#62S. It is often difficult to reduce front unit end-play on TH400 or 4L80-E units with excessive spline wear. Normal component wear allows excess forward and direct drum travel. This travel or free-play reduces sealing ring life. The TH400 and 4L80-E are limited on the thickness of pump shim material that can be added. Excessive shimming at the pump will push the forward drum off the rings and result in a burned forward clutch. We offers a .010″ thick shim, part number 62S, that can be stacked under the sun gear bearing race. Cost for 10 shims.