Search results

For all those of you who own an M939 series truck, have you ever tried doing anything to make it whistle like a Deuce? For Cummins diesel engines, that should be easy. But, what I am curious about is whether or not the intent to make it whistle as loud as a Deuce may strain the Allison MT654CR...

Since the standard M939 series powertrains seem to lack on low-end torque given that the Allison MT654CR transmission is only suited for engines producing up to 625 lb/ft of torque when used for heavy truck applications (hence the old-hat Cummins NHC250 for the A1s, or the Cummins 6CTA8.3 240 hp...