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Transmission rebuilding requires specialized tools that are not found in your average toolbox. Shown here are just a few of those needed to work on the 4L60E. From top, left to right: Cotter key pick, Teflon shaft installer, rear clutch spring compressor, universal pump remover, electrical connection removal tool (a large socket will work but usually breaks a tab) and two snap-ring pliers. Not pictured are the front pump alignment band and turbine shaft installer. This might be an expensive do-it-yourself project.