[pantdino]

Originally Posted by Ultramaroon

Did you try what I suggested?

Also, you can check for yourself whether or not it's the throwout bearing by reaching in and pulling the clutch fork forward. Just pop the hood before you start it, locate the clutch fork, start the car, listen for the noise.

Pull the clutch fork forward which ensures the throwout bearing is pulled back away from the pressure plate. Does the noise go away?


I'm open to it maybe being the throwout bearing but you would hear and feel other things depressing the clutch pedal.

It's the gearbox.

It is very unlikely to be the TO bearing, which is only under load when the clutch is pushed in.

My TR6 tranny was way noisy and got quieter when I pushed the clutch in. It was the input shaft bearings.

Re the gearbox viscosity issue-- the viscosity decreases as it warms up, so using a higher viscosity oil would likely make the noise worse, not better. When the clutch is engaged all the gears are spinning in the gearbox but just not engaged. So it will make some noise