Ok so one day im driving my car and bam all of a sudden it no longer wants to go over 3000 rpm or over 25 mph. I get it home let it sit. If its cold started and drive straight out of driveway i can go however fast everything shifts smoothly and all. But after about 5 mins of warming up it no longer goes over 25 again. Now after a few days like that and no more driving i go to mess with it and the speedometer no longer works now. I have no clue as to whats causing the issue i want to ask vefore i spend a lot replacing tranny. Someone says may be input output sensor but idk what do you guys think.

 

Welcome to DF! You want to post your questions in the magnum section.

First thing you should do, is get codes read, and see what the computer thinks is going wrong.

 

Welcome to DF!