Brought my truck in today & they changed RPM to 601 for my 315s feels off now tranny wont lock until speedo reads 60 went past portable radar by school speedo reads 8 mph higher than radar am I missing something.

 

Guess Ill borrow GPS today and check it with that to.

 

was way off according to gps called dealer went back a different tech measured tire reprogramed rpms to 585 much closer about 2mph off now first tech entered wrong screen when asked about axle