Product Feature: Application: Fits for GM 200, 200C, 200-4R TURBO 350, 350C TURBO 400, 425, 475 GM 700-R4 GM 4L60 GM Allison - 540 Function: A must have tool to remove the leaky seal around the shifter selector shaft mechanism through the transmission case. Easy to Use: A must have tool to remove the leaky seal around the shifter selector shaft mechanism through the transmission case. No need to remove the transmission disc. In most cases, even not necessary to lower the transmission. .