2000 Jeep Grand Cherokee 4.7L V8 P0732 Gear 2 Ratio Fault After Solenoid Pack Replacement

I own a 2000 Jeep Grand Cherokee with a 4.7L V8 engine and a 45RFE transmission. Recently, the vehicle triggered code P1784 — indicating a left/right pressure circuit stuck open. Given online advice, I decided to replace the transmission fluid and also swapped out the solenoid pack, as many sources suggest that the L/R pressure circuits are located within the solenoid assembly and require full replacement for repair. After completing the fluid change and installing the new solenoid pack (equipped with a white plug and deeper sensor plate), a new fault code appeared: P073-2, which indicates an incorrect gear ratio in 2nd gear. The P1784 code persists as well, though no other diagnostic codes are present. I replaced both the input and output speed sensors, which successfully cleared the P1784 code — but the P0732 issue remains. The vehicle now skips into 3rd gear when accelerating; first gear operates normally at low speeds, but as RPMs increase, it abruptly jumps from first to third without engaging second gear. I took the vehicle to a repair shop where mechanics have been unable to reproduce or explain this behavior. They noted that such a single-gear failure is unusual and typically occurs alongside multiple related codes. Online research suggests P0732 should always appear with other transmission-related faults, yet in my case, it appears isolated. Could the solenoid pack replacement have interfered with the gear ratio sensing or control system? Is there a possibility of sensor misalignment or wiring issues post-replacement? Any insights into how to diagnose and fix this specific P0732 issue on a 2000 Jeep Grand Cherokee 45RFE transmission would be greatly appreciated.