First problem is hard shifting. This happens more when the engine is cold not towing or hauling.
Second problem is when towing a heavy load (12K at the bumper) the tanny shutters bad when shifting from First to Second, then going from Second to Third it still shutters but not as bad.
I have only noticed the shuttering when under a heavy load but the hard shifting happens everyday.
I run an Edge W/attitude but have since removed it to see is this would help. No difference at all.
Tia, Marco.

If you've been running with the Edge for a while the transmission is probably dialed in to that extra torque. I'd see if your dealer can reset the TAPS back to base or run the Fastlearn procedure again. That may solve the problem.

Is this something that just happens when running a tuner? This problem started when the tuner was already installed. Had the Edge on for nearly Two years with no problems. So, after the problem appeared I took the Edge off to see if that would help.
I also forgot to mention that my truck has the One piece driveline already.