How often should the transmission fluid be changed for the GL8?

[Beau]

The Buick GL8 is equipped with a manual-automatic transmission, and its transmission fluid is generally changed every 40,000 or 60,000 kilometers. Signs that the transmission fluid needs to be changed include body shaking, gear shifting hesitation, a transmission high-temperature warning on the dashboard, engine stalling, and unusual noises. Hazards of not changing the transmission fluid for a long time: Damage to the transmission's gear shift control mechanism; abnormal wear of gears and clutch plates inside the transmission; affecting the normal operation of the transmission, leading to damage to the transmission valve body. The methods for changing the transmission fluid are as follows: Unscrew the drain plug at the bottom of the transmission to drain the fluid before refilling. Remove the transmission oil pan directly to drain and refill the fluid: this method is more thorough than the previous one, as it removes impurities from the bottom of the oil pan. Use a circulating machine to change the automatic transmission fluid: dynamic fluid exchange with an intelligent circulating machine can filter and clean sludge and impurities inside the automatic transmission.