Note:
For parts that are no longer available, there are several places that can recondition your existing parts. While the prices maybe higher, for some things they are the only resource avialable. Additionally, they may be the only ressource for some brake parts. One of the best resources for locating these companies is the classified section of Hemmings Motor News.

Notes

  1. While I have assembled a large amount of data in one place, almost all of it is from other resources so double check to verify you are getting the correct part.
  2. Most Dodge MH chassis versions are listed at the Bendix site. M300 is listed under Dodge Truck. All other versions are listed under Dodge. The NAPA P/N's listed on the Bendix site use an old NAPA format and are likely to be incorrect. Cross reference the Bendix number at the NAPA site.
  3. 1969-73 M375 - Info can be combined with M300 or listed seperate as M400.
  4. 1973-74 - General rule of thumb, RM350 is listed as M400; RM375 is listed as M500; RM400 is listed as M600.
  5. Because of the coding used in the Dodge MH Parts maual, it can be confusing at times to determine which part number you need. You not only need the year model, you need the chassis key code from the first page of the parts manual. The following table is a condensed version of the key code information.

    Model 1969-73 1973-74 1975-Up
    M300 M3 ------- M3
    M375 M4 ------- -------
    RM300 ------- R3 (M300) -------
    RM350 ------- R4 (M400) -------
    RM400 ------- R5 (M500) -------
    M400 ------- ------- M4
    M500 ------- ------- M5
    M600 ------- ------- M6

  6. The following vacuum booster cross reference information is buried in the Dodge MH Parts manual. I am listing it here for convience.

    Chrysler Bendix Midland
    Ross
    3549079 2509788 C-4068-C
    3549080 2509786 C-4604-A
    3632657 2510958 -------
    3632844 2509794 -------
    3632846 2510965 -------
    3633549 2510090 -------
    3732195 2510728 -------
    3744424 2510764 -------
    3893594 2511572 -------
    4030334 2512063 -------
    4031352 2770004 -------

Sources/Resources

  • Bendix
    Various Local Neighborhood Distributors
    Most of the interchange information here came from Bendix.
    Bendix has the most complete brake parts listing on the net for Dodge MH.
    Under application lookup, select Heavy Duty On Highway.
    For M300, select Dodge Truck. For all others (M400, etc) select Dodge.
  • NAPA
    Various Local Neighborhood Stores
    You can locate many Dodge MH brake parts through NAPA.
    M300 parts can usually be looked directly up via the NAPA application
    For all others, use their P/N Interchange ability. I have found looking up the part on Bendix then using the NAPA interchange ability etremly useful.
    Much of what I have posted here used this function.
  • Federal-Mogul (Wagner)
    Various Local Neighborhood Distributors
    Use their P/N Interchange function.
  • Raybestos
    Various Local Neighborhood Distributors
    Use their P/N Interchange function.
  • Merit Truck Parts & Wheel Company
    Note: Website is no longer online
    1638 South Wabash Avenue
    Chicago, Illinois, 60605
    Phone: 312-427-3788; Fax: 312-427-3911
  • Arizona RV Salvage
    2737 W. Lincoln
    Phoenix, AZ 85009
    Phone: 602-272-0301; Fax: 602-484-0918
    New and used hubs, rotors, axles, running gears and rear ends
    New and used plumbing, cooling, lighting, appliances, windows, doors, holding tanks.
    Vast inventory, will ship nationwide.
  • KIC Holdings Inc.
    3800 Fruit Valley Road
    Vancouver, WA 98660
    Toll Free: 800-488-5422; Phone: 360-823-4440; Fax: 360-823-4441
    Since 1972, KIC has been providing truck and trailer parts to the world's OEM and aftermarket users. Now, KIC is one of the fastest growing wheel end suppliers of hub/drum, rotor and brake drum products.
    KIC is a manufacturer. You will have to contact them to locate a distributor of their products.
  • DuraBrake Co.
    Mailing:
    DuraBrake Co.
    PO Box 1480
    Los Altos, CA 94023    		 Physical:
    1951 Colony St, Unit P
    Mountain View, CA 94043
    Phone: 650-210-9315; Fax: 650-210-9311
    DuraBrake Co. was started as Durametal Brake Co. in 1998 upon acquisition of the brake drum business from Durametal Corporation in Tualatin, Oregon. Under new ownership, the goal of this company is to become the leader in brake drum, brake disc, and hub market for trucks, buses and off-highway vehicles.
    Source for Dodge Rotors and drums.
    DuraBrake is a manufacturer. You may have to contact them to locate a distributor of their products.
  • Precision Rebuilders, Inc.
    350 North Commercial
    St. Clair, MO 63077
    Toll Free: 800-325-2690; Phone: 636-629-1444; Fax: 636-629-4382
    Leading remanufacturer of a wide variety of parts for medium and heavy duty trucks. Products produced include:
    • Hydraulic brake boosters
    • Master cylinders
    • Calipers
    • Water pumps
    • Starters and alternators
    Precision Rebuilders is a manufacturer. You may have to contact them to locate a distributor of their products.
  • Alretta Truck Parts Inc.
    Mailing:
    Alretta Truck Parts Inc.
    P.O.Box 596
    Sherborn, MA 01770-0596    		 Physical:
    1 Watson Place
    Framingham, MA 01701
    Toll Free: 888-257-3882; Phone: 508-788-9409; Fax: 508-788-9499
    Parts of all 1965-1981 Dodge chassis, M300, M375, M400, M500, and M600. They also supply parts for the brakes of Ford P450 and Chevy P30 MHC chassis, 1967 - 1998. and related components such as pads, hub seals, wheel bearings, brake hoses,calipers remanufactured, caliper hardware, and specialized brake fluids for severe duty use..