Dodge M-series chassis
The Dodge M-series chassis were a line of heavy-duty frames used under various Class A motorhomes from 1968 to 1979. All M-series chassis use a Dana 60 or 70 solid rear axles with leaf springs. Frames were used by Winnebago, Champion, Apollo MotorHomes and several other RV manufacturers. The line was offered in four ratings, M-300, M-400, M-500, and M-600 depending on the application. The M600 was offered with the Rockwell F-130-NX rear axle, with a 4.88:1 gear ratio.
By 1979, Chrysler Corporation no longer sold incomplete chassis and ended production of the M series.
The M series was available with three engines during its production: The 318 polysphere Chrysler A engine, the 413 cid, and the 440 cid Chrysler RB engine.
