I use the same set-up and (with chains) generally works great when the snow is fresh and light. It starts to become a problem though under 2 conditions:
1. The sides of the drive get piled so high that the rear plow can't send the snow over (or into) them. Then I have to use the FEL to move the banks a bit - a huge time drainer.
2. The weather warms up and the snow gets really heavy. I have now bent three 3-point sway arms and broke 2 shackle assemblies (sorry if I don't have my terms correct) from pushing the heavy snow. I think I keep everything tight all the time, and keep the speed low, and try to really slow down when pushing a pile directly into an established pile/bank, but those sway arms (thick as they are) seem to be a weak link in the chain, as it were.
I'm thinking of adding a 1-1/2 x 3/16 thick flat bar tack welded along the "top" of the arms - giving it an L-bar geometry. I don't want to make these too strong or whatever forces have been bending the arms may, next time, bend the main frame itself.
Anyone have any thoughts?
(uh oh, here come the sway bar police)