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Parking Brake not working after replacing calipers
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Hammer Time
Ultimate Carjunky
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Feb 10, 2014, 2:16 PM
Post #26 of 34
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Re: Parking Brake not working after replacing calipers
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If the parts are identical, then the problem has to be in the installation.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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JoeG_Sr
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Feb 10, 2014, 2:18 PM
Post #27 of 34
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Re: Parking Brake not working after replacing calipers
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UPDATE: When I returned the old brackets there was another manager I spoke with.
A single piston caliper bracket has a much narrower gap and it looks like it "fits" a 19 mm thick rotor.
The dual piston caliper bracket has a much wider gap which looks like it is for the 30 mm thick rotor.
Their guess (and yours) is that the rotors I took off the truck (19 mm) are wrong. I had the rotors last replaced by the dealer about 8 years ago. You would think (NOT!) they would get it right.
So I am looking at the RPO codes. The only one I have on my tahoe is JC5 which returns "Brake System (6100-7200 # GVWR) 4 Wheel Disc Brakes (Gasoline – Vacuu, Type Booster)"
Trying to uncover exactly what that means
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DanD
Veteran
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Feb 12, 2014, 6:24 AM
Post #29 of 34
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Re: Parking Brake not working after replacing calipers
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The way it looks to me its the wrong rotor. Is this by chance a dual piston caliper set up?
Looking at the specs of the two different rotors; the dual piston caliper's rotor looks like a better fit; going by the pictures you posted.
The hat of the duel piston rotor is 11mm taller which would move it closer to the inside of the perch.
Its also 5mm larger in overall diameter. Looking at your pictures the pads are running right at the edge if not over the edge of the disc.
The AC Delco part # for the dual piston caliper rotor is 18A1412.
I know you said that you compared the rotor with the old; but who's to say the old ones were the proper ones?
Dan.
PS Boy you guys type fast by the time I looked up the specs you guy are on to the second page of this thread LOL
Canadian "EH"
(This post was edited by DanD on Feb 12, 2014, 6:28 AM)
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Tom Greenleaf
Ultimate Carjunky
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Feb 12, 2014, 7:16 AM
Post #30 of 34
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Re: Parking Brake not working after replacing calipers
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Quote from Dan's post ">>but who's to say the old ones were the proper ones?<<" Yikes, a 2000 w 90,000K miles would probably have had all this stuff redone and some reason worked so now matching up old/new parts gets questioned - good point Dan as usual. That would mess anyone up.
OP - Sorry for the long thread but this has to come to a real fix. Something bugged me right off when the parking brake needed adjustment for new rotors but shoes didn't appear worn - ?? Bear with us trying - groping for why this is rearing it's ugly head. Dare say all involved have had some issue along the way with these - for me was brand new Tahoe (family owned not mine nor real near me) and dealer quit doing anything under warranty with no miles on the thing after two tries. 2001 or2002? aftermarket parts already available that fixed it with no help from GM which is now off this exact topic but there were issues on some right away - that's all. I feel you pain - this is just not cooperating, Tom
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JoeG_Sr
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Feb 12, 2014, 3:52 PM
Post #31 of 34
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Re: Parking Brake not working after replacing calipers
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Just so you know I am not a complete idiot here's the rotors. The correct rotor is the 30 mm thick one as everything looked great once it was installed.
We put about 50K miles on the truck in the first 3 years. All the rotors were replaced by the dealer. Since then we only put about 40K on and this is the first time that I have replaced the rear brakes since the dealer did.
Clearly the dealer screwed up and put the incorrect rotors on the truck. We are lucky that it never caused an accident.
Even with the JC5 RPO code I never found a reference that showed it needed the 30 mm rotors. I did find a technical service bulletin for a 01 Sierra pick-up that described a 30 mm rotor for a JC5 RPO.
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Tom Greenleaf
Ultimate Carjunky
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Feb 12, 2014, 4:12 PM
Post #32 of 34
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Re: Parking Brake not working after replacing calipers
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Big difference huh? WOW - Surprised like you it ever worked properly. Sorry for you it was such a hassle. Still check parking brake. lube slides/anti-rattle things. Bracket looks like it should have come pre lubed for slide pins.
Just watch out if the master adjustment usually in center under vehicle is all off for parking cables. I'd like to hear once driven all back together that it's working just ducky.
Good luck and good for you for perusing this,
Tom
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JoeG_Sr
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Feb 12, 2014, 4:20 PM
Post #33 of 34
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Re: Parking Brake not working after replacing calipers
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It's back together and working great. I was on the cold ground this morning installing the correct rotors. Had to get it done because we live in NC and have a huge (for us) snow and ice storm arriving now. Without it running, we would be trapped at our house.
I think the parking brake issue was completely unrelated to the caliper replacement. I'm guessing with how much lining was still on the the e-brake shoes , I've never had a working parking brake. Really makes you wonder how it passed inspection all these years.
I've never put the truck in drive to see if the parking brake held. I only did it this time to make sure I had everything back together after I replaced the caliper.
Thanks to everyone for their help.
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Tom Greenleaf
Ultimate Carjunky
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Feb 12, 2014, 4:34 PM
Post #34 of 34
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Re: Parking Brake not working after replacing calipers
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If the spin free don't open a new problem till storm has past NC now. Same crap heading all the way up coast just more able to deal with it here in Mass. Stay safe on both fronts! Tom
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