knocked it loose changing plugs. started leaking soon thereafter. wiggled it out yesterdayand the one o-ring on the bottom looked ok, but i cant figure out how to make it go back in tight. there is no bolt there that i can see or feel. i will get a new dipstick tube, but will it fit tighter? whats up with this? 99 f-150 with 4.2l v6 i think its a 4r100 tranny.