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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => Brakes and Braking Systems => Topic started by: chronos on January 03, 2010, 11:22:14 am

Title: source for 13" brake drums
Post by: chronos on January 03, 2010, 11:22:14 am

I have a 86 1/2ton 2WD 'heavy half'  five lug
with I think the bigger 13" drumsHow is the measurement made for the drums?Is it inside dia. or outside?
Maybe they are not the 13" depending on that.The shoes are 2 3/4"
Does anyone have a part number for these?
Looking for RAYBESTOS part number

Title: Re: source for 13" brake drums
Post by: VileZambonie on January 03, 2010, 12:15:18 pm

On a half ton 2wd you should have 11 5/32" x 2 3/4" shoes.

You would need to measure the drum inside diameter.

Here's the GM #s .

      11 X 2 18029648
     
      11.15 X 2.75 18029663
       
      13 X 2.50 18023341 
     
      13 X 3.50 18029651

http://www.raybestos.com/wps/portal/raybestos/c1/04_SB8K8xLLM9MSSzPy8xBz9CP0os3hnbwufEBd3D2cTk-Bg_yBjCxNjAwgAykeaxfuZ-JgYO3l5B7uaBBuaBjmZBZjA5InRbebt6W_kZ2TgbuJnYWBkahng72dqZmBpaE5AdzjItZgqjBAqwPL4XAeWx22_n0d-bqp-QW5ohEFmQDoA9oAOtA!!/dl2/d1/L2dJQSEvUUt3QS9ZQnB3LzZfTjRMNDNCSktTRTRTMTVSQjlRNDAwMDAwMDA!

Title: Re: source for 13" brake drums
Post by: VileZambonie on January 03, 2010, 12:17:17 pm

http://www.autoitoolbox.com/Raybestos/Parts.aspx

Automotive
1986 Chevrolet Truck C10 
 
Description Part Number 
Brake - Brake Shoes, Rear
[Brake Shoes]
Professional Grade;11" X 2" Brakes 449PG 
[Brake Shoes]
Professional Grade;11-5/32" X 2-3/4" Brakes 473PG 
[Brake Shoes]
Service Grade;11-5/32" X 2-3/4" Brakes 473SG
 

Title: Re: source for 13" brake drums
Post by: chronos on January 03, 2010, 02:04:25 pm

Thanks Vile , I do have the 11 x 2 3/4
The 13" drums must be HUGE....lol
Thanks for the info and numbers

Title: Re: source for 13" brake drums
Post by: malibu795 on January 03, 2010, 03:31:05 pm

find 13"x2.5 on alot of 3/4 trucks

13x3 was dually

Title: Re: source for 13" brake drums
Post by: Jim Rockford on January 08, 2010, 09:11:38 pm

try rock auto...

Title: Re: source for 13" brake drums
Post by: Flamingbig10 on January 09, 2010, 01:21:07 am

napa has them to