When I bought my Lacrosse I towed it with a 2010 F150 5.4 with a 3.73 axle that didn't have the max tow package. It rev'd high through the hills and I only got 7.5 mpg. The trailer would sway during high winds and through uneven parts of the highway. I could've bought a more expensive WDH other than the equalizer, but I probably would have spent more as I felt I was putting a strain on the transmission.
In addition I was over payload capacity and didn't feel comfortable putting my family in that tow situation. My TV is now a 2014 F250. I don't feel the trailer back there, have more power going through hills and up mountains, and my mpg is 9.5.
2014 Ford F250 FX4 Crewcab Powerstroke 6.7
2014 Primetime Lacrosse 318BHS Touring Edition