1997 Honda Civic 4 cyl Front Wheel Drive Manual 119Km miles
There is an intermittent noise coming from the transmission. The noise is a clunka. Clunka. Clunka type which is in synchronism with the engine RPM ONLY WHEN the clutch is out. The noise occurs in neutral, 1, 2, 3, 4, 5 and reverse. It seems to get quieter in the higher gears. The interesting part is that the noise can stop altogether - and transmission noises sound normal - until the engine RPM reaches about 3000, then the noise restarts.
I have checked the transmission oil level - OK.
Looking into the the bell housing where the release fork is I've noticed what looks like a scoring mark on the pressure plate. With the clutch engaged (pedal pushed in) the noise stops. The pressure plate is still rotating of course but I'm wondering if the plate is loose somehow and pressure on it from the release bearing is pushing it up against the flywheel moving it away from whatever is touching and scoring it.
I hope it is a loose pressure plate and not something internal in the gearbox.
Tuesday, October 6th, 2009 AT 4:55 AM