I recently installed a transmission drain plug on my 08 F150 - the Dorman type with the little o-ring around the drain plug itself. While the plug body itself is leak-free, the little drain plug has developed a drip. I've put teflon tape on the threads, and monkeyed with the torque, but a drip always develops. Problem seems to be the o-ring - it deforms under the slightest torque. Has anyone else had this problem? How did you solve it? If I can't solve this, I guess I'll be ordering the U-haul pan.