Looking for HD rear drum brake p/n's - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SCOTI · 03-04-2010, 02:38 AM

Anyone have a source for the part numbers breakdown on rear 1/2 ton HD brakes (73-80 Suburban)? They would be the JB6 (?) 11.15 x2.75".

BACKYARD88 · 03-04-2010, 03:03 PM

All I have is a generic illustration but I can get you part #s if you can tell me what all you need.

aggie91 · 03-04-2010, 05:17 PM

Here is what I found for a 1977 Chevrolet Suburban, 11.15 x 2.75 brakes...

Drum Brake Hardware:
Raybestos H7046
Dorman HW7046

Adjustiong Screw Assembly
Raybestos H1544 left
Dorman HW1544 left
Raybestos H1545 right
Dorman HW1545 right

Drum
Raybestos 2083R or 2083

Wheel Cylinder
Raybestos WC37048

Brake Shoes
Wagner PAB450R
Raybestos 450PG

Spring Hold Down Top Cup (part of the hardware kit)
Raybestos H1133K

Spring Hold Down Bottom Cup (part of the hardware kit)
Raybestos H1129

I do not believe that this is ALL the parts in the drawing BACKYARD88 posted. I think that it is only the replacement/rebuild parts. Items 7, 12, 14, 15 and 39 (form the drawing), I cannot find part numbers for them...I did not look real hard...

SCOTI · 03-04-2010, 05:52 PM

I surfed for hours last night looking for a breakdown like that.... I'm looking for a GM (or alternate) p/n's for part 29 & 4 (for the bore size) in that index.

aggie91 · 03-04-2010, 06:45 PM

Best I can tell the wheel cylinder has a 15/16" bore.

SCOTI · 03-04-2010, 07:28 PM

Quote:

Originally Posted by aggie91

Best I can tell the wheel cylinder has a 15/16" bore.

That's what I came up with & was trying to confirm. Now the backing plates....

BACKYARD88 · 03-05-2010, 10:38 AM

LH plate GM# 14068965
RH plate GM# 14068966
I couldn't find alternate part numbers, and I couldn't find the GM anywhere.

SCOTI · 03-05-2010, 10:40 AM

Quote:

Originally Posted by BACKYARD88

LH plate GM# 14068965
RH plate GM# 14068966
I couldn't find alternate part numbers, and I couldn't find the GM anywhere.

Figures.... Nothing is easy to find these days. Thanks for the p/n's. If I might inquire, where did you source them from?

BACKYARD88 · 03-07-2010, 04:22 PM

I'm a parts guy at a GM dealer. My catalog(computer) goes back to 73 and I have a paper catalog for 47-72. If there's anything I can ever help you find just let me know and I'll give it my best shot.

SCOTI · 03-07-2010, 06:53 PM

Quote:

Originally Posted by BACKYARD88

I'm a parts guy at a GM dealer. My catalog(computer) goes back to 73 and I have a paper catalog for 47-72. If there's anything I can ever help you find just let me know and I'll give it my best shot.

I used to have a guy here in Dallas that helped research my old stuff for me. He was @ Young Chevrolet in Dallas back in the late 80's & early 90's then moved to the Rockwall dealership (Lakeside Chevrolet). I got stuff from him a couple of times after he moved to Rockwall but have since lost touch w/him.

I'm stashing your contact info

.

03-04-2010, 02:38 AM	#1
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,068	Looking for HD rear drum brake p/n's Anyone have a source for the part numbers breakdown on rear 1/2 ton HD brakes (73-80 Suburban)? They would be the JB6 (?) 11.15 x2.75". __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

03-04-2010, 03:03 PM	#2
BACKYARD88 On the fast track to nowhere.. Join Date: May 2006 Location: Splendora, Texas Posts: 5,316	Re: Looking for HD rear drum brake p/n's All I have is a generic illustration but I can get you part #s if you can tell me what all you need. __________________ -Mike Owen- Support the board here! 71 Chevy short fleet build thread Double D Norwood, Houston, Cecilia, Jackson, Monroe and counting

03-04-2010, 05:17 PM	#3
aggie91 I'm just glad to be here! Join Date: Jan 2008 Location: Longview, TX Posts: 4,788	Re: Looking for HD rear drum brake p/n's Here is what I found for a 1977 Chevrolet Suburban, 11.15 x 2.75 brakes... Drum Brake Hardware: Raybestos H7046 Dorman HW7046 Adjustiong Screw Assembly Raybestos H1544 left Dorman HW1544 left Raybestos H1545 right Dorman HW1545 right Drum Raybestos 2083R or 2083 Wheel Cylinder Raybestos WC37048 Brake Shoes Wagner PAB450R Raybestos 450PG Spring Hold Down Top Cup (part of the hardware kit) Raybestos H1133K Spring Hold Down Bottom Cup (part of the hardware kit) Raybestos H1129 I do not believe that this is ALL the parts in the drawing BACKYARD88 posted. I think that it is only the replacement/rebuild parts. Items 7, 12, 14, 15 and 39 (form the drawing), I cannot find part numbers for them...I did not look real hard... __________________ 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

03-04-2010, 05:52 PM	#4
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,068	Re: Looking for HD rear drum brake p/n's I surfed for hours last night looking for a breakdown like that.... I'm looking for a GM (or alternate) p/n's for part 29 & 4 (for the bore size) in that index. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.* Last edited by SCOTI; 03-04-2010 at 05:53 PM.

03-04-2010, 06:45 PM	#5
aggie91 I'm just glad to be here! Join Date: Jan 2008 Location: Longview, TX Posts: 4,788	Re: Looking for HD rear drum brake p/n's Best I can tell the wheel cylinder has a 15/16" bore. __________________ 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

03-05-2010, 10:38 AM	#7
BACKYARD88 On the fast track to nowhere.. Join Date: May 2006 Location: Splendora, Texas Posts: 5,316	Re: Looking for HD rear drum brake p/n's LH plate GM# 14068965 RH plate GM# 14068966 I couldn't find alternate part numbers, and I couldn't find the GM anywhere. __________________ -Mike Owen- Support the board here! 71 Chevy short fleet build thread Double D Norwood, Houston, Cecilia, Jackson, Monroe and counting

03-07-2010, 04:22 PM	#9
BACKYARD88 On the fast track to nowhere.. Join Date: May 2006 Location: Splendora, Texas Posts: 5,316	Re: Looking for HD rear drum brake p/n's I'm a parts guy at a GM dealer. My catalog(computer) goes back to 73 and I have a paper catalog for 47-72. If there's anything I can ever help you find just let me know and I'll give it my best shot. __________________ -Mike Owen- Support the board here! 71 Chevy short fleet build thread Double D Norwood, Houston, Cecilia, Jackson, Monroe and counting



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