Thursday I was plowing with my 98 mitsubishi 4x4 when I hit a granite curb under the snowbank. I was going about 4mph. I hit the curb and the windshield too. There was a terrible creak at the moment of impact. I got out and lookedfor what it was. What I discovered was a bent frame. The front 18" of frame was bent down about 6". I took it to the body shop and they said $2000 to fix and your plow frame was improperly installed. I call the company that installed the plow and they say "Your dealer was supposed to call you and get you to come in for a new plow frame. In 98 there was no custom frame for that truck so we made a universal one fit. What went wrong was the universal frame hangs down and puts all the pressure on one part of the truck frame. It doesnt transfer the load back. Instead it twists downward." The installer is trying to figure out a way to get it fixed without me paying. He sais they fixed "a few" last year. My advice to others is look at your plow frame and make sure it is sending the load back along the frame. If not make some changes.