Wayne
Active member
I've got a customer with an F550 that keeps breaking flexplates. '08 F550 bucket truck we recently ******d with a stock power tune. It's killed 3 flex plates within the last 3 months / 500 miles, and I can't figure out why. The engine runs great and the trans shifts good. This last round, we replaced the torque converter with a new factory one, just for good measure, but it lasted the shortest round of all at less than 50 miles. Crankshaft thrust was right within spec as well. Any recommendations on what to check?