New to F150 Forum. I've read some great info about IEWs and transfer case motors relating to 4x4 problems. I believe that I have a transfer case issue. I've confirmed vacuum at the solenoid and the IEWs, and replaced the transfer case motor. However, I can spin the front wheels by hand with the wheels raised off the ground with the 4x4 Hi and Lo engaged. Interestingly enough, 4x4 Hi doesn't show up on the dash but 4x4 Lo does show up on the dash panel. My question is: What test can I run to determine what specifically is wrong inside the transfer case? I forgot to mention that I'm not getting any error codes on the dash or the OBD reader. Any suggestions would greatly be appreciated. Truck just doesn't look the same without any mud on it