Brake drum help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

john64 · 10-01-2007, 11:23 AM

Hi I have just bought new drums for the rear of my 1967 gmc leaf sprung 1/2 ton. The inside of drum seems the same 2''. Problem is new brake drum middle dont seem to be deep enough. When fitted seems to be 1/2'' gap to backplate. The centre bowled bit on old drum seems to be 1/2'' deeper. When I check brake sites online drums seem to list only one kind. Part number stamped inside old drum is 34990. Anyone tell me what I've got wrong ?? I cant just go to local parts shop as I am in Scotland and have to order from USA if I need parts so would like to find out if its me or parts shop thats got it wrong.

Thanks
John

10-01-2007, 11:23 AM	#1
john64 Registered User Join Date: Jul 2007 Location: Tayport, Scotland Posts: 11	Brake drum help Hi I have just bought new drums for the rear of my 1967 gmc leaf sprung 1/2 ton. The inside of drum seems the same 2''. Problem is new brake drum middle dont seem to be deep enough. When fitted seems to be 1/2'' gap to backplate. The centre bowled bit on old drum seems to be 1/2'' deeper. When I check brake sites online drums seem to list only one kind. Part number stamped inside old drum is 34990. Anyone tell me what I've got wrong ?? I cant just go to local parts shop as I am in Scotland and have to order from USA if I need parts so would like to find out if its me or parts shop thats got it wrong. Thanks John



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