P3500 Dually rear drum brakes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lefty7845 · 11-11-2018, 03:26 PM

I need help. My 81 GMC P3500 was built with a drive shaft emergency brake. I would like to install the emergency brake on the rear end. Finding backing plates with holes for emergency brake cables has been fruitless. I have heard that C30 backing plates should fit. Wondering if anyone would know for sure?
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**kwmech** · 11-16-2018, 11:20 PM

Dana 70 and 14 bolt more than often take the same brakes. So it would depend on which rear you have

lefty7845 · 11-17-2018, 08:33 AM

Quote:

Originally Posted by kwmech

Dana 70 and 14 bolt more than often take the same brakes. So it would depend on which rear you have

I think my rear end is 10 bolt
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**mongocanfly** · 11-17-2018, 09:01 AM

Shouldnt be a 10b in a 3500....unless somebody swapped it in...can you get a pic of axle And diff cover?...how many lug bolts does it have?

lefty7845 · 11-17-2018, 09:25 AM

Quote:

Originally Posted by mongocanfly

Shouldnt be a 10b in a 3500....unless somebody swapped it in...can you get a pic of axle And diff cover?...how many lug bolts does it have?

I have 10 bolt with 8 lug wheels, will take a pic when I get home
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lefty7845 · 11-17-2018, 10:37 AM

Quote:

Originally Posted by lefty7845

I have 10 bolt with 8 lug wheels, will take a pic when I get home
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lefty7845 · 11-17-2018, 10:39 AM

Quote:

Originally Posted by lefty7845

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lefty7845 · 11-17-2018, 10:56 AM

I have add the pics.

lefty7845 · 12-01-2018, 02:13 PM

11

11-11-2018, 03:26 PM	#1
lefty7845 Registered User Join Date: Nov 2018 Location: Owensboro, KY Posts: 8	P3500 Dually rear drum brakes I need help. My 81 GMC P3500 was built with a drive shaft emergency brake. I would like to install the emergency brake on the rear end. Finding backing plates with holes for emergency brake cables has been fruitless. I have heard that C30 backing plates should fit. Wondering if anyone would know for sure? Posted via Mobile Device

11-16-2018, 11:20 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,634	Re: P3500 Dually rear drum brakes Dana 70 and 14 bolt more than often take the same brakes. So it would depend on which rear you have

11-17-2018, 09:01 AM	#4
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: P3500 Dually rear drum brakes Shouldnt be a 10b in a 3500....unless somebody swapped it in...can you get a pic of axle And diff cover?...how many lug bolts does it have? __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

11-17-2018, 10:56 AM	#8
lefty7845 Registered User Join Date: Nov 2018 Location: Owensboro, KY Posts: 8	Re: P3500 Dually rear drum brakes I have add the pics. Attached Images

12-01-2018, 02:13 PM	#9
lefty7845 Registered User Join Date: Nov 2018 Location: Owensboro, KY Posts: 8	Re: P3500 Dually rear drum brakes 11 Last edited by lefty7845; 12-01-2018 at 02:19 PM. Reason: moved to new post



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