Sonnax shims 84733-10 (.010") and 84733-20 (.020") are designed for precise and accurate reduction of input clutch endplay in GM 4T60, 4T60-E and 4T65-E units. The shim installs at the OE selective location between 2nd clutch and input housing in conjunction with the OE shim and bearing. The shim installs between the drum and the OE shim. It reduces need to stock expensive OE spacers.