IH 434 / Bad differential bearing

The right side roller bearing cup in the differential has some major divots/damage. I've visually inspected the other bearings in the differential and they appear OK. I've convinced myself that I need to replace the bearing cup at a minimum.

Looking for any advice:
1/ should I replace the right side roller bearing AND the cup even though the bearing looks OK?

2/ Only place I can find to order the bearing cup is www.external_link. P/N 86500721 for $63.81. Any other ideas where I can order this Timken bearing? The original Timken number for the whole bearing is 3044002R91 and it cross references to a 482/472. All my searching has not produced any US distributor where I can order it.

Best I can tell from the Timken failure analysis pics is that the bearing was exposed to water and corroded. It makes sense because I do have a leak between the differential cage and diff housing, but doesn't make sense because the other bearings appear OK.
 
Troy, try an online parts search at Napa for the 3044002R91 number, select "interchange". Napa number is BRG BR482, $71.99.
Charlie
 
Nice call on the NAPA advice... I found it. not sure it comes with the cup as the picture only shows the bearing. NAPA's not picking up right now, so assume they are closed for the day. Will try tomorrow.
 

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