New Andersen WD hitch

BenK wrote:
Don't believe that the GMT800 receiver pin box moves more than most other traditional designed receivers...here are some links and pics

GM Hitch Deflection Measured - Comments Welcome
John's comment on his GMT800 receiver:

"The amount of deflection of the GM hitch was amazing"

Ben, I think you should have included the entire paragraph from which this excerpt was taken:

JBarca wrote:
The amount of deflection of the GM hitch was amazing. This was measured down the centerline of the truck as the hitch would deflect when I hooked up my TT. I did not measure side to side turning deflection.

The also amazing part is the Putnam also deflected in this manner as well.

The failures I have seen seem to be more side load related than up and down. This may be the week link of the GM.

(Red and bold added for emphasis)

Also, I think you should include this:

JBarca wrote:
Here is the same scale dim after dropping a 1,100# tongue weight on the hitch. 1,100# tongue in weight carrying mode, no spring bars, now at 7/16". The GM hitch is suppose to take this weight in weight carrying mode.

After I connected both 800# spring bars the gap changed to 0.219".

Basically the hitch now went back up to allmost the zero state of 3/16".

(Red and bold added for emphasis)
IOW, the GM hitch deflected under "weight carrying" and then went back almost to the unloaded state after WD was applied.

And then there's the "Chart with GM and Putnam measured dim.'s"
If you look at the numbers on the chart, I think they show:
For 1000# tongue weight, the changes in distance A+B is --
GM Receiver: "weight carrying" A+B = -0.358", WD A+B = +0.014"
Punnam Rcvr: "weight carrying" A+B = -0.407", WD A+B = -0.025"
IMO, there is no significant difference in GM versus Putnam deflections.

John then concludes:

JBarca wrote:
So after seeing all this and seeing the failures on this forum, they appear to be side loaded or twisting the hitch off going around a turn as opposed to an up and down break.

It would be nice to know what their tongue weight was and what WD hitch they had and how it broke the GM hitch. My new Putman is very reinforced in the left to right direction

even though it does deflect up and down some like the GM hitch.

(Red and bold added for emphasis.)

This post by John Barca is very informative. Thanks for providing the link.

Ron