Greetings....

I Hayder from Iraq
I have a Ford Windstar 2002....
Sometimes (but not always) when driving down the street and when approached the car stopped in traffic and then drive and the press on the accelerator having a problem of delay in the Transmission from the first speed to the second speed.
Note:
There is an error in the speedometer reading (reading is not accurate)
Please help me and what are the suggested solutions.

Best Regards