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05-26-2017, 12:48 PM
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#1 |
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Registered User
 Join Date: Dec 2012
Location: INDIO, Ca
Posts: 34
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64 Rear Brake Drum
I have a 49 Chevy 3100 with a 64 GMC rear end. I need to replace a rear brake drum and it seems like finding a new one isn't possible. The drum is actually made in 2 pieces. The outer rim is cast iron and the "hub" is steel with the two pieces welded together. The dimensions are : 11" I.D. x 2-1/4". Overall height is 3-1/4". I've tried all the on line people like Brothers, Jim Carter, etc. Any suggestions where I can find one?
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05-26-2017, 01:01 PM
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#2 |
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Senior Member
Join Date: Nov 2012
Location: Southeast Michigan
Posts: 783
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Re: 64 Rear Brake Drum
That rear drum is the same as the fronts. There are constantly people on here giving away front suspension parts who have coverted to disc. Post a WTB ad or check the "Paying it Forward" thread. Should be easy to find one.
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05-26-2017, 04:18 PM
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#3 |
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I'm just glad to be here!
Join Date: Jan 2008
Location: Longview, TX
Posts: 4,788
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Re: 64 Rear Brake Drum
Can you post a picture of that two piece rear drum? In all the trucks I have seen and worked on, I never heard of a two piece drum...
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Karl  1965 Chevy Stepside(Grandpa's Old Blue) and (July 2015 Shop Build!)(2020, the Saga Continues) http://67-72chevytrucks.com/vboard/s...d.php?t=372424 The LST Challenge: http://67-72chevytrucks.com/vboard/s...=1#post7812257 Korbin's 1st Square: "Sunburn" http://67-72chevytrucks.com/vboard/s...d.php?t=418618 1985 GMC Sierra: "White Trash", Korbin's 2nd now... http://67-72chevytrucks.com/vboard/s...d.php?t=632305 Henry - 1984 Chevrolet, Owen's 1st Square |
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05-27-2017, 01:42 AM
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#4 |
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60-66 Nut
 Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: 64 Rear Brake Drum
A '64 GMC should have a Dana 44 differential. Those are very difficult to find drums for. A standard 12 bolt drum will not work. There is a thread here about one guys quest to find drums for his Dana 44. Sorry but I do not remember the members name or the drum he found to work.
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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05-27-2017, 01:52 AM
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#5 |
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Senior Member
Join Date: Feb 2011
Location: Corona, CA
Posts: 1,823
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Re: 64 Rear Brake Drum
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MusicMan70 1961 GMC Suburban |
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05-27-2017, 12:44 PM
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#6 |
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Registered User
Join Date: Dec 2012
Location: INDIO, Ca
Posts: 34
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Re: 64 Rear Brake Drum
I attempted to send a pic of the drum but was unable to. I've decided to go to a disc brake conversion, which begs the question, "How do I identify a Dana 44 diff"? Appreciate any help with this. I will keep trying to send a pic.
Thanks. |
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05-27-2017, 01:47 PM
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#7 | |
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Senior Member
Join Date: Sep 2016
Location: Denmark
Posts: 305
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Re: 64 Rear Brake Drum
Quote:
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05-27-2017, 05:56 PM
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#8 |
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Registered User
Join Date: Dec 2012
Location: INDIO, Ca
Posts: 34
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Re: 64 Rear Brake Drum
A picture is worth 1000 words! I have the DANA 44. I never cease to be amazed at the knowledge that exists on this website. Thanks for all your help.
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05-27-2017, 11:54 PM
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#9 | |
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60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: 64 Rear Brake Drum
Yes that is the thread I was thinking of......Thanks MusicMan70
Quote:
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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05-28-2017, 12:16 AM
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#10 |
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Registered User
Join Date: Jun 2016
Location: Novato, CA
Posts: 519
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Re: 64 Rear Brake Drum
The rear drum on a GMC rear-end is not the same as the front drum. The GMCs had rear leaf springs, not coil springs, and as a result, the rear drums are fatter from outside to inside.
I ended up getting some Wagoneer drums that were the right pattern but wrong hole sizes, and had them machined. It was expensive, but I am confident the shoe is making full contact with the drum, unlike going with a narrower drum. You can read the specifics in this thread. (as previously posted by MusicMan70)
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1965 GMC 1000 SWB Fleetside L6 230 - SOLD Thanks everyone for the help over the years. |
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