The Lowest gear for the R151-R150 trans is either a 4.30 (Stock Turbo R151 trans) or a 5.15 from a Hino truck. We have no clue as to what the trans from the HZJ79 looks like.
![I Dunno... :dunno:](https://board.marlincrawler.com/Smileys/marlin/dunno.gif)
Much less ever seen one in person. Heck if you what us to figure it out ship us a truck and we will see what we can do. Be sure to put attention "DEAN" on it... sorry we couldn't help.......... Dean