I recently bought a new to me B&W Companion 5th Wheel Hitch base. The old base I had was the u-bolt style base that held the post in a fixed position (the post I am referring to is what is inserted into the turnover ball hitch that is installed underneath the truck). The updated version of the base has a redesigned post that bolts directly to the base (no u-bolts) but can be mounted in two different positions (see attached pic).
The one position (they say it is the most common position) has the base set more to the rear of the bed and the other positions moves it a few inches forward towards the cab. (Both positions are forward of the rear axle.) I haven't measured the actual distance yet but the 1st position would place the kingpin about 3-5" forward of the center of the rear axle. And the 2nd position would place the kingpin 6-8" forward of the center of the rear axle.
With the old base, the position was set. But with the new base I have an option.
The problem is that I never had the option to set the position and it worked just fine. Now that I have the opportunity to choose and am wondering what I needed to do.
So now my question is: When installing a 5th wheel hitch, how far forward of the rear axle should I endeavor to have the kingpin set at, and what distance forward of the rear axle have you all set your kingpin at?
Note: I haven't updated my profile yet but the truck I am currently working with is a 2011 Dodge Ram 3500 4x4 Crew Cab automatic transmission with a 6.7l