I'm having the same problem??!! I just disconnected my batteries so it would clear the hard shifting issues... I checked my codes and I got p0603... mine was also doing all the above and shifting super super hard in 3 and 4th gear. Please help!Can this Keep alive memory error make the tranny shift roughly and delayed ino reverse and also rough shift and get stuck in fourth gear with tow haul flashing? I'm getting a keep alive memory error code as well with those symptoms I've listed here.