Passenger window is extremely slow in going up. I greased up the window track with some spray silicone and that seemed to help a little bit.
I read alot where people are saying the contacts in the switch get corroded. But both of my switches. passenger side and driver side make the window move slow going up. However the drive side switches for all the other windows go easily. So I feel that rules out the switches being the problem.
- So what else is left.. Change out the regulator. Saw a Youtube video seems pretty straight forward to instal the new regulator and line the window up

 

05' F150 fx4

 

Sounds like the regulator, not an expensive or difficult fix.