I have been hearing a rattle coming from the front of my 2001 F150 supercrew when I hit bumps in the road. I found the problem to be the transmission oil cooler. The oil cooler is attached on the bottom by a small metal bracket and a 10mm bolt to the radiator support. There is a metal bracket kind of surrounding the oil cooler. There are 4 holes on top of this metal bracket that maybe had fasteners to attach the top of the oil cooler to it. Mine does not have any fasteners. Just 4 open holes. This causes the top of the oil cooler to hit the bracket, causing the noise. Does anybody know what fasteners belong in the 4 holes? I don't want to risk damaging the cooler.