Originally Posted by
Ford Fan#1
Can I get a tuner to safely change shift points without needing a full custom tune for the motor? Or if I want to change shift points I have to mess with the engine's tuning? The reason why is when my brother has to get on it. The Rpms go to the high 4,000s - low 5,000. I don't like that at all. He lets off at around 4,500 and it doesn't stop / shift until it's at about 5,300 rpm.. And my truck has 250,300 miles on it. So that is why I don't really want to mess with the motor's tuning.