Kent-Moore Tools Kent-Moore DT-49101 Installer, Manual Shaft Seal For GM / General Motors. DT-49101 installs the manual shift shaft seal squarely into the case bore without damage to the sealing lip. The tool has a counterbore that allows the seal to be installed while the manual shaft is still in place in the transaxle and the transaxle is still in the vehicle. This eliminates removal of the entire transaxle to replace the seal. Email for availability.