MYY & MZZ Transmission-1 INTRODUCTION 1 2 3 1. MYY 5 Speed 2. MYY 6 Speed 3. MZZ 6 Speed The 2003 model year vehicle with manual transmission model, MYY & MZZ type transmission has newly adopted instead of MXA & MBP type. By reason of construction change, transmission weight is reduced and allowable maximum input torque is upped. The MYY type has mainly employed to 4J series engine which is mounted NHR, NKR or some NPR tracks. And, it has also employed to 4H series engine with low output which is mounted NKR or NPR trucks. The MZZ type has mainly employed to 4H series engine with high output which is mounted NPR or NQR tracks.
Both type of transmission has very similar features, and construction & operation are nearly same. So that, the service procedures such as overhaul repair will be understood by disassembly either MYY or MZZ .