I bought a scratch and dent Whirlpool Cabrio WTW6200SW and during the spin cycle it is shaking real bad and becoming unlevel even with small loads.

Did replacing the suspension rods solve the violent shaking during spin? Did replacing the suspension rods solve the violent shaking during spin?

I had the same issue on my Cabrio WTW6400SW2. Except I also had an OL error while it ran through a wash cycle. Essentially it would fill with water and the get an OL error. I had three pieces of clothing and would still get an OL and it would drain and end cycle early. So i would then put it on drain and spin to wring water out of the four pieces and it would be fine at low rpm then it would kick up speed and it would start banging around and then UL error. My OL error was caused by gunk and corrosion on the impeller shaft and inner basket bushing being seized together and not allowing the inner basket to float as water filled the tub. so i dismantled the machine. I had the most trouble getting the impeller nd inner basket out. I spent an hour trying to pull it straight up and out by hand. I had to take the machine completely apart down to the outer bare outer tub. I then tied a ratcheting strap rated for 500 lbs around the inner basket and hung the assembly on my engine lift outside. I then plugged the outer plastic tub holes with rags and filled halfway with water. I had some help in lifting this up and the dropping it to let weight of water to yank out inner basket. 45 mins later it finally popped off shaft. The shaft was heavily corroded and had other crud on it causing it to seize. Cleaned shaft and bushing on inner basket and all was well until it came down to spin cycle, UL error. Even when washer was empty it banged around once rpm increased. I replaced the suspension with new version of suspension that comes with plastic sockets that attack to washer then the balls seat in socket without the need for grease. This fixed my UL error and now I have a functioning washer. My recommendation is to do maintenance on washer yearly and run cleaning cycle monthly to wash away any dirt or grime that eventually scales up on outside of stainless steel inner basket and on shaft. Maintenance should at least consist of removing impeller and inner basket to clean and check shaft as well as clean lint trap which is below inner basket. I had the same issue on my Cabrio WTW6400SW2. Except I also had an OL error while it ran through a wash cycle. Essentially it would fill with water and the get an OL error. I had three pieces of clothing and would still get an OL and it would drain and end cycle early. So i would then put it on drain and spin to wring water out of the four pieces and it would be fine at low rpm then it would kick up speed and it would start banging around and then UL error. My OL error was caused by gunk and corrosion on the impeller shaft and inner basket bushing being seized together and not allowing the inner basket to float as water filled the tub. so i dismantled the machine. I had the most trouble getting the impeller nd inner basket out. I spent an hour trying to pull it straight up and out by hand. I had to take the machine completely apart down to the outer bare outer tub. I then tied a ratcheting strap rated for 500 lbs around the inner basket and hung the assembly on my engine lift outside. I then plugged the outer plastic tub holes with rags and filled halfway with water. I had some help in lifting this up and the dropping it to let weight of water to yank out inner basket. 45 mins later it finally popped off shaft. The shaft was heavily corroded and had other crud on it causing it to seize. Cleaned shaft and bushing on inner basket and all was well until it came down to spin cycle, UL error. Even when washer was empty it banged around once rpm increased. I replaced the suspension with new version of suspension that comes with plastic sockets that attack to washer then the balls seat in socket without the need for grease. This fixed my UL error and now I have a functioning washer. My recommendation is to do maintenance on washer yearly and run cleaning cycle monthly to wash away any dirt or grime that eventually scales up on outside of stainless steel inner basket and on shaft. Maintenance should at least consist of removing impeller and inner basket to clean and check shaft as well as clean lint trap which is below inner basket.