1999 - 1/2 & Later-Series & W5 with Isuzu MLD6Q 6 -Speed manual transmission The input shaft seal on the Isuzu MLD6Q 6 - Speed manual transmission must be driven into the front transmission cover to a specific depth. GM-29162 is designed to install the input shaft seal to the correct depth for proper sealing to the input shaft. The seal is placed over the input shaft and into its housing. GM-29162 is installed over the seal, and used with a rubber mallet to drive the seal into position.