What Causes Excessive Transmission Oil Temperature?

[DelMargaret]

Here are the reasons for excessive transmission oil temperature: 1. Transmission oil level too high or too low: Check the oil quantity in the transmission oil pan and adjust the transmission oil to the specified level. 2. Damage to the transmission pump or blockage in the oil suction line: The transmission pump controls the distribution of high-pressure oil from the torque converter through the transmission distribution valve to the second shaft assembly to achieve the forward and reverse movement of the loader. Damage to the transmission pump can cause poor oil supply to the transmission. With prolonged use of the loader, increased wear can lead to internal leakage in the transmission pump, resulting in insufficient transmission pressure and mechanical efficiency. This can cause poor oil supply in the suction line, preventing the oil from lubricating moving parts, increasing friction, and leading to system overheating. Note that air leaks or blockages in the transmission pump suction line can also cause insufficient flow, leading to excessive oil temperature. 3. Deterioration of hydraulic transmission oil: If the hydraulic transmission oil in the transmission deteriorates, it loses its lubricating effect, causing excessive wear in the system and resulting in high temperatures in internal components. It is recommended that users replace the hydraulic transmission oil every 1,500 hours of loader operation.

[_travis]

I've been driving for almost 30 years and have encountered the issue of excessively high transmission oil temperature several times, mainly due to the cooling system being clogged with dust, reducing the radiator's effectiveness. Once during a long-distance trip in hot weather while carrying a heavy load, the transmission temperature warning light suddenly came on, which scared me into stopping immediately to check. Upon inspection, the radiator fins were completely covered in grime, and the transmission oil had become thick and sluggish. I recommend that car owners regularly clean the radiator, especially if they frequently drive on highways. Don't neglect the oil change intervals—using high-quality, specialized oil can extend the lifespan. If internal components like friction plates or the oil pump are worn out, overheating becomes even more troublesome. My neighbor didn't take it seriously, and his transmission ended up burning out, costing him tens of thousands in repairs. Pay attention to not overloading the vehicle, drive smoothly, and avoid flooring the gas when climbing hills—these small habits can significantly help reduce the risk of overheating. Safety comes first, so address any issues as early as possible.