Brake Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

alf1096 · 03-28-2006, 07:55 PM

I pulled the front rim off my 70 truck today. The po said that he took disk brakes off of a 71 suburban and put them on the truck. I went to turn the disc and it will turn by hand but you can hear the disk and the pad rubbing without the brakes appied. I am no brake expert but I dont think they should rub. How do I fix this problem. Here are some pic if you need more info let me know

thanks

rokitdude · 03-28-2006, 08:03 PM

Shouldn't be any real problem. Disc brakes are a floating design, meaning as the pads wear, they just keep moving closer to eachother. They will always lightly contact the disc, as there is no retract mechanism to pull the piston (and therefore the pads) back after you release the pedal.

It does look like you have goop or grease in there contaminating the pads though. Probably not the best situation, and pads are cheap (like $15 for the whole front end). Use OEM pads - they wont eat up your rotors like ceramics or semi-metallics.

Also, your caliper pistons look kinda corroded. Rebuilt calipers are cheap too at run-of-the-mill auto parts stores.

72armyswbtruck · 03-28-2006, 08:07 PM

Looks fine to me aswell, however if you want to be on the safe side you could check the calipers or pistons and replace them, but as long as they are stopping fine and not sqeekin then why bother at this point
Save the huge up front expense and buy one part at a time, calipers this month then next month pads, then next month rotor or whatever

72armyswbtruck · 03-28-2006, 08:08 PM

Oops sorry I just took a second look and it seems like the pads are corrodid, you might want to replace them

alf1096 · 03-28-2006, 08:13 PM

thanks for all of the quick responses....I have never replaced pads before does any one have a how to...or can give some pointers.....also is there anyway to tell what year those brakes came off of.

Tx Firefighter · 03-29-2006, 07:18 AM

Those are 71-72 brakes.

Two clues to identify them...

1) The rotors have the groove in them. They quit doing that in 73
2) The brake hose connects to a tab on the front side of the crossmember. They only did that in 71-72. In 73 and newer, the brake hoses go through holes in the framerails.

03-28-2006, 07:55 PM	#1
alf1096 Registered User Join Date: Aug 2005 Location: Texas Posts: 124	Brake Help I pulled the front rim off my 70 truck today. The po said that he took disk brakes off of a 71 suburban and put them on the truck. I went to turn the disc and it will turn by hand but you can hear the disk and the pad rubbing without the brakes appied. I am no brake expert but I dont think they should rub. How do I fix this problem. Here are some pic if you need more info let me know thanks Attached Images __________________ 1970 Short Stepside----Process of Restoring 1983 1/2 Silverado

03-28-2006, 08:03 PM	#2
rokitdude Shade-Cactus Mechanic Join Date: Mar 2006 Location: DC Posts: 31	Re: Brake Help Shouldn't be any real problem. Disc brakes are a floating design, meaning as the pads wear, they just keep moving closer to eachother. They will always lightly contact the disc, as there is no retract mechanism to pull the piston (and therefore the pads) back after you release the pedal. It does look like you have goop or grease in there contaminating the pads though. Probably not the best situation, and pads are cheap (like $15 for the whole front end). Use OEM pads - they wont eat up your rotors like ceramics or semi-metallics. Also, your caliper pistons look kinda corroded. Rebuilt calipers are cheap too at run-of-the-mill auto parts stores. Last edited by rokitdude; 03-28-2006 at 08:07 PM.

03-28-2006, 08:07 PM	#3
72armyswbtruck Registered User Join Date: Feb 2004 Location: Idaho Posts: 4,033	Re: Brake Help Looks fine to me aswell, however if you want to be on the safe side you could check the calipers or pistons and replace them, but as long as they are stopping fine and not sqeekin then why bother at this point Save the huge up front expense and buy one part at a time, calipers this month then next month pads, then next month rotor or whatever __________________ "Remember, They can Kill You, but they can't eat You, That's against the law!!!!!!!!!"

03-28-2006, 08:08 PM	#4
72armyswbtruck Registered User Join Date: Feb 2004 Location: Idaho Posts: 4,033	Re: Brake Help Oops sorry I just took a second look and it seems like the pads are corrodid, you might want to replace them __________________ "Remember, They can Kill You, but they can't eat You, That's against the law!!!!!!!!!"

03-28-2006, 08:13 PM	#5
alf1096 Registered User Join Date: Aug 2005 Location: Texas Posts: 124	Re: Brake Help thanks for all of the quick responses....I have never replaced pads before does any one have a how to...or can give some pointers.....also is there anyway to tell what year those brakes came off of. __________________ 1970 Short Stepside----Process of Restoring 1983 1/2 Silverado

03-29-2006, 07:18 AM	#6
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Brake Help Those are 71-72 brakes. Two clues to identify them... 1) The rotors have the groove in them. They quit doing that in 73 2) The brake hose connects to a tab on the front side of the crossmember. They only did that in 71-72. In 73 and newer, the brake hoses go through holes in the framerails. __________________ I'm on the Instagram- @Gearhead_Kevin

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