AutoZone Bearing
I'm working on a 72 Dart with 7.25 rear with 10" brakes, got a new bearing off ebay that said for 72 dart with 10" brakes & 7.25 rear, But it was too big in center, part # of it was skf rwc35-yyr

So now I'm thinking of just going with the autozone one, but someone put on it that its undersized, what do you all think?

He's been told repeatedly what's up, but he wants to hear what he wants to hear.

72 mopar axle bearing part number is 3420090 It`s not listing a difference for 9 or 10 inch brakes.

This horsepoop has got to stop. There is no such thing as an Autozone bearing!!!!!

For there to be one, Az would have to have a bearing factory and the plain and simple fact is, Autozone makes nothing. Period. They even have their sale flyers printed by a contractor. And this is exactly the same as O'Reilly's, Advance Auto, CARQUEST, NAPA, even Harbor Freight.

All these companies give their brand names to items that are made by others. That's how life works. Shoot, even back in the day, GM didn't make many of their frames, they were made by Budd. And Chrysler used Budd, too This is just one example.

And another thing - bearings are made to international standards. You, the designer, look in the bearing catalog and find what will work acceptably and then you make the part fit the bearing. Talking about rolling element bearings. It's been this way for at least 80 years.

Seals are the same. Many of the smaller parts you find on your car are made by a specialty company and picked out by the designer. O-rings are another, with standardized sizes across the globe (well, maybe not in France).

So if the bearing that someone bought from Autozone doesn't fit properly, either it was made with no quality control or else the shaft or bore it pushes against was made the wrong size. Or else the person trying to assemble it doesn't know how it is supposed to fit.

R.