Have 5.0 AWD Explorer that will not lock into drive. It locks into reverse fine and will eventually lock into drive. Once locked in it runs and shifts fine. When the atf warms up it locks in easier but still not correct. I have just replaced the transfer case do to previous owner running mismatched tires. I also had the trans out had filter changed and new seals installed. Wondering if bad solenoid, a pressure or pump problem. Have hooked to scanner and no codes are flaged. Any info would be greatly appreciated

thanks