Clutch issues

[Jt2El46]

My 1999 has been having clutch issues. When It's cold it's works fine but the longer I drive the harder it is to select gears. Especially 1st gear. I replaced the master and slave cylinders but the problem is back. Anyone had a similar problem?

 

[turbo8]

When was the last time you changed the transmission fluid? Red line mt-90

 

[reelamin]

My 1999 has been having clutch issues. When It's cold it's works fine but the longer I drive the harder it is to select gears. Especially 1st gear. I replaced the master and slave cylinders but the problem is back. Anyone had a similar problem?

More info needed on what it's doing....you can change gears without your clutch. So, is it the clutch or the transmission? You just need to adjust your engine RPM while applying slight pressure to shift lever when not using your clutch. When it matches it will go into gear.

 

[Jt2El46]

When cold the peddle works normally and the adjusted hight is fine. As it warms up the peddle seems to go to the floor and it become difficult to go into to gear. Most notably 1st. If I go into second or other gears first it will pop into 1st, and as I release the pedal it feels very low engagement. Over all the pedal hight seems to vary when the clutch will grab, like a warm master clutch cylinder.

I drained the trans mission and checked the fluid, it was unremarkable with not debris. the transmission shifts fine with engine off as well as matching rpm. It acts like the clutch is not disengaging completely and change with increased heat.

The clutch does not slip, but will chatter when hot and the pedal engagement hight seem to drop.

 

[Jt2El46]

I prefer Royal Purple gear oil 75-90

 

[reelamin]

When cold the peddle works normally.

Does it shift fine in other gears after first? Is clutch fluid full...maybe change it out...might have some air in it that moves around when you use it. May have a bad clutch cylinder or it needs adjusted. Usually the adjustment is only the pedal on hydraulic clutches.

If your going into other gears first and then it will go into 1st that is the synchro's lining it up. Why I asked if other gears shift fine. If they all shift fine but one...that is a tranny problem.

 

[Jt2El46]

When cold the peddle works normally.

Does it shift fine in other gears after first? Is clutch fluid full...maybe change it out...might have some air in it that moves around when you use it. May have a bad clutch cylinder or it needs adjusted. Usually the adjustment is only the pedal on hydraulic clutches.

If your going into other gears first and then it will go into 1st that is the synchro's lining it up. Why I asked if other gears shift fine. If they all shift fine but one...that is a tranny problem.

It comes and goes. with the engine off all the gear shift fine. It is most noticeable in 1st dues to the pedal high changing. I replaced the master and slave clutch cylinder. It seemed to work fine for a day or so then has began to return. I can attempt to re-bleed the slave and see. It just seems to be heat related.

 

[St Runner]

If it is heat related I would normally say you have air in the system, but you changed out both the master and slave with the same symptoms. I feel it is the clutch disk itself, the chatter when it is warm is the main problem. What is the milage? Is it the original clutch? If it is over 150k on the original clutch I would replace it and turn/replace the flywheel. Also check that you are not leaking oil into the clutch bell housing from the valve covers. That will toast the clutch disk pretty quick