72 Blazer 4x2... what in the 12 bolt? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

OC Short Box · 03-31-2011, 01:50 PM

Hey guys. Need help with identifying a 12 bolt rear diff. Im working on my buddies 72 K5, and it looks as though somebody swapped in a 1/2 ton 12 bolt that used to have axle perches on the top for leaf springs.(no longer there) I cant I.D. it first off, and second. It has a different wheel bolt circle diameter.

What diff should this thing have in it? (bolt circle and ton rating)
Can I easilly swap in the right axles from a 3/4 ton diff if thats what it needs?
and lastly, does anyone have the parts or diff I may need for sale?
Thanks! OC Short Box

03-31-2011, 01:50 PM	#1
OC Short Box Registered User Join Date: Jun 2010 Location: Orange County California Posts: 10	72 Blazer 4x2... what in the 12 bolt? Hey guys. Need help with identifying a 12 bolt rear diff. Im working on my buddies 72 K5, and it looks as though somebody swapped in a 1/2 ton 12 bolt that used to have axle perches on the top for leaf springs.(no longer there) I cant I.D. it first off, and second. It has a different wheel bolt circle diameter. What diff should this thing have in it? (bolt circle and ton rating) Can I easilly swap in the right axles from a 3/4 ton diff if thats what it needs? and lastly, does anyone have the parts or diff I may need for sale? Thanks! OC Short Box Last edited by OC Short Box; 03-31-2011 at 01:51 PM. Reason: thanks :)



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