JIMNLIN wrote:
The SRW with 3.42 gears will do fine.
The 3500 DRW with the same 3.42 gears is rated at around 20k lbs tow rating.
We have a couple of members who pulled 18k-20k 5th wheel trailers with the 3.42 DRW. They report no issues.
The 3500 SRW has a 7000 rawr and may weigh 3400-3500 lbs on the rear axle leaving the truck with around 3500-3600 lb load in the bed. The truck is going to be close to max loaded depending on how much you load in front of the trailers axles and the rear half of the truck. Load both on the light side and the truck will carry the load fine.
My buddy has an XLR thunderbolt with around a 3,000 pound hitch weight. He bought a 2013 super duty SRW powerstroke. I told him to get a dually but he didn't. He towed it all over Montana, Wyoming, and South Dakota last summer for 3 weeks. He had no problems in heat, wind, rain etc.
Yes a dually will be more stable, but as long as you are within weight, you'll be fine with a SRW.