Parked on a steep hill now truck won't move when wheel turned

[lethal1]

99 LX470 with 296k on it and had no problems leading up to this besides a buzz in the passenger speaker which magically fixed itself in 2 weeks. I parked the LX on a steep hill at a restaurant and on the way home I noticed it felt like a caliper was hung up. Got it home and it runs and drives fine in a straight line but after a while the sluggishness also happens in a straight-line. Also, when you turn the wheel it's like it has no power and it makes a clicking sound. I am getting tons of clicking (relays) from behind the dash on startup and no warning lights are on. Does anybody have any idea what this could be? It's about to get towed to the dealer and i'm trying to prepare myself for the possible causes. ATF and both differentials were both checked and filled at 285k and those levels are the same today. I really appreciate any help I can get with this one. Also, truck is bone stock no lift, tires, mods, etc...

 

[bjarnep]

Have you checked if you accidently engaged the center differential lock?

 

[lethal1]

I could've sworn I checked that. Either way, that's what it was. I am such an idiot!! Thank you!

 

[RyanStl]

Same happened to me when I test drove my Hundy except I didn't know what the button did. All I knew the traction control off light came on and then would not come off. I told the lady I bought the truck from that I thought there was something wrong with her traction control, which could be a problem for me. Later she called and said when she put it in reverse and back out of her driveway the light came off. It was just a CDL lock that was almost never used sticking.