Who says that torque converters are non-rebuildable? Well, the OEMs have been saying it since the first sealed torque converter rolled off the assembly line, and they continue to say it today. “But,” you say, “I think the torque converter aftermarket gets good support from the OEs, don’t they?”
Maintaining the proper centerline during the torque-converter rebuild process is very important. How well the centerline was maintained during the process can be measured by how much balance weight needs to be added at the end of the process.