front calipers part #'s

E

ek_lektro

New member
Jul 27, 2007
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Just a quick question, seeking part #’s for a pair of front brake calipers please.
I went down to AutoZone with parts interchange numbers and none of them matched anymore.
When searching ’78 Olds Toronado, they offered part # C132 and C133 (Durlast remanufactured)
but i’m guessing we have bigger calipers than the standard Toronado?
(but Duralast remanufactured is fine)...
Thanks much,
Greg
’76 Birchhaven (got attention in April)
May is the month for the ’78 Eleganza II :)
 
Are you replacing the stock OEM calipers? If you have moved to 16" aluminum wheels, consider replacing OEM with 80mm front calipers. Part numbers
should be in parts list. You will also have to replace the front brake hoses. Not a big deal.
Otherwise, take one of your current front calipers to the parts store and compare them to the offered Duralast rebuilds. There is a 'right side' and a
'left side', hence two different part numbers.
Note: 80mm calipers will not fit within the physical constrants of the 16" steel wheel.
Tom, MS II
--
1975 GMC Avion
KA4CSG
 
Stock would be the same as the toranado but I would do as Tom suggests and get the 80mm and carbon friction pads. If you buy the rebuilt 80mm
calipers first you shouldn't have a problem returning the old cores for credit otherwise you may have a problem getting the core return. There is a
write up doing the interchange if you go that route.
--
Roy Keen
Minden,NV
76 X Glenbrook
 
Read here
http://bdub.net/gmcmotorhome.info/brakes.html

Or just go to the one ton for your future

> Stock would be the same as the toranado but I would do as Tom suggests and
> get the 80mm and carbon friction pads. If you buy the rebuilt 80mm
> calipers first you shouldn't have a problem returning the old cores for
> credit otherwise you may have a problem getting the core return. There is a
> write up doing the interchange if you go that route.
> --
> Roy Keen
> Minden,NV
> 76 X Glenbrook
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://bdub.net/gmcmotorhome.info/
Alternator Protection Cable
http://bdub.net/gmcmotorhome.info/APC.html
 
hey thanks Thomas,
but i already bought the 2 front hoses, standard size
and was planning to just go standard with the calipers,
unless a consensus of people here chime in to tell me why 80mm are so much better for 16” aluminum wheels?…
(and are there any drawbacks?) ( i don’t see any part #s for 80mm on my older version
of the Parts Exchange (2012!) (and as i was saying before, the part #s for the standard calipers are also coming back outdated)

Either way, i need to buy these BEFORE i remove the old ones,
so i can have them in hand at the shop (in Mexico)…
So that’s why part numbers are very much needed, por favor :)

> seeking part #?s for a pair of front brake calipers please.
searching 78 Olds Toronado, they offered part # C132 and C133 (Durlast remanufactured)
but im guessing we have bigger calipers than the standard Toronado?
(but Duralast remanufactured is fine)…

PS: brake pads recommendations also appreciated :)

Thanks all, and thanks again!
Greg

> Are you replacing the stock OEM calipers? If you have moved to 16" aluminum wheels, consider replacing OEM with 80mm front calipers. Part numbers
> should be in parts list. You will also have to replace the front brake hoses. Not a big deal.
> Otherwise, take one of your current front calipers to the parts store and compare them to the offered Duralast rebuilds. There is a 'right side' and a
> 'left side', hence two different part numbers.
> Note: 80mm calipers will not fit within the physical constrants of the 16" steel wheel.
> Tom, MS II
> --
> 1975 GMC Avion
> KA4CSG
 
Gregg,

Here's a link where you can learn more about the 80mm front brake upgrade,
as well as information on other brake modifications:
http://bdub.net/gmcmotorhome.info/brakes.html

The "bottom line", is that the 80mm caliper upgrade is the simplest
modification available to improve braking significantly. It is not
necessary to replace the MC for the change, yet you'll improve the front
braking force by at least 20% vs the OEM calipers.

Now is the time to do the mod because you're going to spend approximately
the same money for OEM replacement anyway and won't have a similar
opportunity for at least 50,000 miles. Return the OEM front brake hoses
and swap them for the required "banjo end" hoses. Purchase the 80mm
calipers instead of the OEM version. And buy the same brake pads you
should use with either caliper: Performance Friction 0052.20. They're
usually available at a significant discount on eBay, etc., or at O'Reilly's
for $80.

I've done a lot of brake mods and testing over the past 19 years, and
that's JWID,

Ken H.

> hey thanks Thomas,
> but i already bought the 2 front hoses, standard size
> and was planning to just go standard with the calipers,
> unless a consensus of people here chime in to tell me why 80mm are so much
> better for 16” aluminum wheels?…
> (and are there any drawbacks?) ( i don’t see any part #s for 80mm on my
> older version
> of the Parts Exchange (2012!) (and as i was saying before, the part #s for
> the standard calipers are also coming back outdated)
>
> Either way, i need to buy these BEFORE i remove the old ones,
> so i can have them in hand at the shop (in Mexico)…
> So that’s why part numbers are very much needed, por favor :)
>
> > seeking part #?s for a pair of front brake calipers please.
> searching 78 Olds Toronado, they offered part # C132 and C133 (Durlast
> remanufactured)
> but im guessing we have bigger calipers than the standard Toronado?
> (but Duralast remanufactured is fine)…
>
> PS: brake pads recommendations also appreciated :)
>
> Thanks all, and thanks again!
> Greg
 
Update: I just found that the Parts Interchange is now offered free online
Thanks GMCMI.net :)
…and i can see that C132 C133 calipers will work fine.
(Of course my curiosity is peaked about 80mm calipers now, but might not have time :(
and i don’t see the part numbers there for them, and the hoses)

> PS: brake pads recommendations also appreciated :)

metallic vs. semi metallic.? ceramic? heavy duty?... i’m not sure what i was running already.
Auto Zone http://www.autozone.com/ 0052-20.. Everybody reasonably happy with these?

thanks, and cheers!
Greg
 
The Autozone part numbers for the 80 mm calipers are C530 and C531. They are currently listed on Autozone’ s site for $18.99 each.

