Forum Discussion

CrowsnestGuy's avatar
CrowsnestGuy
Explorer
Aug 22, 2017

5th Wheel Hitch Placement

Ok first the technical stuff...
Truck is a 2007 Silverado 2500HD 2WD Crew Cab long box, new body style,with air bags.

Hitch is a old DSP 12000# with the rails running front to back. The rails have 4 mounting holes (only 3 need to be used for installation) so where it is mounted is where it stays, no adjustments after install.

The trailer we have not purchased yet but we are looking for something between 20-24 feet long and hopefully the GVW will be under 8500# with pin weight around 1500-1800# We are also planning on pulling a 1500# boat behind the 5th wheel.

Now the question is, due to obstructions under the bed and on the frame , I can only mount the hitch in 2 location, one being 1-1/2 behind the centre of the rear axle, or 5 inches in front of the rear axle. Can I get away with it being behind the axle or should I mount it 5 inches forward?

Thanks for the help as new to 5th wheels....
  • JIMNLIN wrote:
    On long bed trucks I like 3" forward of the trucks rear axle for my tandem and triaxle GN and 5th wheel trailers.


    Yes there are 3 brackets per side that mount to the frame per side. This is why my mounting positions are limited. If I go the 2 inches ahead of axle the bolts acually go thru the box cross members and will not allow me to use the brackets in that location.
  • On long bed trucks I like 3" forward of the trucks rear axle for my tandem and triaxle GN and 5th wheel trailers.
  • You never want the hitch pin behind the axle. Ideally the pin should be just in front of the axle. 5 inches might be too much. BTW do the rails mount to the frame some how? I hope so.