06 f550 build
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5th Wheeling
Joined: May 2019
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06 f550 build
Looking for advice. I have a 06 f550. Crew cab 4x4. Auto. Extended frame. I am adding a sleeper to it that will extended back 62-64 inches from the cab, depending on how I mount it. That will leave 22-24 inches till the center of the rear axle. Center of rear axle to end of frame is 49inches.
I know the best place for my 5th wheel hitch is directly over the rear axle in order to limit front end unloading. HoweverHowever to remove factory rear that and install 2 saddle tanks directly behind rear cab mounts and unddler the sleeper. So that moves the fuel weight towards the front.
So my question is mounting of my hitch. Can i move it back say 8 inches? And how mmfar behind should i be for clearence.
I know the best place for my 5th wheel hitch is directly over the rear axle in order to limit front end unloading. HoweverHowever to remove factory rear that and install 2 saddle tanks directly behind rear cab mounts and unddler the sleeper. So that moves the fuel weight towards the front.
So my question is mounting of my hitch. Can i move it back say 8 inches? And how mmfar behind should i be for clearence.
Mountain Pass
Joined: Apr 2024
Posts: 225
Likes: 85
I'm no expert, but I think a fifth wheel and/or gooseneck needs to be mounted just a little bit forward of the rear axle. This allows some weight (very little) to apply to the front axle. If mounted to the rear of the rear axle, it will unload the front axle. The situation gets worse as the truck accelerates. I don't think the tank placement will do much to help unless you hang them all off the front bumper. And always keep them full.
Moderator
Joined: May 2004
Posts: 6,530
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From: Home Base Nebraska
For a PU with 8 foot box it's directly over the axle or up to 2 inches ahead. Moving the hitch back will tend to unload the front axle but that depends on how much pin weight you have. Being it's a F650 it may not affect it that much, the
fuel tanks will help but only when they are close to full. It will also affect the way it backs up. The best thing to do is lower the trailer on the truck and see if the front raises up and how far the rear squats.
Denny
fuel tanks will help but only when they are close to full. It will also affect the way it backs up. The best thing to do is lower the trailer on the truck and see if the front raises up and how far the rear squats.
Denny
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