My gear shift 1 then make a vibration then accelerating to shift 2 then will not select while the Rpm keeps counting.
Have you checked the transmission fluid level?
Yes. It was low and the mechanic add more fluid. I was using total transmission but the mechanic added oando transmission fluid. I do not know if that is the cause right now.
It is more important that you have the correct transmission fluid. The problem is not caused becasue the fluid is two different brands. As long as they are both approved for your car,you are good.
It may be due to the band on the transmission or valve body going bad.
How many miles on the car?
Sounds like a bad transmission or just low in fluid. Is the transmission still going strong?