What Causes Transmission System Failures?

[CarmenDella]

Transmission system failures are primarily caused by: Abnormal speed in hydraulic transmission systems: For speed-related failures, it is necessary to individually adjust variable components such as throttle valves, relief valves, variable displacement pumps, and speed control valves. Then compare the adjusted speed range values with technical reference values for analysis. Abnormal operation in hydraulic transmission systems: For operation-related failures, observe the operational status of relevant system actuators to determine normalcy. Identify malfunctioning directional control valves, then inspect travel control to locate abnormal areas in the hydraulic transmission system. Abnormal pressure in hydraulic transmission systems: To determine if pressure abnormalities are causing failures, use a pressure gauge to measure pressure values at preset test points on system pipelines. Analyzing the difference between measured values and standard values can identify the source of abnormal pressure in the hydraulic transmission system.

[TaliaRose]

Transmission system failures can occur in many places. I've experienced it a few times while driving myself, mainly due to forgetting to change the transmission oil on time, resulting in dirt buildup inside that caused gear jamming and slipping, making strange noises every time I accelerated. Another time was because I frequently accelerated sharply while towing, putting too much stress on the driveshaft, causing severe wear on the universal joint, and the car started shaking violently. Later, when it was towed for repairs, it was found that the electronic control module of the automatic transmission had malfunctioned, likely due to aging circuitry. Now I've learned my lesson—I check every 10,000 kilometers, clean the fluids, and perform regular maintenance to save big money. I also tow loads moderately, prioritizing safety first, and never push it until it completely breaks down.

[JeffreyLee]

The transmission system can act up for various reasons. A severely worn clutch will slip, causing the car to not move when you press the accelerator. Transmission issues are most common—dirty or leaking fluid can prevent gears from engaging properly, leading to jerky shifts. An unstable driveshaft, such as from a damaged or unbalanced universal joint, will cause noticeable vibrations. If the differential malfunctions, the car may produce strange noises or pull to one side when turning. Electronic components, like the automatic transmission's control module, are also frequent culprits. If you notice abnormalities—such as difficulty shifting gears or unusual noises—it's best to take the car to a shop immediately. Have a technician diagnose it with proper tools to avoid worsening the damage by attempting DIY fixes.

[DelCole]

I was so frustrated when I encountered a transmission failure right after buying my car. It turned out that I messed up the wiring during modification, causing a short circuit in the automatic transmission control module, which led to delayed starts. Plus, I used to drive aggressively, and just one time of towing a heavy load caused cracks in the driveshaft. Now I've learned to check the transmission fluid with the dipstick and never skip maintenance when it's due. For newbies, I suggest reading the owner's manual more often to understand basic symptoms and deal with them promptly to avoid disrupting travel plans.