I believe it is a new gadget to allow for aligning the axles without bending the actual axles themselves. In the regular method of mounting there is no way to adjust the mount to correct any misalignment of the axles other than by bending the tube itself if the mount is not placed exactly in the right spot on the frame.
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Mike Nancy and the fuzzies
Fulltiming since June 2004
Volvo 660 MH tow vehicle
2005 MS 38RL
2007 Saturn Ion "toad"
2010 Gold Wing "piggyback"
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