M-300
1969-73 		M-375
1969-73
Early Late Early Late
Front Brakes Type Drum Drum Drum Drum
Make Bendix Bendix Chrysler Bendix
Actuation Duo-Servo Duo-Servo Lockheed Duo-Servo
Drum/Disc Size 12 1/8" x 2" 12" x 3" 14.12" x 2" 14.2" x 2.5"
Lining Area
(Per Axle) 		104.7" 147.4" 119.3" 143.4"
Wheel Cylinder Bore 1 1/8"
(1.125") 		1 1/8"
(1.125") 		1 1/2"
(1.5") 		1 1/16"
(1.063")
The Chrysler version is mentioned in the Dodge MH Chassis Manual but is not in supported in either the Dodge MH Chassis or Parts Manual.
M-300
1969-73 		M-375
1969-73
Early
(Note 1) 		Late
Rear Brakes Type Drum Drum Drum
Make Bendix Bendix Bendix
Actuation Duo-Servo Duo-Servo
(Note 2) 		Twinplex
(Note 3)
Drum/Disc Size 13" x 2.5" 12" x 3" 14 1/8" x 3"
(14.125" x 3")
Lining Area
(Per Axle) 		133.2" 147.4" 173.1"
Wheel Cylinders
(Per Axle) 		1 1 2
Wheel Cylinder Bore 1 1/2"
(1.25") 		1 1/16"
(1.063") 		1 3/8"
(1.375")

M300 / M375 Rear Wheel Notes:

  1. This drum size is not in supported in the Dodge MH Parts Manual.
  2. M300 Parking Brake was moved to rear wheel on 1 April 72.
  3. M375 - Prior to Febuary 1971, M375 has a single hydralic system and the rear upper/lower wheel cylinders are interconnected. After Febuary 1971, M375 has a split Front/Rear hydralic system and each rear upper/lower wheel cylinder was fed individually.
M-300
1969-73 		M-375
1969-73
Early Late Early
1969-1971 		Late
1972-1973
Master Cylinder Make Bendix
(Dual) 		Bendix
(Dual) 		Chrysler
(Single) 		Wagner
(Dual)
Bore 1 1/4"
(1.25") 		1 1/8"
(1.125") 		1 1/2"
(1.5") 		1 3/4"
(1.75")
Stroke 1 5/16"
(1.31") 		1 5/16"
(1.31") 		1 7/16"
(1.44") 		1 31/64"
(1.48")
M-300
1969-73 		M-375
1969-73
Early Late Early
1969-1971 		Late
1972-1973
Power Brake Booster Make Midland Ross Bendix Midland Ross Bendix
Model C-490G Master-Vac C-464R Hydro-Vac
No. Used 2 1 1 2
Mounting Frame Rail Bracket with Master Cylinder Frame Rail Frame Rail
Brake Warning Switch Yes Yes No Yes