![]() First, check the condition of the transmission fluid.However, at too colder temperatures, increasing the engine’s RPM for the sake of increasing the transmission oil flow through the pump can cause cavitation and it can also result in hard gear shifting.Īsk An Expert Mechanic for Any Make&Model Transmission oil is pumped by a transmission gear pump run that is mounted on the shaft of the torque converter and is run by the engine all the time.Īs the engine’s RPM increases, the flow of transmission oil through the pump also increases. This is because the viscosity of transmission fluid increases at lower temperatures, due to which it becomes thicker.Īnother misconception people have in mind is that transmission oil isn’t pumped when the engine is cold or in park mode. Yes, cold weather can make the car hard shift. Some Precautions To Prevent Hard Shifting of Transmission When Cold.Malfunctioning Transmission Line Pressure Sensor Malfunctioning Engine Coolant Temperature Malfunctioning Transmission Fluid Temperature Sensor Why Does Transmission Shift Hard When Cold?.This causes the car to be sluggish and oftentimes results in poor shift quality. Also, when your transmission is cold, the fluid’s viscosity is high which makes it difficult for the transmission to transmit power. The intermittent hard shifting transmission problem can be caused by a number of factors, the most common being that your vehicle has been driven through the winter months without any oil changes.Ī bad transmission oil could be causing your transmission to shift incorrectly. However, if the transmission continues to shift hard, you might have to update transmission module software or completely replace the transmission. ![]() ![]() When your transmission oil is thicker when cold, its viscosity is high which makes it difficult for the transmission to transmit power to gears. The engine takes some time to warm up and reach the operating temperature so that the transmission oil gets desired viscosity and operates the transmission system efficiently. The hard shifting of transmission when cold is normal as the transmission oil is thicker when cold. In fact, it’s so bad, many drivers stop driving and just wait for the car to warm up, which means they miss their next appointment or run the risk of getting late for an important event. Transmission shifts hard when cold, especially from gear 1 to 2, is common problem car owners face until their car is warmed up.
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