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Gear change catching gears

K

kmdavis

New member
Hi

964 C2 manual 64,000 miles.
When changing gear despite pushing the clutch pedal all the way down I can feel a notchyness on the gear change. This happens in all gears and it does not matter weather I change gear slow or fast.The clutch seams to bite at the bottom end of pedal travel. I have no record of a clutch change.
Recently went on a spirited drive in Wales and the clutch pedal stuck in the down position, then self released never happened before or again.
Any clues???
PS going to have my car set up by Chris at C of G
 
Keith,

I think the first suspect might be the clutch slave cylinder. If you get the clutch hydraulics bled with particular attention tothe slave cylinder you might find the situation improves. I've certainly seen mention of some people having to replace the slave cylinder to solve similar problems and that would very much tie in with the non-returning pedal too. My guess is that it's not the clutch itself although it's best to reserve judgement on that until you've attended to the less expensive potential solutions!!

I'd recommend that you try to get the clutch issue sorted before your visit to CofG - the very last thing you want is to go on one of Chris's "test" drives with a dodgy clutch!! You might think the word "test" in this context refers the the car but, believe me, you won't think that afterwards!!!

Regards

Dave
 
I agree with Dave, clutch bleed and gear box oil change should be tried first as they are much cheaper than a new clutch.
 
I agree with Dave,
I would say its the clutch slave cylinder also. The seals tend to wear out and the cylinder passes thus resulting in the pedal staying on the floor. A good test would be if you pumped the clutch pedal a couple of times before changing gear it may improve. Also try bleeding the clutch to see if there is air in the system.

Cylinders are not that expensive and it would be worth replacing this before spending big money on a clutch replacement. I dont think that the clutch is at fault because generally they begin to slip when worn out.

Hope this helps

Tim
 
Thanks to one and all.. I will do as suggested. I am confident that it is not the clutch itself?.This chat has reminded of one other fault, when I have the clutch pedal fully down in grear, the clutch occasionally is dragging ie not fully disengaged. Does this reinforce the therory of a bleading issue????

Had a day with Bernrd Aubury last month in the 964. Certainly had some great tips and has made me feel more confident about my driving at speed round corners. The issue of lift off in the midle of a bend, there remains a sufficent level of control.Its not a lost situation.Biggest issue is that with Conti N2's is there is no warning.

Many thanks Keith.
 
Keith,

With regards to your Conti's letting go without warning, do you know what set up you are using. Possibly a question that answers itself if you are about to visit Chris. This may cure the issue.

I ask as I'm running Conti's with RS geo, coil overs etc. and the comments from the instructor (after 20 mins round Silverstone GP) was how benign my car was. It could be pushed in to both predictable over and understeer. I'm looking to make the setup even more focused and he warned about not going too far and losing the predictable handling and making it more difficult for myself.

moog
 
Could be the hydraulics else a worn clutch - how many miles has it done. If it does not squeal it is probably the hydraulics. Worn clutches will let out the occasional squeal esp in reverse. A clutch should be good for 40,000-50,000 miles.
 
My cars done 105,000 miles and I have a full set of recepts back to the original purchase invoice. On none of them can I find a clutch change. I can't actually believe it's never had a clutch change and I am not 100% but that's what the paperwork says.

It is definately due though. Getting notchy, the odd squeal when reversing, etc. All the signs there.

Is it really likely to be on the original clutch?

Ian.
 
I have not heard of any 964 getting to over 100,000 on an original clutch - but if you have great. But the notchy/squeal would be explained by that!

Most I have heard about get to the 50k-60k mark and then need new - not always because they don't work but because they start to squeal, judder and don't engage well. On a C4 the dual-mass tends to go at around this point as well - the rubber justs starts to crack apart. I have heard of 964 clutches going in 25k miles - so 50k-60k looks good to me! The clutch fork also gets worn by then too.
 
My thoughts exaclty Colin. Would hope for a few more K than 40 - 50 k. Of course it all depends on the type of driving! and how good or bad you are with your left foot. Ian's milage doesn't surprise me, although from what you describe, it might well be time. I have full documented history on mine and the clutch wasn't replaced until 82,500, so it was getting up there. Slave and master cylinders replaced at 97k.
Keith, hope you get it sorted before your visit to CofG
 
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