Clutch Issues

[Heo]

The hydraulic  T/o bearing don't slide it fixed and "telescope" in it self.
And how often have you got parts that was made to work together that
actually worked together Or is it just me that live on the otherside of
the globe that get sent defect parts that someone living closer have returned
One thought is the T/O bearing right angeled against the pressure plate
if not you got a side loading that can make the T/O stick?

[turbohunter]

I get that it's fixed Heo but does not the clutch side of it extend on the slider?

[scott foxwell]

I know that when I was building Cobras we used McLeod TO brgs like this one:



They would ship with a rebuild kit. We were told that if they sat on the shelf for too long they would dry out. With this style, the bearing part still slides on the support sleeve even though the base is fixed.

[scott foxwell]

I get that it's fixed Heo but does not the clutch side of it extend on the slider?

Yes, it does.

[jayb]

Hmm, the instructions I got with the hydraulic clutch kit didn't say anything about lubricating the tube that the bearing rides on.  I didn't realize that the movable part of the throwout bearing slid on the tube; I thought it was contained with some kind of sleeve in the throwout bearing itself.  Maybe I'll see if I can paint some oil or grease on that tube through the window on the bellhousing, and work it back and forth a few times to see if that helps...

[My427stang]

Jay, I think that would be wise to lubricate if you can.  I cannot imagine they would give up indexing the bearing off the collar, otherwise the seal would have to be pretty stout to take the load when it meshes with the clutch, but it is speculation, it really depends on design.

Does that setup have you spot face whatever it pushes off of? Not sure if I am being clear, but if the back side was not pushing off a parallel surface it could introduce a side load, which could cause binding, then minimized with some slop fro  heat.  All theory, could be a sticky, I like that idea best, but bench racing here

[cjshaker]

The problem with using grease and oils inside a bellhousing is that it becomes a magnet for clutch dust and friction material, which usually isn't good and will lead to more sticking, binding or wear. But I have no experience with hydraulic clutches either.

[jayb]

Ross, the throwout bearing slides up against a flat face on the front of the transmission.  If I recall correctly there are shims that go between the throwout bearing and the front of the trans to get it properly spaced to the clutch fingers.  There is a set screw that goes into the sleeve to keep the throwout bearing from rotating.

I got the car up on the hoist and looked in the side of the bell, and with the diaphragm style clutch there is no way for me to get in there and grease the sleeve.  I put a couple squirts of WD-40 between the fingers, but didn't want to use too much for fear of oiling the discs or attracting dirt as Doug mentioned above.  Afterwards I went in and pressed the pedal about 20 times but it didn't seem to help any...

[turbohunter]

I agree in theory with Dougs statement but I haven't found any real world crud driven binding after many years of stop and go commuting every day.

[scott foxwell]

I would not lube the bearing support. It'll just attract more crud and probably end up causing more wear and tear than if you left it dry. It needs to be smooth and dry and shouldn't have any issues.

[My427stang]

Hundreds of thousands of vehicles in all kinds of environments have had grease fittings that not only lubed the TB but also the surface it rides on. 

However, it is of course your call

[turbohunter]

Fun, ain't it???

[babybolt]

Found out something the very hard way.  The production versions of these annular throw out bearings have seals incompatible with synthetic fluids.   Some older transmissions, up to around the mid-90's were not rated for synthetic trans fluid and can bail out the fluid through gasket or seal leaks.  This then contaminants the throw out bearing seal causing it to fail.  Not sure if this applies to the aftermarket throw out bearings of this type.

[Leny Mason]

Hi, I have replaced a lot of hydraulic clutch systems  and they work great, if someone can work the clutch so you can put a long feeler gauge between the through out bearing and the fingers to see if it is the clutch sticking or the slave/ through out bearing, I do not believe the through out bearing moves much on the sleeve other than for alignment purposes, somehow you need to find out if the through out bearing is retracting smoothly and the way is with a feeler gauge. Leny Mason

[shady]

My money is on a disc or pp. problem. That is where most of the heat is concentrated.