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07-26-2015, 07:26 PM
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#1 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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69 GMC rear brake drum
After owning her for 28 years I decided new brakes were in order. Having trouble locating the rear drums for my half ton 2wd. Drums are 2 x 11 all the way around. Have the fronts that are 3" deep. Rears are 3.5" deep. Local parts houses not having any luck. Any suggestions?
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07-26-2015, 07:38 PM
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#2 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
By the way, what is the spring for on the front drums?
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07-26-2015, 09:31 PM
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#3 |
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The Older Generation
   
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,771
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Re: 69 GMC rear brake drum
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Have you tried Rock auto? http://www.rockauto.com/ NAPA also lists them. Part Number: ND 4401071 LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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07-26-2015, 09:51 PM
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#4 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
Thanks for the reply.
Ya... They both show the 3" deep drums that fit on the front. |
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07-26-2015, 09:54 PM
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#5 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
They have a deeper "bell" than the fronts where the lug bolts come through.
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07-26-2015, 09:58 PM
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#6 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
A comparison......
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07-26-2015, 10:01 PM
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#7 |
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The Older Generation
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,771
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Re: 69 GMC rear brake drum
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What did you mean when you said in your first post that the drums are 2 x 11? That is what both of them list.... LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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07-26-2015, 10:03 PM
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#8 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
2"wide pads and 11" inside diameter drum.
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07-26-2015, 10:05 PM
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#9 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
Same pads on both drums.
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07-26-2015, 10:32 PM
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#10 | |
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The Older Generation
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,771
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Re: 69 GMC rear brake drum
Quote:
Do you know what rear end it has in it? I presume it is a leaf spring... LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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07-26-2015, 10:37 PM
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#11 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
Yes sir...with overloads. Spid says 3.73.
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07-26-2015, 11:10 PM
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#12 | |
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Registered User
Join Date: Jul 2015
Location: Homosassa, Fl
Posts: 1
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Quote:
Posted via Mobile Device |
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07-26-2015, 11:44 PM
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#13 |
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The Older Generation
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,771
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Re: 69 GMC rear brake drum
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Looks like a Dana rear. I would think drums would be available for that.... Did you check to see if they can be turned? LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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07-26-2015, 11:54 PM
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#14 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
The springs are leaf with over loads. Not part of the drum.
LockDoc - we might be able to turn them but I am skeptical. Original equipment with over 175k. They are UGLY!! |
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07-27-2015, 12:11 AM
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#15 |
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Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
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Re: 69 GMC rear brake drum
Take the drums to a local shop. They should have a measuring tool. The ones on my '69 were also original but already beyond maximum spec.
The wrap around spring is for vibration dampening purposes. If not too rusty they can be transferred to the new ones. Not really needed so are not included anymore. Ever been in a shop and see drums & rotors being turned on the lathe? A rubber strap must be wrapped around them otherwise they will vibrate and "sing". Results in a rough grooved finish. |
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07-27-2015, 12:23 AM
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#16 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
Sorry swm424... Too many springs. I missed your point.
GRX what was your solution? I am certain that we will not salvage these drums either. |
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07-27-2015, 02:17 AM
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#17 |
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Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
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Re: 69 GMC rear brake drum
I got new drums which are not like what you have. Yours are for the Dana 44 rear. Think LMC Truck sells them though not cheap.
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08-01-2015, 10:29 AM
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#18 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
Still have not found the right replacement drums for this truck. What are my alternatives?
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08-09-2015, 07:32 PM
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#19 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
I found a solution to my problem. I stumbled onto a thread started by a member with a similar issue. It made reference to a Raybestos 2067 drum. In checking the specs specs seemed to fit with the exception of the size of the lug bolt holes which are smaller than required. With the help of a 9/16 drill bit all is well and working great.
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08-09-2015, 07:35 PM
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#20 |
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Registered User
Join Date: Oct 2014
Location: Las Animas , Co
Posts: 30
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Re: 69 GMC rear brake drum
Back side.
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