got P0753 after install of PMC, what part got fried?

Question

After install of PCM from Autozone, my Jeep instantly said that the transmission fluid was overheated. The car was cold and it instantly said overheated--it certainly wasn't overheated. It also got code P0753 and the overdrive off light came on and would not go off using the shifter button. During road test, car also stuck in third gear. Original PCM has been re-installed and transmission fluid overheat light no longer exists. However, the code is now a hard code and the Jeep doesn't shift.

Answer 1

P0753 3-4 transmission shift solenoid / transmission relay circuit

This shift solenoid is fuse protected, check the fuse, When the code is a hard code that set these are open circuit, so hopefully its the fuse or the relay. Auto zone is good in reimbursting for any damage if the solenoid 3-4  is damage if it can be proven.

 Check fuse listed as fuse 28 in the engine fuse /relay box