GM-50911 is a set of three tools that correctly install and compress the turbine shaft to the 45678R clutch housing, utilizing three solid Teflon seals. GM-50911-3 is a 3.1" long, 1.2" OD smooth tube with an adjustable depth stop-rod that extends over the end of the turbine shaft, protecting the three seals from damage as they slide down the shaft. GM-50911-2 has expandable fingers that snugly fit the protector and evenly push the seals down the protector into their respective grooves on the turbine shaft without over-expanding the seals. GM-50911-1 has a tapered ID that gradually compresses the seals to the correct OD, allowing them to slide inside the 45678R clutch housing without being nicked or cut.