When easing off the clutch pedal an annoying clunk sound comes from either the clutch assembly or the drive train(I'm guessing the differential). This only happens at low RPMs, specially in the low gears. My fear is to break my differential or other drive train components in the event of a hard acceleration.

Another issue I have noticed is a howling/grinding sound coming from the transmission at hard acceleration or when going up hill. It feels like the transmission is slipping but decelerating and reapplying pressure on the clutch pedal seems to get rid of the noise, nonetheless, it seems that a component either on the clutch or the transmission slips when certain amount of pressure is applied.

Last but not least, very annoying indeed, after pushing the engine to the limit, the clutch pedal begin to stick to the bottom and thus making shifting impossible until the RPMs are low enough to allow the clutch pedal to regain pressure. My guess is that some hydraulic issue is going on and oil pressure decreases during hard acceleration scenarios. I bought this card brand new and I'm the only owner. The radiator has broken twice as well.