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Old 12-18-2014, 12:53 AM
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mfain mfain is offline
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Default C5/C6/C7 Wheel bearings

Here is something that may interest some of you (if you like saving money). Those running C5/C6 front uprights and bearings know that the base and Z06 hubs are not as strong as the ZR1 hubs with their larger bearings and thicker wheel mounting flanges. But the ZR1 hubs are pricey - $350+. I just bought a C7 hub assembly (GM 20981829) to measure. It does not have the wheel speed sensor or the splined center (front wheel only), but a splined rear hub assembly is available. the GM list price is $169.64, but it is listed cheaper at places like Rock Auto. The AC Delco number is FW412. The good news is that the bearing has the same bolt pattern and inside and outside registers as the C5/C6, so it fits a C5/C6 upright, AND it has the same wheel mounting flange thickness as the ZR1 and the outer diameter of the casting at the bearing is the same as the ZR1, which is .5 inch larger than the standard C6. My conclusion is that it uses the same large bearing as the ZR1 hub. I've included a couple of pictures showing the C7 hub assembly in a ZR1 (C6) upright, a C6 Z06 hub, and a ZR1 hub in an ATS spindle (designed to use C6 bearings).

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Last edited by mfain; 12-18-2014 at 01:27 AM..
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Old 02-03-2019, 03:28 PM
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phantomjock phantomjock is offline
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PAPPY! My Hero!
Touchdown - on Superbowl Sunday!
I've been crawling all over the InterWeb for this -- and it was here all along.
My entry was through PT - of all places.

Now if I could only find/get the loads (thrust bearing) data!

Thanks, and

Cheers - Jim

May your favorite team win -as long as its the Patriots!
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One thought leads to another. If these thoughts link into a chain we become bound to the project. This bondage is subtle and remains until we complete the tasks -- or, STOP Thinking!
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Old 02-04-2019, 09:50 PM
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phantomjock phantomjock is offline
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Default Confirmed!

I just got off the phone with Dan @ Van Steel. He confirmed for me that GM was so impressed with the SKF Racing Bearings, they went with SKF from 2010 onward.

So, Pappy's observation and analysis was spot-on. If you buy the AC Delco FW412 - it is the equivalent of the Racing Bearing!

Yippie!!

Thanks Pappy! Thanks GM!

Cheers - Jim
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