67 front drums not budging - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Furno68C20** · 05-07-2020, 12:15 AM

We’ve all banged on drums to get loose but I have to tell you the front drums on my 67 c10 will not break loose. The truck has been sitting 10 plus years. The rears took a few hits but came off ok. Just not sure why the fronts are so tough.

The drums rotate fine on both front sides. There is a large spring that is wrapped around the drum. Does that need to come off? Is there something else holding it on? I’ve hit it with Kroil, wd40! And even heat and no budge.

Any tricks out there ?

I’m using a good old school wire brush and a sludge hammer.
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**FirstOwner69** · 05-07-2020, 12:39 AM

It looks like your hub may be riveted to the drum. Try taking it off as an assembly.

palallin · 05-07-2020, 07:57 AM

Yep, the rivets are still there. Gotta pull the spindle nut and the outer bearing. Once off and cleaned up, grind or drill the rivets out to avoid the problem (and enable turning the drum, if needed).

I never could figure out why GM assembled them that way.

**too much stuff** · 05-07-2020, 08:26 AM

Quote:

Originally Posted by palallin

Yep, the rivets are still there. Gotta pull the spindle nut and the outer bearing. Once off and cleaned up, grind or drill the rivets out to avoid the problem (and enable turning the drum, if needed).

I never could figure out why GM assembled them that way.

This is your answer...all 1 assembly.

**TBONE1964** · 05-07-2020, 09:20 AM

You will want to leave the hub riveted to the drum if possible.

You will get a better result machining the drum as an assemble.

Using the bearing raced as a pilot for the drum lathe will work much better than using the center hole in the drum as a pilot. Think run out.

Unless your drums are wore beyond min spec and then you would have to de rivet. I would make sure you use machine with both the hub and the drum assembled.

Hope this helps

**Furno68C20** · 05-07-2020, 09:21 AM

Quote:

Originally Posted by palallin

Yep, the rivets are still there. Gotta pull the spindle nut and the outer bearing. Once off and cleaned up, grind or drill the rivets out to avoid the problem (and enable turning the drum, if needed).

I never could figure out why GM assembled them that way.

Ok. Never ran into this before. The truck is original. Do the rivets have to be re-installed for this type of assembly?
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**bigmac73** · 05-07-2020, 09:31 AM

I am curious if that spring is there for anti vibration?? I had a 69 C10 30 some years ago , do not remember that spring

**TBONE1964** · 05-07-2020, 09:40 AM

Quote:

Originally Posted by bigmac73

I am curious if that spring is there for anti vibration?? I had a 69 C10 30 some years ago , do not remember that spring

The spring prevents harmonic noise. Nothing to do with balance.

**bigmac73** · 05-07-2020, 10:05 AM

make sense thanks

mikeshome · 05-07-2020, 11:24 AM

You dont need to replace the rivets ,You wont find many around that are still there,

05-07-2020, 12:15 AM	#1
Furno68C20 Senior Member Join Date: Mar 2019 Location: Somonauk IL Posts: 324	67 front drums not budging We’ve all banged on drums to get loose but I have to tell you the front drums on my 67 c10 will not break loose. The truck has been sitting 10 plus years. The rears took a few hits but came off ok. Just not sure why the fronts are so tough. The drums rotate fine on both front sides. There is a large spring that is wrapped around the drum. Does that need to come off? Is there something else holding it on? I’ve hit it with Kroil, wd40! And even heat and no budge. Any tricks out there ? I’m using a good old school wire brush and a sludge hammer. Posted via Mobile Device Attached Images

05-07-2020, 12:39 AM	#2
FirstOwner69 Senior Member Join Date: May 2010 Location: Wisconsin & Arizona Posts: 4,843	Re: 67 front drums not budging It looks like your hub may be riveted to the drum. Try taking it off as an assembly. __________________ Jim

05-07-2020, 07:57 AM	#3
palallin Registered User Join Date: Jul 2002 Location: St. James, MO Posts: 1,239	Re: 67 front drums not budging Yep, the rivets are still there. Gotta pull the spindle nut and the outer bearing. Once off and cleaned up, grind or drill the rivets out to avoid the problem (and enable turning the drum, if needed). I never could figure out why GM assembled them that way. __________________ '69 Longstep K-10: 327/SM465/T-221/Closed Knuckle Dana44/12-bolt.

05-07-2020, 09:20 AM	#5
TBONE1964 Cluster King Join Date: Nov 2012 Location: Junction City, OR Posts: 5,263	Re: 67 front drums not budging You will want to leave the hub riveted to the drum if possible. You will get a better result machining the drum as an assemble. Using the bearing raced as a pilot for the drum lathe will work much better than using the center hole in the drum as a pilot. Think run out. Unless your drums are wore beyond min spec and then you would have to de rivet. I would make sure you use machine with both the hub and the drum assembled. Hope this helps __________________ Contact me on all of your gauge cluster needs. I specialize in restoration, repair and parts sales for 67-72 Chevy and GMC trucks. email me at tbonegarris@yahoo.com I am also a dealer for Counterpart for gauge cluster parts only. Also see my facebook page, CG&C

05-07-2020, 09:31 AM	#7
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: 67 front drums not budging I am curious if that spring is there for anti vibration?? I had a 69 C10 30 some years ago , do not remember that spring __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

05-07-2020, 10:05 AM	#9
bigmac73 Senior Member Join Date: Mar 2012 Location: Chesapeake, Va Posts: 1,275	Re: 67 front drums not budging make sense thanks __________________ Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks

05-07-2020, 11:24 AM	#10
mikeshome Registered User Join Date: Jul 2013 Location: Mount Albert.Ontario Posts: 119	Re: 67 front drums not budging You dont need to replace the rivets ,You wont find many around that are still there,



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