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 Brake drums- same part #, different drums?

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ckamin




Posts : 51
Join date : 2023-02-05
Location : Rapid City, SD

Brake drums- same part #, different drums? Empty
PostSubject: Brake drums- same part #, different drums?   Brake drums- same part #, different drums? Icon_minitimeThu May 11, 2023 7:50 pm

Howdy!

I ordered a set of AC Delco replacement brake drums from Rock Auto (AC Delco part #18B4). One has the specs stamped on the outer face while the other doesn't. The one without the specs stamped on it has balancing weights. The size, bolt pattern, cooling fins and everything else appears to be identical.

Can anyone explain why this might be? Were these supplied to AC Delco by different vendors?

Thanks!
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Fred Kiehl

Fred Kiehl


Posts : 7283
Join date : 2009-11-13
Age : 76
Location : Largo, FL 33774

Brake drums- same part #, different drums? Empty
PostSubject: Re: Brake drums- same part #, different drums?   Brake drums- same part #, different drums? Icon_minitimeThu May 11, 2023 9:22 pm

Some balance "as is" from the casting, just like wheels. The lack of specs may be from different foundries.
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