Axle width

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NoahSewal

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When people say an A body 8 3/4 is 52 5/8 wide flange to flange is that the inside of the flanges or outside?
 
Typically there are 3 measurements

  1. Perch width
  2. Housing flange width
  3. Axle flange width
  4. Drum to drum width

  1. Perch: is center to center (you can also measure inside of one to outside of the other to get center to center)
  2. Housing flange: is outside of the housing end to outside of the housing end (outside of housing end flange where bearing retainer would touch)
  3. Axle flange: is outside axle flange to outside axle flange (the surface where the drums would touch)
  4. Drum to drum: Is the outside of the drum to outside of the drum (the surface where the wheels would touch)
An accurate 8 3/4" rear axle width list
 
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