Remanufactured Mercedes Medium Duty Transmissions

The six-speed Mercedes-Benz manual transmission is offered in two versions - the direct drive MBT520S-6D for trucks up to 40,000 pounds GCW, and the over-drive MBT660S-60 for trucks up to 60,000 pounds GCW. 

The MBT520 has an overall gear ratio of 9.20, for engines that produce peak torque up to 520 foot-pounds. The MBT660 is for engines up to 660 foot-pounds peak torque, with an overall gear ratio of 9.18. The Mercedes-Benz transmission is compatible with medium-duty diesel engines built by Caterpillar, Cummins and Mercedes-Benz.

Weller Truck Parts Remanufactured and New Hydraulics and PTOs


The transmission is found in Sterling Acterra M5500, M6500, M7500 and M8500 models and Freightliner's M2, FL 50, FL 60,FL 70 and FL 80 business Class trucks working in numerous applications.

Cross References

MBT520S-6D = G60-6 Direct Drive
MBT660S-6O = G85-6 Overdrive

Related Parts

Clutch Kit: 3400001167