I don't drive my truck much anymore it sits in the garage most of the time. the last couple of times I drove it the power steering is very tight, like every 1/4 turn it gets tight almost like its binding, doesn't want to come back on its own after a turn either, any sugestions, and yes the fluid is full and no whine

 

My truck did the same thing when I hit a pot hole. I changed the fluid did not help. So I just keep driving it and one day it when away. It was about 2 weeks then it was fine. I checked everything I thing its in the gear box. Its been 6 months and it been fine?

 

my truck did this from the time i bought it..and dealer said it was normal..(not my dealer anymore).. then one day it stopped working completly..to the left...they changed the pump and rack and pinion..
wish you luck

 

If it doesn't wanna go back to center it may be ball joints

 

After a lot of searching I found out to hose the crap out of the steering shaft ujoints with wd40 and wala all better, they were lookin pretty crusty