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Thread: SMI and M&G braking compatibality

  1. #1

    Default SMI and M&G braking compatibality

    I am curious if anyone out there has an SMI unit on their coach and a M&G unit on their toad. The guys at M&G tell me it should work fine, but I am curious if there is any practical experience out there. Let me hear from you.
    Tony and Jenny Conder
    Abilene, Texas
    - - - - - - - - - - -
    2008 Marathon D/S XLII
    2017 RAM 1500 4x4

  2. #2
    Join Date
    May 2012
    Location
    Beverly Hills
    Posts
    4,652

    Default

    Tony,

    Both systems simply supply metered brake system air to the tow vehicle. It's just that Air Force one does so with Prevost aux air being extended to the towed while M&G supplies actual brake system air. Both are done at the same proportional rate determined by the pressure on the brake pedal. I can only guess SMI received a patent on their implementation otherwise their simple method of using auxiliary would certainly be done by M&G. The SMI implementation is safer.


    Gil and Durlene
    2003 H-3 Hoffman Conversion

  3. #3
    Join Date
    Apr 2019
    Location
    Arlington
    Posts
    752

    Default

    We have an older Air Force One unit. We initially put it on a diesel Jetta behind a Winnebago Ultimate Freedom then moved the system to a 2003 wrangler and our 1998 Country Coach. We have never had any problems.


    Mark and Debbie Fratto
    1998 Parliament

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