From time to time, and always unpredictably, the transmission acts up. When starting from a stop the car will not accelerate normally, putting me in jeopardy. Also, shifting automatically is a problem. I tried shifting through the gears and got mixed and unacceptable shifting. Depressing the accelerator only increases the RPM, the speed hardly at all.

Is this a problem in the transmission or in some electrical control of the transmission? Any advice will be welcome.

 

Take it to Lexus. Are you the original owner? Model year? mileage.