 7
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Re: 5 speed hard to shift
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Air in system would do that. Some are fussy to bleed out and you need to rule that out. Both before and after this work with same symptoms is interesting?
Engine off can you see the slave move with a helper applying clutch? Bet not much and air can do that. For now I'd bleed it all out again.
Rare but does flex hose blow up like a balloon while observed? If so that's got to go too and back to bleeding again,
T
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chevrolet1995
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Apr 25, 2014, 4:28 AM
Post #3 of 7
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Re: 5 speed hard to shift
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The flex hose is good. And I watched the movement of the clutch fork and it moves about two inches when the pedal is pushed. I had a guy tell me it could be a bad or warped pressure plate on the clutch. I dont know how this truck was treated before I got it. So anything is possible I guess. I did have the motor out to put a new crankshaft in it but I didnt notice what the clutch was like prier to pulling the motor.
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Tom Greenleaf
Ultimate Carjunky
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Apr 25, 2014, 4:46 AM
Post #4 of 7
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Re: 5 speed hard to shift
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Yes a warped disc could drag. If not all corroded (not so common) that could be from allowing a trans to hang by its shaft on the splines of the disc. I has to be supported till you get a couple bolts snugged up.
You know they layout of it if this shows.......
Not much luck with pics showing but like this with splined center,
You mentioned YOU replaced the "release" bearing which means you had trans out. Was it doing this when you go it or just after working on it?
More common is air with your complaint or any reason clutch isn't releasing fully. Unlikely a bad pressure plate at just 6 months old so IMO the disc got bent or wasn't good from the get go.
I the job was faked you would still shift fine but might shake taking off and not last as long. If driven hard it normally would wear out the disc not what you are describing,
T
(This post was edited by Tom Greenleaf on Apr 25, 2014, 4:49 AM)
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chevrolet1995
New User
Apr 25, 2014, 4:53 PM
Post #5 of 7
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Re: 5 speed hard to shift
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When I got it the motor had a spun bearing in the bottom end so I wasnt able to drive it. So I dont know if this is a problem I caused or was already there. But u mentioned a bent disk from the trans hanging by the splines. That might be the problem. The trans did slip off the jack when I was putting it back in after fixing the motor. It never crossed my mind about it. I will take it back out and see. Thank you for your help and input. I really do appretiate it.
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nickwarner
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Apr 25, 2014, 9:42 PM
Post #6 of 7
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Re: 5 speed hard to shift
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I did the same thing once on a Mack truck. Was a $900 clutch. When I went to try to spline it up I needed to lower it and going into the second disc I hit the release too fast. Bent a disc so little you couldn't see it with the naked eye but did the same thing. A bent disc will do exactly like you have described. When I replaced that clutch (under a very frowning eye from my service manager) the truck was good to go.
Next time you really need to be taking your time on install with this. It takes very little to bend a disc in the clutch as you now see. Be smooth like Keith Stone and it will all go in nicely.
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Tom Greenleaf
Ultimate Carjunky
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Apr 25, 2014, 11:12 PM
Post #7 of 7
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Re: 5 speed hard to shift
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Yikes Nick, that was a costly boo, boo. Chevrolet1995 - been a long time but the weight of a trans on that little splined hole of the clutch disc is no match.
Cross fingers it's never happened to me. My guess is if you laid it out flat you see it and probably wouldn't have to be wildly warped as there's only so much room for the pressure plate to back off with a bent disc in there to fully release.
Before you go back bet if you are on level paved surface and start it in 1st or reverse the truck would about nudge that direction with clutch to the floor. Notice with engine off it will shift nice and smooth too.
As said and know we know what is likely a couple trans bolts must be tight before you release support of trans. So, whatever you have for tools even floor jacks, blocks of wood and a couple real strong people have to be in place for that critical step. A trans jack would hold it to do alone otherwise some risk. Tools all ready and within fast reach for just that time.
What to do? You might get away with just a new disc? If put to a bet I'd say yes if new enough with these parts it essentially was only exposed to like a clutch being "ridden" on too much but it's got to be hard on the trans to do nothing unless you are a very clever driver who can feel RPMs and understand double clutching as if you weren't using a clutch at all which absolutely can be done as the driver if the only one in open space with no obstacles which is unrealistic.
You decide and make the gamble. Been forever for me but thing you might be able to send a pressure plate out for inspection but most weren't costly enough to bother some could be.
I think the key is don't do this alone and have well instructed help that you are at a critical point. Do your best to rule out the clutch and air so you don't waste time but this seems like a warped disc now pretty clearly. Chalk it up to a "whoops" and don't let that happen again,
T
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