i found that the sound described - rattle when going over bumps is coming from too much play in the rear seat floor latch. I have tried several things but only reduce the noise, temporarily. going to try closed cell foam in a thin layer around latch to get some pressure against the loop and kill the slack. squeaks up front during bumps have always come from hood bumpers mounted on the radiator sheetmetal. try twisting 1/2 turn for instant fix, and then try some silicone based lube for long term. worked for me. from az, RONIN