I recently turned a viper away due to time constraints that needed some work done. Some local shop did the work and some how managed to spin the damper on the crank. The guys working on the car apparently thought it was no big deal based off what the customer told me later on. Just shaking my head. I don't think it's common for the damper to spin on the crank but was there a year for this happening more so than others? I though it was on the 2000 models. Might be wrong.