by brian_bp » Sun Mar 09, 2008 5:51 pm
The rubber suspension system works the same either way up, so flipping the whole assembly to from a "down" starting angle to an "up" starting angle would work fine, except...
There is normally that bend for camber in the main tube which goes across, and you don't want the negative camber which mounting upside down would cause.
With a used axle, I would wonder if the distortion (or "set") of the rubber might cause problems when used the other way.
The bracket is intended to take load in a known direction, and flipping it over without welding on new brackets (because that does kill the rubber) would require consideration of structural loads. There are trailers which use similar axles this way, because that's how the brackets are integrated into notches in the frame rails.
So my net conclusion, like Jester, is go ahead if there is no camber... but I'll add to put some thought into the bracket structure.
As for the height... the rubber acts the same way in the opposite direction, so the change in hub height per unit of load (inches per hundred pounds, or mm per some number of kg) will be the same as stock units... turn the drawing over and check it out.