They have a core charge but many have turned in the original GMC calipers for the core and they have been accepted just fine.

You will need the banjo hoses which are left: 77320 and right 77421.

You have to grind a little on the castings of the calipers so that they clear some bolts on the ball joints.

Emery Stora
77 Kingsley
Frederick, CO

>
> Update: I just found that the Parts Interchange is now offered free online
> Thanks GMCMI.net :)
> …and i can see that C132 C133 calipers will work fine.
> (Of course my curiosity is peaked about 80mm calipers now, but might not have time :(
> and i don’t see the part numbers there for them, and the hoses)
>
>> PS: brake pads recommendations also appreciated :)
>
>
> metallic vs. semi metallic.? ceramic? heavy duty?... i’m not sure what i was running already.
> Auto Zone http://www.autozone.com/ 0052-20.. Everybody reasonably happy with these?
>
> thanks, and cheers!
> Greg
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Thanks Ken and Emery for the explanations and the part numbers.
I just returned the OEM stuff and got most everything needed for the mod
at AutoZone today
courtesy of the link
http://bdub.net/gmcmotorhome.info/brakes.html

regarding the loose ends:
2 ea jam nut (don't have AutoZone number for this)
2 ea bolt and nut, ss, ¼ x 1" (not an AutoZone item)

i’m assuming that the “jam nut” is for the 1/4 x 1” bolt?
and that “ss” stands for Stainless steel?

thanks again, and cheers
Greg
 
Good choice I did the same you just have to grind a little bit of the casting and get creative with the hose routing but you'll be glad you decided on
the upgrade.
--
Tony Cook
77' Kingsley ' SuperSession 77 '
Torrance Beach,CA
 
You will have to slightly bend the hoses. Bend slowly and carefully. Good time to take a look at your CV boots.
Tom, MS II
--
1975 GMC Avion
KA4CSG
 
This is how you install the 80MM calipers on your coach on the front.

http://www.gmcmotorhome.com/commodore/front_brake/index.html

JR Wright
GMC Great Laker MHC
GMC Eastern States Charter Member
GMCGL Tech Editor
GMCMI
78 GMC Buskirk 30’ Stretch
1975 GMC Avion (Under Reconstruction)
Michigan

>
> You will have to slightly bend the hoses. Bend slowly and carefully. Good time to take a look at your CV boots.
> Tom, MS II
> --
> 1975 GMC Avion
> KA4CSG
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Fantastic out-pouring of info from everybody, thanks again;
and thanks to Tom Phipps for being the first one to advise me
to consider the upgrade (when i was just looking for OEM part numbers)!
I think i’m set to go on this job (we'll start in about a week).

> This is how you install the 80MM calipers on your coach on the front.
> http://www.gmcmotorhome.com/commodore/front_brake/index.html http://www.gmcmotorhome.com/commodore/front_brake/index.html
(Now to figure out what to do about this radiator…. LOL)
cheers,
Greg
 
Take the time to put a coat or two of hi temp caliper paint on the calipers after grinding off the casting nub. Also put a few careful wraps of
teflon tape on the bleeder screws. You will thank yourself in a few years when you need to bleed the brakes again.

--
77 Royale, Rear Dry Bath. 403, 3.55 Final Drive, Lenzi goodies, Patterson carb and dizzy.
Mid Michigan
 
Now what’s wrong with the radiator?

JRWright

>
> Fantastic out-pouring of info from everybody, thanks again;
> and thanks to Tom Phipps for being the first one to advise me
> to consider the upgrade (when i was just looking for OEM part numbers)!
> I think i’m set to go on this job (we'll start in about a week).
>
>> This is how you install the 80MM calipers on your coach on the front.
>> http://www.gmcmotorhome.com/commodore/front_brake/index.html http://www.gmcmotorhome.com/commodore/front_brake/index.html
> (Now to figure out what to do about this radiator…. LOL)
> cheers,
> Greg
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
If you purchased carbon metallic brake pads it is important to sand the
disks to open the pores in the cast iron. The carbon metallic pads will
transfer material from the pads to the disks which will extend the life of
the disks.

I was talking with Dave Lenzi about this at the Shawnee Convention and he
told me what grit paper he uses, unfortunately that was last month and I've
forgotten!

Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808

-----Original Message-----
From: Gmclist [mailto:gmclist-bounces] On Behalf Of
Ek_Lektro

Fantastic out-pouring of info from everybody, thanks again;
and thanks to Tom Phipps for being the first one to advise me
to consider the upgrade (when i was just looking for OEM part numbers)!
I think i'm set to go on this job (we'll start in about a week).
 
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