
The symptoms of a burnt clutch include: 1. Difficulty in pressing the clutch pedal; 2. Difficulty in shifting gears even when the clutch is pressed; 3. Slow car acceleration despite pressing the accelerator; 4. A burning smell and rapid increase in engine RPM. The functions of the clutch are: 1. Gradually increasing the driving force to ensure a smooth start; 2. Temporarily separating the engine and transmission for gear shifting; 3. Preventing overload in the transmission system; 4. Reducing torsional vibration impact from the engine to prolong the lifespan of transmission gears. The working principle of the clutch is: 1. When the inner race is fixed, the outer race can rotate freely in the clockwise direction without locking the wedge block; 2. When the outer race rotates counterclockwise, the wedge block locks, preventing the outer race from rotating.

When the clutch in my old car burned out, it was very noticeable—that scorched smell was particularly pungent, like burning wires. After just twenty minutes of driving, the car would be filled with this weird odor. The most frustrating part was how rough gear shifting became; it felt like the gear lever was slipping in rubber, and sometimes when pressing the clutch, I’d hear a grating friction noise. Once, while climbing a hill, the tachometer shot up to 5,000 RPM, but the car barely moved forward, like an old ox pulling a cart—clearly, the power was being wasted at the clutch. My advice: if you notice these symptoms, don’t delay. Otherwise, once the clutch disc wears out completely, you’ll end up spending a thousand bucks or more to replace the entire three-piece set.

After over a decade in auto repair, I've witnessed countless burnt clutch cases. Here are three classic symptoms I've summarized. First, pedal feel changes - a healthy clutch should depress lightly with elasticity, but a burnt one becomes heavy or makes the pedal vibrate, like stepping on a massage vibrator. Second, power delivery issues, especially during hard acceleration when engine RPM suddenly spikes without corresponding speed increase, creating complete mismatch between tachometer and speedometer readings. Third, abnormal noises - depressing the clutch produces metallic scraping sounds, as harsh as sandpaper grinding against metal. These issues typically result from drivers habitually riding the clutch or frequently flooring the accelerator.

Back when I was a novice driver, I once burned out a clutch - it was truly terrifying. The most obvious sign was the persistent smell of burning inside the car that wouldn't go away even with windows down. Shifting became extremely difficult, especially reverse gear which often refused to engage unless I forced the gear lever with all my might. There was this scary moment when I tried to downshift while turning at a roundabout - the clutch suddenly slipped, making the car jerk violently like it was having spasms. The mechanic later showed me those black metallic powder residues as undeniable proof of clutch burnout. I've learned my lesson now - no more riding the clutch in traffic jams, and I never use clutch control for speed management when descending mountain roads.


