Will 69 C10 brake backing plates bolt onto a 72 C10 rear axle? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**WIDESIDE72** · 11-10-2013, 03:54 PM

I have a 72 5 lug rear axle for sale. It does not have backing plates. I have a potential buyer thathas a 69 with recently refurbished brakes. Has anyone done this swap?

I am going to go out and measure the mounting bolt dimensions on my other 72 C10 and have hime do the same as the loose parts I have are out at my storage place and i wont have time to go out there til Thurs.

hugger6933 · 11-10-2013, 06:45 PM

I think the plates are the same,but don't make a deal on my word being the final word. If I am correct there will be someone back me up on this and if I am wrong I'm sure somebody will scold me for sure. Jim

old Chevy guy · 11-11-2013, 12:42 PM

I tried to look up backing plates on a few websites to see if they cross but couldn't find any listed, BUT the brake shoes hardware and wheel cylinders all list the same 67-72 c 10. Still no guarantee they bolt on the tube the same.

cdowns · 11-11-2013, 01:06 PM

i seem to think that 71 72 had two different types of backing plates one regular and the heavy duty ones that were wider and required a different backin plate

**WIDESIDE72** · 11-11-2013, 01:27 PM

I did find that the hardware for the two years is the same. Two different brake shoe sizes are listed for 72, 11"x2" and 11-3/8"x 2-3/4" (IIRC). I cant see that the mounting flange for the backing plate being different though. I am leaning toward the backing plates interchanging.

luvbowties · 11-15-2013, 05:36 PM

Since '72 plates will bolt onto a '66 diff'l (using approx. 3/8" spacers with '72 axles), I'd THINK they will also bolt onto all years in between. I AM THINKING, AS OTHER POSTERS ARE ALSO DOING, as just the first phrase, "'72 plates will bolt onto a '66"--is KNOWN to me.
Sam

**WIDESIDE72** · 11-15-2013, 07:33 PM

Yesterday was my first day off and i measured the 72 rear axle mounting pattern and the same on a 6 lug rear i have. They are the same. Only possible variable would be the center hole. My axle has backing plates so worse case woild be swapping shoes and adjusters etc from 69 axle to 72 axle.

Thanks everyone for the input.

11-10-2013, 03:54 PM	#1
WIDESIDE72 Senior Member Join Date: Aug 2008 Location: Cedar Park, Texas Posts: 7,500	Will 69 C10 brake backing plates bolt onto a 72 C10 rear axle? I have a 72 5 lug rear axle for sale. It does not have backing plates. I have a potential buyer thathas a 69 with recently refurbished brakes. Has anyone done this swap? I am going to go out and measure the mounting bolt dimensions on my other 72 C10 and have hime do the same as the loose parts I have are out at my storage place and i wont have time to go out there til Thurs.

11-10-2013, 06:45 PM	#2
hugger6933 Registered User Join Date: Oct 2008 Location: Marianna Arkansas Posts: 7,280	Re: Will 69 C10 brake backing plates bolt onto a 72 C10 rear axle? I think the plates are the same,but don't make a deal on my word being the final word. If I am correct there will be someone back me up on this and if I am wrong I'm sure somebody will scold me for sure. Jim

11-11-2013, 12:42 PM	#3
old Chevy guy Registered User Join Date: Apr 2007 Location: Foster Rhode Island Posts: 1,176	Re: Will 69 C10 brake backing plates bolt onto a 72 C10 rear axle? I tried to look up backing plates on a few websites to see if they cross but couldn't find any listed, BUT the brake shoes hardware and wheel cylinders all list the same 67-72 c 10. Still no guarantee they bolt on the tube the same.

11-11-2013, 01:06 PM	#4
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Will 69 C10 brake backing plates bolt onto a 72 C10 rear axle? i seem to think that 71 72 had two different types of backing plates one regular and the heavy duty ones that were wider and required a different backin plate __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

11-11-2013, 01:27 PM	#5
WIDESIDE72 Senior Member Join Date: Aug 2008 Location: Cedar Park, Texas Posts: 7,500	Re: Will 69 C10 brake backing plates bolt onto a 72 C10 rear axle? I did find that the hardware for the two years is the same. Two different brake shoe sizes are listed for 72, 11"x2" and 11-3/8"x 2-3/4" (IIRC). I cant see that the mounting flange for the backing plate being different though. I am leaning toward the backing plates interchanging.

11-15-2013, 05:36 PM	#6
luvbowties Registered User Join Date: Feb 2009 Location: southeasternfoothillsofusa Posts: 1,557	Re: Will 69 C10 brake backing plates bolt onto a 72 C10 rear axle? Since '72 plates will bolt onto a '66 diff'l (using approx. 3/8" spacers with '72 axles), I'd THINK they will also bolt onto all years in between. I AM THINKING, AS OTHER POSTERS ARE ALSO DOING, as just the first phrase, "'72 plates will bolt onto a '66"--is KNOWN to me. Sam

11-15-2013, 07:33 PM	#7
WIDESIDE72 Senior Member Join Date: Aug 2008 Location: Cedar Park, Texas Posts: 7,500	Re: Will 69 C10 brake backing plates bolt onto a 72 C10 rear axle? Yesterday was my first day off and i measured the 72 rear axle mounting pattern and the same on a 6 lug rear i have. They are the same. Only possible variable would be the center hole. My axle has backing plates so worse case woild be swapping shoes and adjusters etc from 69 axle to 72 axle. Thanks everyone for the input.



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