I have a question about towing. I had a gas engine before this diesel and when I pulled and was going down a hill I could downshift and the compression of th motor would hold me back so I wouldnt have to ride the brakes. I heard that in a diesel that isnt the case and that I would need to install an exhaust brake in order to slow me down on the hill. I have a 2003 quad cab with a 6 speed trans. Any help would be greatly appreciated.