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Leaking Brakes

Tiny
JONNYIS1
  • MEMBER
  • 2001 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 350,000 MILES
My truck has a major leak near the back all the brakes are soaked in what seams like grease and I cant figure out where the leak is coming from or how to fix it can you help?
Saturday, July 12th, 2008 AT 7:46 PM

12 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
The problem is leaking axle seals. rear end gear oil is leaking onto the brakes from the seal. you need to remove the rear end cover to access bolt to remove axles to replace the seals. this video will show how to fix it

https://youtu.be/EMxfb9X3ywE

and

https://youtu.be/ytqXLSjHNm0

Please run down these guides and report back.

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Saturday, July 12th, 2008 AT 7:54 PM
Tiny
JONNYIS1
  • MEMBER
  • 2 POSTS
Thanks but do you know how to remove the rear axle I cant seem to get it
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Saturday, July 12th, 2008 AT 9:50 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Remove the rear end cover and spin rear diff until you see a 5/16 bolt. Remove the bolt and the long pin in the middle will come out, then push axle in and a c clip will pop out allowing the axle to be removed. Just do opposite to reassemble
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Monday, July 14th, 2008 AT 3:28 PM
Tiny
JRANNE1994
  • MEMBER
  • 3 POSTS
  • 2000 CHEVROLET SILVERADO
  • 190,000 MILES
My husband changes brakes front and back also all 4 calipers. We bled the brakes and have them pumped up, but as soon as you start the truck and wait about 20 seconds the peddle goes to the floor. He bought a one man bleeder and it says there is a leak, but we can not find it. We are at our wits end and don't know what else to do.
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Tuesday, February 23rd, 2021 AT 9:41 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
If you had a leak, you would see it puddle somewhere. It sounds like you have air in the system caught somewhere.

Why did you do this operation?

Roy
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Tuesday, February 23rd, 2021 AT 9:41 AM (Merged)
Tiny
JRANNE1994
  • MEMBER
  • 3 POSTS
My husband changed the calipers mainly because one wasn't working right in the back so he changed all the calipers and the decided that he might as well change the brakes to since the one was worn down due to the bad caliper. He bled the brakes because the peddle was going down farther then it should. We got all the air out of the lines but like I said after starting the truck and waiting about 20 seconds the brake peddle goes to the floor. There is no puddle that is why we are having a hard time trying to find the leak.
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Tuesday, February 23rd, 2021 AT 9:41 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Did you pump the pedal several times to get the pads back up to the rotors? If so, you may have lost the master cylinder. Get a shop to look at it and confirm.

Roy
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Tuesday, February 23rd, 2021 AT 9:41 AM (Merged)
Tiny
JRANNE1994
  • MEMBER
  • 3 POSTS
Ok. Thank you
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Tuesday, February 23rd, 2021 AT 9:41 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good luck
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Tuesday, February 23rd, 2021 AT 9:41 AM (Merged)
Tiny
SKGRAY0112
  • MEMBER
  • 3 POSTS
  • CHEVROLET SILVERADO
1988 Chevy Silverado EFI 1500. Mileage: 435,000 plus, but it's on third engine. The right rear wheel cylinder keeps breaking. I have replaced it three times in the last 6 months. Thought it may be weak springs, so I put in new ones. The shoes seem to be aligned just fine, and the brakes work until the cylinder breaks and I lose fluid. Any thoughts?
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Tuesday, February 23rd, 2021 AT 9:41 AM (Merged)
Tiny
STEEL BILL
  • MEMBER
  • 6 POSTS
Check to see if the axle or axel tube may be bent causing a misalignment. Also ask your parts man for the best quality cylinder, you may be getting some cheap poor quality parts
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Tuesday, February 23rd, 2021 AT 9:41 AM (Merged)
Tiny
SKGRAY0112
  • MEMBER
  • 3 POSTS
The axle looks ok as far as I can tell. I've been putting on the cheap $10 part. This time, I ordered a Bendix for around $30. (Not quite ready to fork over $80 plus for genuine GM.) If that's the problem, I should know in a month or two and will post the results. Thanks for your reply.
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Tuesday, February 23rd, 2021 AT 9:41 AM (Merged)

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