Frame Stiffing to reduce Porpoising?
Got a question for you seasoned drivers with older rigs. I have a 1999 F350 Dually Quad Cab Long Bed. I've been driving it for thousands of miles and for the most part, it's been fine. However, while ...
Forum Discussion
adamis wrote:
Thanks HMS Beagle. I did some research on the frame differences and what I found was Ford did increase the thickness. From this discussion here:
https://www.powerstroke.org/threads/frame-differences.136669/
The frame differences are:
99-04 Crew Cab F-250-350 Pickup 156.2" WB, (6.87 x 2.36 x .240), 6.0
05-10 Crew Cab F-250-350 Pickup 156.2" WB, (6.87 x 2.36 x .264), 6.7
That would explain the payload capacity increase.
2005 brought a number changes to the Ford F-series. Not only was the frame thickened, the front suspension was switched to coil, the leafs and stabilizer bars were thicker and the rims were taller to clear larger brakes. I am not sure when 4r100 transmission was introduced, but the 5r110 came in with 6.0 PSD.
