Hello
Are there any companies which make tuners for Auto transmission? Looking for way to change shift points and shift times.
if I get a Ktuner and up engine red line to say 7300rpm, the TCM is still going shift at it's set shift points ? Or will it change and hold to 7300rpm?

 

There's no transmission tuning and yes it should hold to whatever red line you've set in sport mode. Except for first gear which will only rev high if you give it lots of gas from a stop.