What Causes the Transmission Temperature to Be Too High in the Envision?
2 Answers
Excessive transmission temperature in the Envision may be caused by clutch slippage, thermostat sticking, or engine and coolant overheating. Engine and Coolant Overheating: Prolonged or overloaded engine operation can raise the coolant temperature, affecting transmission cooling. Additionally, insufficient coolant in the radiator reduces the cooling system's efficiency, leading to transmission overheating. Transmission Clutch Slippage: Clutch slippage generates additional heat, increasing transmission temperature and degrading transmission oil quality, which accelerates transmission wear. Thermostat Sticking: If the transmission thermostat sticks, transmission oil cannot circulate into the cooling system, preventing heat dissipation.
I've been driving the Enclave for years, and transmission overheating is no small matter. Common causes include cooling system issues, such as a radiator clogged with dirt or leaves, or a fan that isn't running or is spinning too slowly, which prevents heat dissipation. Additionally, insufficient or aged transmission fluid can lead to overheating, as degraded oil loses its lubricating effectiveness. I've also noticed that long-distance driving or frequent overtaking puts extra strain on the transmission, causing it to overheat. Once, when I towed a small trailer, the temperature shot up—later inspection revealed the fluid level was too low. I recommend regularly cleaning the radiator grille and checking the fluid condition, replacing it with fresh oil when necessary. If the temperature warning light comes on, stop immediately to let it cool—don't push it, as this can damage internal components. Safety first. This experience has made me adopt a habit of servicing the car every six months.
