Sonnax 4L60 4L60-E 4L65-E 4L70-E Transmission Shim 77409-15 Sonnax has designed a shim 77409-15 (.015" thick) to better help the needs of the rebuilder in the selection of shims when checking for front unit endplay. This .015" shim was designed to be placed between the front input OE selective and the drum pocket. This allows for quick set-up and adjustment when excessive endplay has been determined. Specs Material: Steel Inner Dia.: 1.240" Outer Dia.: 1.815" Thickness: 0.015"