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Old 01-30-2011, 08:53 AM   #1
couperider1
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steering wheel chatter

What's up guys? I noticed a weird steering wheel chatter last night and I want to knw if all Gto's do this because of hydro boost. The chatter only happens when I'm parked. If I put my foot on the brake and turn the wheel left to right all the way the front wheels chatter sometimes. If I dnt have my foot on the brake and do the same thing no chatter. Is this normal??
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Old 01-30-2011, 09:58 AM   #2
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Can someone check there car an let me knw if it does the same thing please.
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Old 01-30-2011, 12:49 PM   #3
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mine does that every once in a great while.
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Old 01-30-2011, 01:06 PM   #4
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Thanks man. Do you knw if it normal.
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Old 01-30-2011, 01:09 PM   #5
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aI heard that they where hydro boost. but the power steering isn't connected to the brake system is it?
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Old 01-30-2011, 01:59 PM   #6
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Its a hydraulic assist yes.

Hydroboost is only used on diesels and Astro/Safari, and is power brake assist.

Some noise/judder at lock is normal. Its the pressure relief valve in the pump blowing off. Dont hold it there for longer than a few seconds or you can blow out the rack seals or the pump. Or both.
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Old 01-30-2011, 02:18 PM   #7
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The chatter happens in-between turning the wheel all the way. I dnt hold it I just turn all the way left to right or vise versa. @ konnie - by @ lock do u mean when the wheel is turned all the way to one side or when you have the wheels lock with the brake?

Last edited by couperider1; 01-30-2011 at 02:19 PM. Reason: a
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Old 01-30-2011, 04:07 PM   #8
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Yes, 'lock' is full right or left. Thats the only time its 'normal' to feel or hear what you describe.

If its happening between neutral and lock, you have 2 options: the rack has an internal failure, or maybe a rusted/binding joint on the intermediate shaft. Check for leaks into the rack boots.
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Old 01-30-2011, 04:47 PM   #9
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Quote:
Originally Posted by Konnie the Goat...View Post
Its a hydraulic assist yes.

Hydroboost is only used on diesels and Astro/Safari, and is power brake assist.

Some noise/judder at lock is normal. Its the pressure relief valve in the pump blowing off. Dont hold it there for longer than a few seconds or you can blow out the rack seals or the pump. Or both.

Correction many year Cadillacs, Mustangs, some chryslers, aLot of pick up trucks depending on the brake package and various others it's actually pretty popular. Our GTO's however don't although I have considered a adding it as I do like the Tech.
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Old 01-30-2011, 05:05 PM   #10
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Hydroboost sucks dick, and isnt that common. At one point, it was going to be the next big thing, notice how that didnt happen.

Drove a hydroboost vehicle for 10 years (Safari), and I hated it. Stupidest idea ever. Pedal always felt like shit and nothing like losing power brakes and power steering at the same time.
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Old 01-30-2011, 05:23 PM   #11
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@konnie does having your foot on the brake make the rack work harder? I had someone press the brake and turn it back an fourth and it takes a few rotations and the front wheels will shake. It does not do it all the time. And if his foots not on the brake it never does it. No leaks not low on fluid. I did have news wheels put on Fri but they are 18s 235 40 in the front. Never noticed it with my stock 17s.
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Old 01-30-2011, 06:09 PM   #12
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Obviously, if the tire cant rotate in a turn (and they normally do, its why alignment racks have turn tables for the caster sweep) it will take more effort to turn, and put a higher load on the pump.

It still shouldnt act up in a noticeable manner in the middle of travel as you describe.

At this point, Id suggest evaluating the fluid. Its not hard to fluch the system your self. You just need a way to suck the old fluid out, and add more. It'll take 2-3Q. Do it with the engine running, and cycle the wheel full travel while doing it. Suck the reservoir dry, refill, cycle the wheel, repeat. Till the fluid is all nice and new.

If the fluid is really dark, or wont come clean, the seals in the rack are shot and its leaking internally.

The new tires shouldnt affect it. Maybe, if they were super sticky, but i still dont see it.
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Old 01-30-2011, 06:23 PM   #13
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I had a similar problem when I replaced the suspension, wheels and tires. I bled the system and it got better, it will still do it once in a great while. Mine seems to be heat related.
http://www.ls1gto.com/forums/showthread.php?t=349201
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Old 01-30-2011, 06:28 PM   #14
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Ok I will try that. Thanks. I'll let you guys knw tomorrow if it works.
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