Leeblev wrote:
Couple of things you said that are red flags:
l. Lots of sway
2. towing that light trailer gets 7-9 MPG
Meh.
My 2500 with 8.1L big block gets 7-8 mpg towing our 8500 lb trailer. Not that much difference.
I would also add that if you are thinking that sway is going to disappear with a 2500 model you may be setting yourself up for disappointment. Yes, the 2500 model will have stiffer suspension and stiffer LT tires, but not enough to stop sway if you are having issues now. You need to look at the % of total trailer weight on the tongue, and/or upgrading to a better WD hitch to control sway.
That said, you are asking a lot from your 150. BUT, upgrading to a 250 is not the be-all end-all either, since the 5er you choose down the road may require a 350 or dually to handle the weight.
Before you jump into anything, get the truck and trailer weighed separately and together. See what's what on the weights and whether you are within the limits on the 150 and also what we can find out about sway issues.
