2020 GMC
Well maybe the truck builders are finally listening to the RV crowd for a change: Just got a brochure on the 2020 GMC HD trucks. 1. They have finally made the bed rails lower 2. They have a ...
Forum Discussion
4x4ord wrote:I think a few things are screwing up your calculations.Huntindog wrote:Groover wrote:I think the video said it was 2"Cummins12V98 wrote:Grit dog wrote:.Cummins12V98 wrote:
Gooseneck hitch behind rear axle centerline. How stupid.
Yeah it must be waaaay back there to only be rated to tow 35k!
Lofl. Some people would bitsch and complain if you hit em upside the head with a bag of money...
Industry standard has been in front of axle for ever. Dumb to unload front axle.
The effect of loading/unloading the front axle varies with how far you are from the axle. We are talking 3 or 4 inches here vs maybe 50 or more with a bumper pull and most new trucks are rated to carry some astonishing weights on the bumper. You probably won't notice the small change here. However, with the trend towards short bed pickups smacking the back of the cab has become a real issue. A few inches backwards will make a huge difference on that. I hope that doesn't sound too much like a certain politician.
The video did say two inches behind the center of the rear axle. It also said 3000 lbs of pin weight unloaded 100 lbs off the front axle. That doesn't add up. If 3000lbs of pin weight lightened the front axle by 100 lbs the pin would have to be positioned 5.3 inches behind the rear axle on a short box crew cab and even further back on a long box crew cab.
Thae axle is NOT bolted to the frame.
It is bolted to the springs which are bolted to the hangers which are bolted to the frame. So the spring hager locations are where the frame "sees" the weight.
The video actually touches on this.
In addition:
The axle MAY not be centered on the leaf spring.
AND just to muddy the water a little more, the springs lengthen and shorten as weight is added/removed... So the axle will move for and aft a bit.
