Hi Gerry,
Good pics! Really nice and learned something new as the older snap up I have seen but not in that detail and in the light of the conversion we are now having. Thanks for sharing.
TUCQUALA wrote:




So my thoughts are: How much more or less twisting force is applied to the trailer frame under normal towing events, which would include turns, driveways, twists and turns, by each of these snap ups??? Which would be better for these new, weaker trailer frames???
I think the older style would be less prone to have a failure. I know I have had one fail with the new hitch, but I still believe there was something abnormal happening during the first setup. The snaps and bangs were way out of line.
Gerry
The older snap up for sure has a chain pull closer to the frame at the top. The older style DC, the one with the U bolts, has the chain closer to the frame at the bottom. It "might" have been Reese's intent with that older standard DC to be as straight up and down as possible so the snap up hook was closer to the frame. I'm speculating this, not knowing it for fact, but it would make sense the designer made it that way.
Then came along the new HP DC and around that time the newer snap up. The HP DC no longer has a saddle clamp for the chain, it has a chain plate hanging from a canterlivered DC arm. So this snap up shifted the hook out a little more in attempts to not pull on the cam arm at an angle. Again speculation but maybe the reason
Here is the older standard DC but the new snap up. This was a 2004 TT

See the chain in the middle of the WD bar at the bottom

And then the new HP DC off to one side and out furhter.

As far as side forces, using the older snap up on the newer HP DC can put a larger angle to the chain from the hanging point as it is closer to the frame. However using the newer snap up may make the chain straighter but it then creates a canterliver on the snap up. In both cases the force on the frame is a twisting force.
On the older standard DC and the older snap up that may have been a lower twisting force on the A frame then the new HP DC
And I believe the older snap up on the newer HP DC may be slightly lower twisting than the new snap up, however maybe not a lot. The problem is end attaching point to the cam arm is still a good distance from the A frame creating a force pulling on an angle creating twist in the frame.
I like the trueness of the older snap up however I like the retainer clip of the newer one better.
Thanks again for sharing the pics, it helps add to this post of snap up failures
John