Help with Shifting Hard problems

[racemalone]

We have a 1999 F350 and had the transmission rebuilt in 2007. Occasionally it will shift hard from 2nd to 3rd gear when driving. Sometimes when you are pulling you can smell a burnt transmission fluid smell. I do have a Banks 6 gun chip on the truck. I also have recently changed the fluid and the filter and it looked fine...no shavings and the fluid smelt fine. Any suggestions on what I can do or should do??? Thanks for the help in advance.

[cedillo]

I Have a 1999 f250 sd, i Just get the tranny rebuild 2 months ago, long story short, same problems as yours but the mechanic said is an electrical problem, where ?, he wants $500 to tell me

[FordNutz]

It sounds like the computer is reacting to what it thinks is a slip condition so it is raising line pressure. That could explain the harsh shifts and burnt fluid.