| Asbestos shoes for the rear? [message #86066] |
Tue, 25 May 2010 18:43  |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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I picked up a set of OEM asbestos shoes about a week ago from the estate of a former GMC'r. What are you all thinking about the effectiveness of the asbestos shoes?
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: Asbestos shoes for the rear? [message #86070 is a reply to message #86066] |
Tue, 25 May 2010 18:53  |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
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Kind of like asbestos for fire control, it worked very well (just you didn't want to inhale the dust from it). I think that the automotive industry is still searching for a good alternative. All the metallic and ceramic pads work well, but they do wear the rotors much more. Then again, it could be the thinner rotors and cheaper steel that is being used these days.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: Asbestos shoes for the rear? [message #86073 is a reply to message #86066] |
Tue, 25 May 2010 19:03 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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If I had a choice of brake shoes it would be the asbestos ones hands down. There is a good reason they supplied them on police cars when the average Joe could only get store bought junk. Some time ago Cinnabar bought up a bunch of Police Interceptor shoes and were selling them. I bought 2 sets and they did make a difference.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Asbestos shoes for the rear? [message #86079 is a reply to message #86070] |
Tue, 25 May 2010 19:57 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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George,
Double Trouble has Caddy calipers on the front and middle wheels (rears are
drums - NJ registration required a manual emergency brake). When I rebuilt
the system I installed carbon metallic pads in the calipers. I also
installed new OEM disks on the front. I did so at the recommendation of Dave
Lenzi. He advised that he had installed them on his coach and measured the
disk thickness. Eighty thousand miles later he re-measured them and found
negligible wear. He noted that the carbon metallic pads transfer material
from the pads to the disks which slows down the rate of wear. HOWEVER, he
noted that it was imperative that the disks were either brand new or sanded
to open up the pores in the cast iron for that transfer to occur.
I agree that the disks on vehicles currently leave a bit to be desired. I
have a 2002 Mazda Tribute here in Australia and when I took it in for the
40,000 km service (25,000 miles) I was advised that the disks were worn
beyond limits. I looked them and noted they had some grooves in them. They
wanted $285 per disk for new ones. The service writer told me that this was
quite common and that it was because they used "formula one technology
disks" to make the car stop quicker! I gave him a don't give me that BS look
and he followed that with "we can't do it but if you buy some new pads and
put them in and bed them carefully the disks will last another 20,000km."
That's what I did and at 60,000km I replaced the disks and pads. I got
aftermarket disks for $160!
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: George Rudawsky
All the metallic and ceramic pads work well, but they do wear the rotors
much more. Then again, it could be the thinner rotors and cheaper steel
that is being used these days.
--
George Rudawsky
Chicago, IL
75 Palm Beach
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: Asbestos shoes for the rear? [message #86083 is a reply to message #86066] |
Tue, 25 May 2010 20:50 |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
Karma: 3
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Larry,
I have been buying asbestos shoes for my GMC for several years from a brake shop in National City, Ca. Around $50 a set. Somewhat less than converting to rear disks.
They work much better than the non asbestos Autozone shoes that I used previously.
In addition to the asbestos the key is to keep the drum brakes properly adjusted.
You'd think that if a small independent brake shop still has a re-builder source for asbestos linings that others could also supply them. But I've asked at parts houses and they say "We can't get those anymore."
Perhaps there is just not enough demand, or the shops don't want to service them due to the danger of asbestos.
Let us know how you like them.
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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| Re: Asbestos shoes for the rear? [message #86173 is a reply to message #86148] |
Wed, 26 May 2010 14:18 |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
Karma: 3
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The asbestos linings are much softer than the carbon metalic; they produce more friction and therefore better braking.
But because they are softer they wear out faster; but they don't wear the drums as much.
Hope Larry gets his installed and gives us an update soon.
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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| Re: [GMCnet] Asbestos shoes for the rear? [message #86183 is a reply to message #86125] |
Wed, 26 May 2010 15:30 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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Steve :
Don't know personally I just know Wes Cogland of Cinnabar fame said the were made specially for police cars. It was part of the recommended brake upgrade we did around the early 1990's that Jim Annocet came up with. You know 80 mm calipers and asbestos shoes in the rear Carbon Friction Pads up front.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Asbestos shoes for the rear? [message #86184 is a reply to message #86180] |
Wed, 26 May 2010 15:39 |
Dave Mumert
Messages: 272
Registered: February 2004
Location: Olds, AB, Canada
Karma: 0
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Ha All
Porterfield brakes makes pads and shoes that fit the GMC. I'm not sure if
all years used the same shoes but the later models use (I believe) a
Shoe462. This is the same as the 96-99 Dodge Ram 1500. The Porterfield R4S
shoes have a friction of .41. They have the 052 pads in R4S material as
well.
Dave
> -----Original Message-----
> Sent: Wednesday, May 26, 2010 1:54 PM
> Subject: Re: [GMCnet] Asbestos shoes for the rear?
>
> gbarrow wrote on Wed, 26 May 2010 14:18
> > The asbestos linings are much softer than the carbon metalic; they
produce
> more friction and therefore better braking.
> >
> > But because they are softer they wear out faster; but they don't wear
the
> drums as much.
> >
> > Hope Larry gets his installed and gives us an update soon.
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| Re: [GMCnet] Asbestos shoes for the rear? [message #86195 is a reply to message #86183] |
Wed, 26 May 2010 17:25 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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I checked my back issues of GMC Motor home News. December 1994 issue #2 says brake shoes with asbestos lining was reissued for Police car use on "B" body type cars the GM part # is 12510031. These same shoes fit our coaches. Some time later they were discontinued.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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