I have a F350 SB, SwayPro with 1,500lbs bars and a 3,000lb tongue jack on the trailer. The tongue jack either stalls or reaches the end of the extension before all the tension is out of the bars.
Putting the chains on and taking the chains off is always something I think "Maybe this time I'll get it."
The non ratcheting handle that SwayPro provides is dangerous. To add a measure of safety I use a 1/2" ratchet with a 24" handle. When releasing the chains once the pivot goes over center I don't have to worry about holding the handle or my arm being pulled out of the socket.
There are some sites that I've backed down into that I've found it better to pull out off to release the chains safely.
I've found that I can cheat by putting the 6 chain link on one side first and then the 8th on the other side. Then go back to the first side and change the 6th link to the 8th link.
The system would be much better if there was left and right chain pivot. If the truck is turned I find that there is not enough room on one side so the ratchet hits the bumper.
