Where to find GMC rear brake drums??

[azlamm65GMC]

Been searching for rear brake drum for my '65 GMC 1/2 ton. Anybody have suggestions or have a good one willing to sale. This is last part I need for restoration, I found one on eBay but can not find another one that's usable at
Least. Here is one I bought off eBay it has its 11"x2" but instead of the Chevy which are flat it an offset.

[jtrichard]

HERE'S your solution http://67-72chevytrucks.com/vboard/s...d.php?t=614719

[franken]

I asked NAPA and this is what came back...

Part Number: ND 4401137
Product Line: NAPA Drums
1965 GMC Truck 1500

[jtrichard]

franken those are 3/4 ton his is a 1/2 ton

[sampsmit000]

Is their a difference between chevy and gmc? I have a chevy 1/2 thats in awesome shape.

[T Herder]

Try here http://www.centricparts.com
They showed them in stock this AM
Best regards,
T Herder

[61K10]

there was a thread on this. gmc used a dana rear axle. used jeep drums with the center hole enlarged. Doug somebody??

[azlamm65GMC]

Thanks for all the suggestions, yea I searched the forum about this issue so I'm not asking a question that's already been answered. I read that thread about using the jeep ones but never saw if that actually worked or not and I look everyday on eBay and for that centric 122.66037 but always says out of stock. Does anyone know if going with the jeep drums works or anyone that would have the centric 122.66037?

[61K10]

well-- he made them work and i read the whole thread.

[jtrichard]

http://67-72chevytrucks.com/vboard/s...=614719&page=3
post #70 is the finished drum

[franken]

Sorry, I thought 1500 was half ton. Here's the same for a 65 GMC 1000, but it also says coil springs...
I'll stop helping

Part Number: ND 4401071
$27
NAPA says its in stock...

Attributes:
# of Bolt Holes : 6
I.D. (Inches) : 11"
I.D. (mm) : 279.4 mm
Width (Inches) : 2"
Width (mm) : 60.96 mm
Bolt Circle Diameter : 11.52 mm
Brake Drum Surface Depth : 61.0 mm
Center Bore Diameter : 90.62 mm
Height : 76.2 mm
Height (Inches) : 3"
Height (mm) : 76.2 mm
Inside Diameter : 279.4 mm
Maximum Discard Diameter : 281.69 mm
Mounting Type : Composite
O.D. : 314.0 mm
O.D. (Inches) : 12"
O.D. (mm) : 314 mm

[jtrichard]

For what ever reason (more back set with leafs?) they used different drums with leaf spring vs coil

[VonDog]

Originally Posted by azlamm65GMC

Thanks for all the suggestions, yea I searched the forum about this issue so I'm not asking a question that's already been answered. I read that thread about using the jeep ones but never saw if that actually worked or not and I look everyday on eBay and for that centric 122.66037 but always says out of stock. Does anyone know if going with the jeep drums works or anyone that would have the centric 122.66037?

I don't know about the jeep ones but I found my hard to find drums from rockauto! Here's what I found for you. Hope this helps.

[jbgroby]

Would this fit? http://www.ebay.com/itm/Raybestos-20...BWHxWz&vxp=mtr

[jtrichard]

NO there has to be an back set from the bolt flange

[azlamm65GMC]

Is the centric 122.66037 exactly like the original? Been looking everywhere for it and it always says out of stock.

[azlamm65GMC]

Finally found the centric 122.66037 through the centric.com website, they don't sale parts but they lists the places they distribute to. Before I buy it just want to see if anyone has bought these and used them on their GMC, I have a '65 GMC 1/2 ton don't want to spend $120 each and get here and not right ones? Here is link to website and picture
http://www.partsbossonline.com/ShopB...Rotors&mode=PA

[Captainfab]

I don't know this for certain but my guess would be that if the trailing arms and coils were ordered on a '63-'66 GMC, the 12 bolt may have been used instead of the Dana 44 as was used with leaf springs.

Originally Posted by jtrichard

For what ever reason (more back set with leafs?) they used different drums with leaf spring vs coil

[slorio]

Azlamm:
Raybestos 2067 is the other choice. It is for the front of a 72 4 wheel drive Blazer since the 4 wheel drive also uses a Dana 44 differential. Read all about it here:

http://67-72chevytrucks.com/vboard/s...d.php?t=412665

Hope this helps.
Regards,
Steve
New Orleans

[jtrichard]

Originally Posted by Captainfab

I don't know this for certain but my guess would be that if the trailing arms and coils were ordered on a '63-'66 GMC, the 12 bolt may have been used instead of the Dana 44 as was used with leaf springs.

Had not thought of that that..... would make sense that they used Chevy rear when ordered with coils

[Praxiss454]

Originally Posted by azlamm65GMC

Finally found the centric 122.66037 through the centric.com website

azlamm65GMC - did you end up getting those centric drums from partsbossonline? If so, how was your experience purchasing from them?

I've got a 65 GMC w/ rear leaf springs and can't find the right drums anywhere.

[Bill66K1000]

azlamm65GMC, curious to know what your final solution was. Looks like I'm in the same boat. Tried a few options, guess I need to track down part numbers also to compare.

[Praxiss454]

Originally Posted by Bill66K1000

azlamm65GMC, curious to know what your final solution was. Looks like I'm in the same boat. Tried a few options, guess I need to track down part numbers also to compare.

Bill I assume you've seen this thread? http://67-72chevytrucks.com/vboard/s...d.php?t=614719

I ended up getting Wagoneer drums at NAPA and paying a small fortune to get the center hole machined to the right size. They fit like a glove though, and the brake shoe is fully covered.

[Bill66K1000]

Glad to know you got something to work. I worked parts industry for years and never came across something like this, I was starting to think that my grandpa swapped this axle into it and since he's passed, there was no way of figuring out what it was out of but after reading through your thread and reading on the 6066gmcguy website it seems to be original. But I'll remember the 74 wagoneer drums. Thanks again

[flynn]

I originally posted in Rogers "rear brake dilemma" thread that I was going to use the 8106 drum on my 66 GMC with dana 44 leaf spring rear. Roger was correct that these are wrong even though they are listed several places. The drum I ended up using was a 1972 Chevy 4x4 drum as Solrio suggested in the same thread. The only mod that had to be done was I reamed out the lug holes with a cordless and twist bit to 9/16 to clear the lug shoulder. This took all of 5 minutes. These drums do appear much different than the stock GMC, they are finned and deeper. However these drums have a lip that actually extends over the backing plate negating the extra depth. The external cooling fins do not interfere with my stock rims. In 2016 these drums are available at auto zone, advance auto, and Napa. All 3 in my area would have to order them in w 2-3 day wait. I got mine at Napa, 2 days and 53$ each. I hope this helps to let people know that a suitable solution is widely available.
Brian