Help with brake wheel cylinder - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jj72c10 · 04-12-2009, 10:59 PM

I have a question regarding replacement wheel cylinders for the rear brakes. I have a 72 C10 half ton I am redoing. I just finished putting a new Eaton posi in the rear and was replacing all the brake components as well. I went to replace the wheel cylinders and none of them would fit. I went to O'Riellys, AutoZone, Advanced Auto and CarQuest. Everyone any of them had was different then the originals I took off. They were too wide and would not fit between the ears on the backing plate. The rearend is the original in the truck, I was able to verify that. The factory number on the original cylinders cross-referenced to the new bigger castings. What I did find out is that the rebuild kits for the 6 cylinder trucks which mine was originally matched what I took off. If I wanted a complete new wheel cylinder, they were bigger. Has anyone ran into this problem? I bought the rebuild kits and honed my originals out but would rather buy new. Help!

Thanks,

JJ

**N2TRUX** · 04-14-2009, 08:05 AM

Anyone?

SCOTI · 04-14-2009, 09:36 AM

Last time I did my 68 in '00, the replacements I picked up @ OReilly's fit. Maybe someone else can offer a more current experience.

04-12-2009, 10:59 PM	#1
jj72c10 Registered User Join Date: Dec 2008 Location: Cedar Rapids, IA Posts: 24	Help with brake wheel cylinder I have a question regarding replacement wheel cylinders for the rear brakes. I have a 72 C10 half ton I am redoing. I just finished putting a new Eaton posi in the rear and was replacing all the brake components as well. I went to replace the wheel cylinders and none of them would fit. I went to O'Riellys, AutoZone, Advanced Auto and CarQuest. Everyone any of them had was different then the originals I took off. They were too wide and would not fit between the ears on the backing plate. The rearend is the original in the truck, I was able to verify that. The factory number on the original cylinders cross-referenced to the new bigger castings. What I did find out is that the rebuild kits for the 6 cylinder trucks which mine was originally matched what I took off. If I wanted a complete new wheel cylinder, they were bigger. Has anyone ran into this problem? I bought the rebuild kits and honed my originals out but would rather buy new. Help! Thanks, JJ

04-14-2009, 08:05 AM	#2
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,021	Re: Help with brake wheel cylinder Anyone? __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

04-14-2009, 09:36 AM	#3
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,064	Re: Help with brake wheel cylinder Last time I did my 68 in '00, the replacements I picked up @ OReilly's fit. Maybe someone else can offer a more current experience. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

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