Was the seal/DS design changed from oem design? Working on a '89 RS, trying to replace the seal (that protects the inner needle bearing in the hub) and couldn't find an exact looking match. Bought the seal NAPA listed (SKF 20448) and while trying to install, the damb thing BROKE. Looks like a 2 piece unit (2 "O's" glued together). So I took the whole hub to NAPA to get their opinion, and broke 2 more. Looks to be held together by 2 "hot glue" spots. I'm wondering if it's designed to separate for installation, then maybe it's glued/epoxied back together before assemble? Thanks, Tom.