Help with whining sound from transmission/transfercase

[Maine951]

Today I changed both the transfer case sensors because my 4x4 wasn't shifting into low. It now works but for some reason when i drive above 20 mph I hear a whining sound. It continues to get higher until I slow down then gets lower. I cant imagine replacing the sensors could of caused this but the only thing I can think of is that when I removed the shift motor maybe when I am in normal 4x4 Auto its not centered directly in neutral in the transfer case. Along with this I have a bunch of codes coming up. Any input on what it might be? Fluids are all good and due to one of the codes i'm thinking about replacing the shift motor. I also checked and clean the ground wire.

~2002 Ford Explorer XLT AWD

-P1867 - Transfercase Contact Plate Circuit Fault
-P1891 - Transfer Case Contact Plate Ground Open
-P1824 - 4WD Electric Clutch Relay Circuit Fault
-B2106 - TP Input Signal Out Of Range High
-P1836 -Transfer Case Front Shaft Speed Sensor Fault
-Transfer Case Rear Shaft Speed Sensor Fault
-P1874 - Auto Hall-Effect Sensor Power Ciruit Fail

 

[mbrando1994]

Don't know too much about the powertrain system but I will say that it may be the transfer case motor. I would do some research into that, I want to say driving it like this may cause damage.