Originally Posted by Simple guy
I am trying to think of what you could be referring to. Is/was it on the firewall?
It is not on the firewall, it is parallel to the ground. It is above all the shafts and has cut outs to fit perfectly. It was not a problem, or even noticed during a pre-buy inspection (leak check). In other words, it is attached directly to the floor of the cab and is probably about 3' x 4'. I don't think it's after market. I imagine it's some kind of insulation to handle road noise, but it is not water friendly. The truck has 170,000 miles on it and I'm I can't imagine it's the first time it's been exposed to mud and water, but it's coming down. I'll try to post a picture in the morning. Thanks.
Edit: Pictures are up. Not the best. I'll take some in the AM with a better perspective.