How to Measure for Driveshafts that have a Center Support Bearing (carrier bearing) near the middle of the driveshaft. All 2 piece driveshaft are Hi-Speed Balanced as one rotating assembly.
Use this for late 50’s and Early 60’s GM Cars. It is also used with mid to late 60’s and early 70’s GM Trucks with the “Truck Arm” suspension where the center support bearing fits in a frame tunnel. Note: On the short bed trucks we can go to a 1 pc shaft but not the long bed.