i had this problem on my jeep when i first bought it. a buncha pb blaster and swinging the door back and forth countless times did the trick. now they go on and come off with ease.
Dana 44 Front 60 Rear
TeraFlex - LCG Max Kit, SYE, 2-Low Kit, High Steer Kit w HD Tie Rod, Dual Rate S/T Sway Bar
FAB Tech Front Bumper
Poison Spider - Fenders, Roll Cage
37x12.50x17 Pro Comp Mud on 17" Pro Comp Steels
Too much more to list....