Hi I'm new to the forum. I've been considering a class b RV for several months and the Ford 4X4 SMB really appeals to me.
I would also like a diesel drivetrain which would mean buying a used SMB or a pre 2010 van with a diesel engine.
Question is do SMB do the 4X4 conversion on older vehicles ? I think I read somewhere that they only convert new vans ?
Well good for you! Now at least you know what to look for. In the past a lot depended on their 4x4 work load which is much lower these days. As far as the rear axle, he's just probably just trying to save you a little money cause they should be able to install a full floater with those gears and even a locker if you wish.
2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer