here how i fixed my running boards now I have no problems!
http://explorerforum.com/forums/showthread.php?t=291978
Front two nuts and one bolt
Rear two nuts and one bolt
unplug wiring
off truck
lay something soft down so no scratches
plastic sheild screws
motor cover screws
pull off motor cover
spin shaft untill it stops, wedge bolt will be accessible
remove wedge bolt
pop out wedge from back side
wedge
this is motor shaft, note black square will make mark on wedge
note mark on wedge for reintallation
spray lubricant on all moving parts
step on board and work up and down spraying lubricant in all joints untill moving freely
spray lubricant in transmission
spray electricial cleaner inside motor cover
spray electricial cleaner on shaft
inspect that the brushes are still good
apply small amount of grease to back bearing in motor cover, use something plastic to apply grease.
work bearing so it moves freely
insert motor cover, you might have to wiggle it back and forth
motor cover screwed in place
insert wegde in place
flip board over and insert wedge screw and tighten down
install plastic sheild screws
bring board back over to truck and plug in electric wiring and test board. reinstall all four nuts and two bolts securing board back to truck
deployed
board retracted, your all done saving 1600.00 bucks