I am looking to install the Jacobs Engine Brake on my 2006 3500 DRW w/ the 48re Auto Trans. I spoke to the dealer yesterday and thier "senior" technician told me it would ruin my transmission. Any advice would help. I pull my 30' 5er (12000 lbs) approx 20,000 miles a year out west and down into the moutians of Va.