Pontiac Montana hard shifting issue at normal operating temperature on Pontiac Montana

Some Pontiac Montana owners report experiencing hard shifting issues when the vehicle reaches normal operating temperature, which may be attributed to several factors. These include a worn valve body or a faulty pressure control solenoid that can cause hard shifts after extended driving. Additionally, low or dirty transmission fluid is often cited as a contributing factor, highlighting the importance of checking the fluid level and condition while the engine is running in Park. Overheating is another common concern, leading to shifting delays and reluctance to engage certain gears, often due to high operating temperatures or a failing cooling system. Regular maintenance, such as changing the transmission fluid and filter, is recommended to mitigate these issues and ensure smooth operation. If problems persist, owners are advised to seek a professional inspection, as a faulty shift solenoid may require specific repairs. Lastly, some mechanics suggest monitoring driving behavior, emphasizing the importance of professional advice based on individual circumstances.