When the engine temperature is cold, the car would upshift to the next gear too soon. This happens particularly when the car is just started in the morning or in the winter.
It is very easy to reproduce this issue. Start the car and immediately drive without warming up the engine. Perform a hard acceleration in drive (D). Transmission is set to shift automatically.
1st gear would shift at 3500-4000 RPM.
2nd gear would shift at 4500-5000 RPM.
This is very annoying when trying to do a hard acceleration on cold engine because the transmission does not shift at near redline 6000-6500 RPM (maximum acceleration on the optimization between torque and horsepower curve). Maybe this is done to protect the engine to prevent premature piston wear.
The solution is to warm up the engine to optimal engine operating temperature.
When the engine temperature is cold, the car would upshift to the next gear too soon. This happens particularly when the car is just started in the morning or in the winter.
It is very easy to reproduce this issue. Start the car and immediately drive without warming up the engine. Perform a hard acceleration in drive (D). Transmission is set to shift automatically.
1st gear would shift at 3500-4000 RPM.
2nd gear would shift at 4500-5000 RPM.
This is very annoying when trying to do a hard acceleration on cold engine because the transmission does not shift at near redline 6000-6500 RPM (maximum acceleration on the optimization between torque and horsepower curve). Maybe this is done to protect the engine to prevent premature piston wear.
The solution is to warm up the engine to optimal engine operating temperature.
- kevh, Atlanta, GA, US