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Author Topic: Poor Braking  (Read 11840 times)

Offline Edahall

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Re: Poor Braking
« Reply #15 on: May 05, 2010, 11:23:11 am »
Update:
The brakes are working well. I put a vacuum gauge on the system and I was getting 25 inches of vacuum. I then checked the master cylinder reservoir and found that the fluid for the rear brakes was very low. I added brake fluid and took a test drive. After about 20 stops, the brakes started working normally.
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1990 ¾ ton 4x4 Chevy Suburban
-Cummins Diesel - 12 valve - factory rebuilt
-6 speed bullet proof manual transmission - NV5600
-Gear Vendors Overdrive
-Upgraded Holset HX-35 turbo
-NP205 iron transfer case
-3.73 gears
-2" Lift

Offline eventhorizon66

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Re: Poor Braking
« Reply #16 on: May 05, 2010, 07:13:25 pm »
If the MC was that low, it'd be a good idea to bleed the system.
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'85 C10 SWB 350 700R4 TKO600

Offline ccz145a

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Re: Poor Braking
« Reply #17 on: May 06, 2010, 09:20:54 am »
And the fluid had to go somewhere, it's a closed system. Check your master, lines, hoses, calipers and cylinders and find out where it went.
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1975 C10 Silverado LWB, 454CID, TH400, 10bolt 3.42
11MPG Downhill w/tailwind (but there ain't no hills here)

Offline Jacked85K10

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Re: Poor Braking
« Reply #18 on: May 10, 2010, 12:16:51 am »
The whooshing noise you are hearing is a sign of a bad booster. When you pulled the vacuum line off the booster did you notice and brake fluid residue in the hose? If so consider replacing your master cylinder also.
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