Please verify Differentals 72-3/4 4x4 - Page 3 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Old Chevy Mech · 10-13-2007, 08:46 PM

Hello,
Started working on my 70 C-20 4X4 rear end. She only has 113K miles but the rear drums Look shot. From what I've read in this thread it looks hopeful that I can get new drums for her?

Has anyone recently procured drums for this particular rear with 12" X 2" drums?

I checked out this site and they claim to have them, pretty pricy but if its the only source then I guess I am gonna pay! LOL

http://brakeperformance.com/site/brake_drums.php

I only pulled the one side but it seems that they removed the E-Brake parts!

I tried posting in the forsale section as it looked like one could post a WTB thread, but it wouldnt allow me to.

I'd like to get a pair of drums and the E-Brake parts if anyone has them for sale or sitting around after switching to Disk brakes.

Thanks for any help anyone can give.

Frank

pumpkin · 10-15-2007, 03:28 PM

From what lmitted info I can find I believe that is an HO72. It has a bushing that sits opposite the pinion to prevent ring gear deflection. The HO52's do not have this bushing, but are othwise the same. As far as getting a detroit locker, the 14 bolt locker bolts in, you just have to use the 14 bolt axles. I have one in my 72 Blazer, and after a bit o trimming, I gained half an inch of ground clearance over the 12 bolt

va_tlc · 10-15-2007, 10:23 PM

remember after you take the drums off and that gear oil that runs out the axel hub... after you finish yr brake job you should tilt the rear end from side to side on a hill, to put that oil back out there to keep from burning up yr bearings

67mater · 10-16-2007, 05:49 PM

Man oh man; this is the info I've been lookign for!!! This is the exact axle I have and I just couldn't figure out what it was. My brotehr said it was a 1 ton but I couldn't find it! It's massive too so I didn't think it was just a GM 10 bolt. Great to hear the good and bacd, and my manual brakes are like a bench press; so it's good to know what I'm in for. Also, I belive mine is a locker; how rare is that?

Old Chevy Mech · 10-29-2007, 12:15 AM

Just got 2 brand new 12" x 2" drums for my HO52 from http://brakeperformance.com/site/brake_drums.php

Just an FYI in case anyone with a 3/4 ton 4 x 4 is interested in keeping their HO52 as original as possible.

Frank

va_tlc · 10-29-2007, 10:08 PM

i check that site and it looks to me it only list 2 wd models? hopefully i overlooked something, anyone needed backing plates or axels for a ho52 i have a ad in the 4 sale for them,thanks

10-13-2007, 08:46 PM	#51
Old Chevy Mech Keepin it runnin! Join Date: Oct 2007 Location: Deep River, CT Posts: 1,036	Re: Please verify Differentals 72-3/4 4x4 Hello, Started working on my 70 C-20 4X4 rear end. She only has 113K miles but the rear drums Look shot. From what I've read in this thread it looks hopeful that I can get new drums for her? Has anyone recently procured drums for this particular rear with 12" X 2" drums? I checked out this site and they claim to have them, pretty pricy but if its the only source then I guess I am gonna pay! LOL http://brakeperformance.com/site/brake_drums.php I only pulled the one side but it seems that they removed the E-Brake parts! I tried posting in the forsale section as it looked like one could post a WTB thread, but it wouldnt allow me to. I'd like to get a pair of drums and the E-Brake parts if anyone has them for sale or sitting around after switching to Disk brakes. Thanks for any help anyone can give. Frank __________________ 1970 K-5 4X4 Blazer 1970 K-20 4X4 Long Bed "Liberty Means Responsibility, that is why most men dread it" Last edited by Old Chevy Mech; 10-13-2007 at 10:13 PM. Reason: Adding content

10-15-2007, 03:28 PM	#52
pumpkin Registered User Join Date: Apr 2006 Location: East Sooke B.C. Canada Posts: 543	Re: Please verify Differentals 72-3/4 4x4 From what lmitted info I can find I believe that is an HO72. It has a bushing that sits opposite the pinion to prevent ring gear deflection. The HO52's do not have this bushing, but are othwise the same. As far as getting a detroit locker, the 14 bolt locker bolts in, you just have to use the 14 bolt axles. I have one in my 72 Blazer, and after a bit o trimming, I gained half an inch of ground clearance over the 12 bolt

10-15-2007, 10:23 PM	#53
va_tlc Registered User Join Date: Nov 2005 Location: VIRGINIA Posts: 905	Re: Please verify Differentals 72-3/4 4x4 remember after you take the drums off and that gear oil that runs out the axel hub... after you finish yr brake job you should tilt the rear end from side to side on a hill, to put that oil back out there to keep from burning up yr bearings __________________ 1969 rs 1966fastback 1969swbc/10 2006gt 1972swb4x4

10-16-2007, 05:49 PM	#54
67mater Registered User Join Date: Sep 2007 Location: Mundelein, IL Posts: 862	Re: Please verify Differentals 72-3/4 4x4 Man oh man; this is the info I've been lookign for!!! This is the exact axle I have and I just couldn't figure out what it was. My brotehr said it was a 1 ton but I couldn't find it! It's massive too so I didn't think it was just a GM 10 bolt. Great to hear the good and bacd, and my manual brakes are like a bench press; so it's good to know what I'm in for. Also, I belive mine is a locker; how rare is that? __________________ time is inversely proportional to money; that's why it takes me so long 1967 K10 1967 Camaro

10-29-2007, 12:15 AM	#55
Old Chevy Mech Keepin it runnin! Join Date: Oct 2007 Location: Deep River, CT Posts: 1,036	Re: Please verify Differentals 72-3/4 4x4 Just got 2 brand new 12" x 2" drums for my HO52 from http://brakeperformance.com/site/brake_drums.php Just an FYI in case anyone with a 3/4 ton 4 x 4 is interested in keeping their HO52 as original as possible. Frank __________________ 1970 K-5 4X4 Blazer 1970 K-20 4X4 Long Bed "Liberty Means Responsibility, that is why most men dread it"

10-29-2007, 10:08 PM	#56
va_tlc Registered User Join Date: Nov 2005 Location: VIRGINIA Posts: 905	Re: Please verify Differentals 72-3/4 4x4 i check that site and it looks to me it only list 2 wd models? hopefully i overlooked something, anyone needed backing plates or axels for a ho52 i have a ad in the 4 sale for them,thanks __________________ 1969 rs 1966fastback 1969swbc/10 2006gt 1972swb4x4



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