You put your Hummer through a lot of extreme conditions, and now your Hummer clutch is beginning to wear out. After all, most clutches are designed to last well past 80,000 miles, but rough road conditions (sound familiar?) and driving habits can shorten the lifespan of your Hummer clutch. Your clutch, after all, undergoes tremendous pressure and heat stress every day, and eventually the three main parts of the Hummer clutch - the flywheel, disc and pressure plate -- will begin to wear down the friction surfaces of these parts until the surface is too thin to transmit enough torque to move the car normally. What are the signs that the end of your Hummer clutch is approaching? When your Hummer clutch begins to fail, the most common complaints center around the noise and tumult that a worn-out clutch creates when shifting gears. You might struggle to release the clutch, or notice slipping, 'chattering,' or hideous screeching. Sometimes the car will flat out refuse to move at all when the Hummer clutch is dying. The clutch chatter can be caused by a flywheel that needs to be resurfaced, or problems with the Hummer clutch's facings, such as fatigue or an oil leak. When the clutch's pedal is hard, there might be a worn-out fork or the release-bearing retainer is faulty. If you face the issue of a clutch that slips, the flywheel might need resurfacing, or the clutch is suffering from improper linkage adjustment, too-tight release bearing lash or worn facings. When you diagnose your Hummer clutch's problem, then order a replacement clutch here and install it yourself.