GOES INTO LIMP MODE. Transmission shifts hard, slips, locks up. I've been having this issue for 2 years. Transmission seems to shift twice in 3rd and 5th gears, there's a jult then goes to limp mode, no excelleration. After a minute or so, it's stuck in 3rd or 5th gear. Wrench light appears. I have been pulling over, ( when it is safe ) plugging in my scanner, then erasing codes. P0755, P0740, P0741. This has been a temporary fix. I've had the valve body replaced 3 times, with the lead frame. And recalibrate to the ECM. Still having the same issues.