I have a 2006 QC 3500 DRW. i am buying a 24' enclosed trailer for my race car. total weight of the trailer and contents will be 8-9k. I have always used wd hitches with trailer over 5k. I have never had a drw before though. the rear springs are so stiff in this truck that I am not sure I will be able to transfer much weight with the bars or that I even need to. I tried to look up the hitch rating but cant find it. is it a class 3 or 4 hitch which comes stock on this truck? its a 2" receiver. any thoughts?

 

I assume it is a class 4 hitch, being its a 1 ton, but the hitch looks to be the same as on the 1/2 and 3/4 tons, so your guess is as good as mine. I have never used a WD hitch. My box trailer that i haul for work weighs around 8-9k and is 18' long. Pulled this trailer for almost 5 years now. No problems so far, the hole that the pin goes thru is get oblong now. Looking into getting a new one. Also pull a bumper pull 20' over the axle flat bed with my Case CX-36b on the trailer, not sure of trailer weight, mini is around 9k. I don't think you will have a problem at all.

 

I've never used a W/D either. Properly loaded with the correct tongue weight it shouldn't be a problem.

I would load it up and go for a spin and see how it does if you don't like it then go get one.

 

Technicalities are what we are talking about now. Your truck likely comes from the factory with a class IV receiver. In order to technically be able to handle larger weights, tongue and pull, than 1000 lbs and 7500 lbs, respectively, you should upgrade your receiver to a class V. There are various ratings in this realm. The typical is 1200 and 12,000, with WD, but the Putnam XDR receiver on my 99 is rated for 1600 and 16,000, with WD, and 15,000 w/o WD.
Hooking up at the limits is not going to make the receiver fall off your truck, but over time it may cause more fatigue in the metal and the receiver will may to crack. Of course this also depends on what happens when towing, rough roads, etc.
Anyway, what I'm getting at is the technicality. If you calculate your tongue weight wrong and have a failure, or some other mishap where you are possibly at fault or sued, the opposing side will be looking hard at these technicalities. This includes your own insurance company, who would love to find a technicality that allows them to preclude you from coverage for a given mishap. Over GCVW is one of those technicalities, and tongue weight may be another. This is what you must keep in mind as you design your tow rigging.
The rear springs on that 3500 probably won't even notice the tongue weight, whatever you do.

Chris