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NorCalC20LWB · 06-25-2016, 01:20 PM

Want to redo the rear brakes/wheel cylinders on my 72 C20, but not sure what to get. The rear axle is obviously not original, looks more like a late 80's early 90's maybe?? Anyway, therein lies my problem, what parts do I get? Here's what I know: brake drum came right off after lug nuts were taken off, no need to pull the axle, etc. The drum measures 13" inside diameter, by 2-1/2". The ring gear has the following numbers: 2 GM 14012786 11 41 12 63. Would think the "11 41" means 3.73 gear ratio (41/11=3.73). Think maybe the "012786" means January 27, 1986?? So maybe I get brake parts for a 1986 2500??

I'm lost as to what to get, any help is definitely appreciated!
Brian

06-25-2016, 01:20 PM	#1
NorCalC20LWB Registered User Join Date: Mar 2015 Location: Bigfork, MT Posts: 466	Rear end brake id help please... Want to redo the rear brakes/wheel cylinders on my 72 C20, but not sure what to get. The rear axle is obviously not original, looks more like a late 80's early 90's maybe?? Anyway, therein lies my problem, what parts do I get? Here's what I know: brake drum came right off after lug nuts were taken off, no need to pull the axle, etc. The drum measures 13" inside diameter, by 2-1/2". The ring gear has the following numbers: 2 GM 14012786 11 41 12 63. Would think the "11 41" means 3.73 gear ratio (41/11=3.73). Think maybe the "012786" means January 27, 1986?? So maybe I get brake parts for a 1986 2500?? I'm lost as to what to get, any help is definitely appreciated! Brian Attached Images