I purchased Sears Tractor by Craftsman. It was in 2012, YT3000 Model 917288520. Warranty was good for 3 years. My chassis is bent. It started from the beginning, and started to get worse. I noticed after 3 years that something was not right with grass. I adjusted it so it was ok. Two years later it again had to adjust. I said something is wrong. I noticed “Lawn Tractor Deck Lift” is off. I ordered new one. Then I compared new and old, it is good. I cannot compare with chassis design, so I compared it, I measured from front to back (wheel to wheel approximately 44") ground to bottom of chassis, 11" (00"), 11 1/4" (7"), 11 1/2" (20"), 11 1/2" (30”), 11" (44”). I am positive that chassis is bent. I have few pictures to show.