Suburban with 6.0L and 6 speed tranny?
Have a Rockwood Roo 233S. Fully dry weight about 4500 so I'll probably be pulling almost 5500 pounds loaded. Currently own 2007 Lincoln Mark LT with 5.4L, 4 speed tranny, factory towing package and 3....
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I have only towed my TT in Michigan. We have hills, but no mountains. I am pleased with performance coming from a 2003 F-150 5.4L/3.73. I cruise in 5th gear at 2200-2500rpm (60-70mph) with occasional downshift to 4th gear and 3000rpm. The only reason why I see north of 3000rpm is when I want to accelerate, and it does, pulling strong to about 5600rpm.
