larry barnhart wrote:
We towed our 35 ft alpenlite that weighs 14380 loaded for a winter's visit of 6 months with a 2001 3500 2wd chev dually and the 8.1 gas engine. It was very good and no problems. Not as fast up the mountains but fast to make us happy. It had the 4:10 rear end so my thinking is a Ford with the 6.2 and low rear gear would work very nice for 12000 lbs. I did talk to a new owner of this engine during the first months it came out and he was pulling a Teton fifthwheel and was slower than his previous ford but he was really liking the engine.
chevman
Not sure about the current model year, but in '11-'13 model years when I was following Ford truck specs, the 6.2/4.30's GCW/tow rating was within 1500 lbs of the 6.7/3.55, in F250/350SRW pickups.
That's saying alot for the towing performance of the engine, considering the 6.7 has a good 300 more lb-ft of torque than the 6.2. That 4.30 gear makes a big difference in keeping the 6.2 in it's power band, in addition to multiplying torque by a much greater factor than 3.55. The low 1st-3rd gears of the tranny help alot too.
I would have no problem myself with buying an F350SRW 6.2/4.30 truck to tow 12K lbs.
