Claim: Most M880/M890s were equipped with the Loadflite 727 3-speed automatic transmission and front disc brakes and rear drum brakes.
Evidence: All M880/M890s were powered by Chrysler's 5.2L 318 gasoline engine with a two-barrel Carter or Holley carburetor. Most were equipped with the Loadflite 727 3-speed automatic transmission, though a few left the factory with a 4-speed manual. The trucks were equipped with front disc brakes and rear drum brakes.