I have noticed in the last few days that on my drive home (70-80 degree weather) that there is rubbing noise coming from the battery area behind the seats. It sounds like pieces of styrofoam rubbing together. I don't notice it in the morning when it is 55-60 degrees out. Has anyone else had this?

 

Fold down one side of you rear seats then drive and see if it's louder. I think they are a **** or lever in the truck to release each seat.

Swap and put back up the first seat then fold down the other. Drive enough to see if the noise is lower or louder. This may help you figure which side it's coming from. Could be one of the seat backs is causing the noise.

I had a strange sound in the truck of my '94 Corolla. I tightened the spare tire wing nut a couple of turns and no more noise.