SMI and M&G braking compatibality

[aggies09]

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.

[Gil_J]

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.

[Fratto]

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.