Product Overview The MYY5T is a 5-forward-speed plus 1-reverse, fully synchromesh manual transmission from the Isuzu MYY family. It features an aluminum alloy housing and a 5th gear overdrive ratio of 0.721, delivering highway cruising economy. Designed for Isuzu N-Series light-to-medium diesel trucks, it is matched with 4HF1, 4HG1, 4HE1, 4JH1, 4JJ1, and 4HK1 engines. Every unit is bench tested for shifting, oil sealing, and noise before shipment. Key Specifications Delivery