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AMC20 Drum Brake Parts |
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401MATCOUPE 
AMC Addicted 
Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5367 |
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 Posted: Sep/17/2015 at 8:16am |
A 10 x 2.5" brake drum would not be "original" on a 70 AMX. Some Ambassador and Matadors came with 2.5" wide rear shoes/drums, but that would be mostly Fleet and Wagons. You can not just swap in a wider drum, FYI, it requires backing plates to match the 2.5" wide shoe. The 1 3/4" wide drums are readily available from Rockauto.com in Centric Brand at very reasonable prices, they just don't have the three little 1/4" diameter holes to hole the drum in place when the wheel is removed...but that does not effect the function or ultimate fit. Hope this helps. |
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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frumpygucker
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Joined: Aug/10/2015 Location: london Status: Offline Points: 6 |
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Posted: Sep/18/2015 at 4:00am |
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Thanks for that.
I will be swapping the whole of the rear brake assembly. I still have to find out if 71 and up Ambassadors and Matadors had 2.5" rear drums as standard or if it was a towing option. If I can find them from a parting car I will snap them up, who knows I might get an AMX that slows down, maybe even stops! |
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401MATCOUPE
AMC Addicted
Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5367 |
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Posted: Sep/18/2015 at 8:00am |
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I thought I answered your question but maybe just caused more confusion. 2.5" drums were NOT standard on any US built 71 up AMC Passenger cars (see possible except below). They were a Fleet/Taxi/Heavy Duty Option on only the Big Body cars such as Ambassador and Rebel. I have seen some documentation that shows 2.5" was standard on Station Wagon's but I have never parted one down.
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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frumpygucker
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Joined: Aug/10/2015 Location: london Status: Offline Points: 6 |
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Posted: Sep/18/2015 at 8:03am |
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Many Thanks.
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frumpygucker
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Joined: Aug/10/2015 Location: london Status: Offline Points: 6 |
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Posted: Oct/28/2015 at 8:08am |
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Hi
A while back you were able to help somebody out with info and parts. Part 5, do you call that the brake bar? I need a couple for the rear drum assemblies from a 73 Ambassador Wagon. I appear to have shrunk... Anyway, the drums are 10" x 2.5". Do you have a couple of these, or can you tell me where to find them? Cheers
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klvn8r
AMC Apprentice 
Joined: Feb/26/2012 Location: Texas Status: Offline Points: 160 |
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Posted: Nov/24/2015 at 6:37pm |
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I'd be curious about this too, from a racing point of view. Some bigger drums out back would draw alot less attention than a set of discs....
klvn8r |
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frumpygucker
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Joined: Aug/10/2015 Location: london Status: Offline Points: 6 |
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Posted: Nov/24/2015 at 11:06pm |
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Hi
I found them! I you drop me a line at aamarler@hotmail.com I will pass all my information over....
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kenoshakicker
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Joined: Feb/14/2015 Location: PA Status: Offline Points: 525 |
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Posted: Nov/27/2015 at 8:42pm |
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[/QUOTE] The 1 3/4" wide drums are readily available from Rockauto.com in Centric Brand at very reasonable prices, they just don't have the three little 1/4" diameter holes to hole the drum in place when the wheel is removed...but that does not effect the function or ultimate fit. Hope this helps. [/QUOTE] I was on Rockauto.com and I looked for the drums using the part number listed here in this thread for the AMC 20 rear. They come up as not available. I called Rock for help and they were not helpful at all. I have had a few problems recently with buying parts over the net and want to be sure before I order anything from them. These numbers, I think, will fit for my car, a 1973 Javelin, P code with the AMC20. Drums...Pronto #BD80012 or Centric 12367024 Wheel cylinders...#W17508 and W17507 Has anyone used either of these drums or cylinders on a Javelin AMC20? Thanks for your help. Edited by kenoshakicker - Nov/27/2015 at 8:45pm |
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frumpygucker wrote: