lets discuss rotors and how they fit the hubs.
The rotors I have on the 2007 axle are eqivelent to NAPA # 86828.
Catalog page, rotors by size They have a measured 4.836" bore (catalog list 4.830")
PICTURE Both Right Gear and Axle as well as The Hollister Road Company use a rotor equivalent to NAPA # 86830 which is very very similar to the rotors that came on my late model axle but these have a 4.641" bore (measured)
PICTURE PICTURE showing difference in these 2 rotor bores.
Lets compare these bores to that of the 14 bolt or Eaton brake drum we'd like to replace.
PICTURE 14 bolt Drum and
PICTURE Eaton drum These drums measure 4.597" ID, and fit snug on their hubs.
Pictures of the different rotors on 14 bolt hubs:
PICTURE Larger ID, sloppy fit.
PICTURE Smaller ID, still 0.044" of slop (quite noticeable).
I don't think either rotor is ideal because I want the rotor to be well supported and centered by the ID fitting snug on the hub OD. Just the same as all the drums and rotors in question fit in their respective/original hubs.
One possible solution is use the larger ID rotor and make a bushing to shrink fit on the hub.
Another solution is use either rotor and machine the flange on the hub thinner at the same time turning a snug pilot to fit in the rotor.
Grigg
