THIS REALLY WORKS!
I have a 2006 Dodge Ram SLT Quad Cab.
I did the same thing snrusnak did, per his instructions in this thread.
Home Depot sells a Frost King door seal that is 5/16"x9/16" and is made of rubber, not the spongey material that is supplied by Dodge.
My factory gasket was in fairly good shape by appearance, but was failing due to the material being porous.
My 3rd light, now fits snugger and won't leak after 5 years from the assembly line.
I highly recommend repairing your 3rd light this way if you're having the same problem....
"Break Time's over, Back on your heads."
Last edited by TheAverageJoe; 09-09-2011 at 10:16 PM.