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03-16-2007, 08:20 PM
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#1 | |
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AF Newbie
Join Date: Mar 2007
Location: Zoologic, Georgia
Posts: 4
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Brake shudder- 95 Lumina 3.1 Car
Only feel it when brakes applied hard above 45mph or so.
Replaced back brakes including drums and hardware- somewhat better- Front rotors are fairly new, checked them, aren't warped. Brake pedal does not pulse, doesn't pull- Any suggestions? |
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03-17-2007, 09:35 AM
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#2 | |
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A990 racer
 Join Date: Mar 2002
Location: Chestertown, New York
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Re: Brake shudder- 95 Lumina 3.1 Car
Welcome to AF. You checked the ft rotor runout with a dial indicator? Apply the parking brake a low speeds see if you feel the same shudder.
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03-17-2007, 10:05 AM
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#3 | |
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Lactose the Intolerant
Join Date: Aug 2004
Location: Nowhere, Missouri
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Re: Brake shudder- 95 Lumina 3.1 Car
If you have the alloy wheels, they MUST be evenly torqued at 100 ft/lbs or they will distort the rotors and cause this....if you don't do this, you'll be chasing your tail trying to find it...
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You made three mistakes. First, you took the job. Second, you came light. A four man crew for me? F**king insulting. But the worst mistake you made... ...empty gun rack. |
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03-17-2007, 08:45 PM
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#4 | |
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AF Newbie
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Re: Brake shudder- 95 Lumina 3.1 Car
Thanks to you both- I didn't use a dial indicator, just a straight edge- but that probably is the next step-
Also had a thought about the valve that distributes the pressure front/rear, can't remember the name of it now. Has either of you had a problem with that? No alloys on this mighty Lumina... |
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03-18-2007, 10:32 AM
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#5 | |
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A990 racer
Join Date: Mar 2002
Location: Chestertown, New York
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Re: Brake shudder- 95 Lumina 3.1 Car
The proportioning valve is not your problem here.
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03-25-2007, 04:46 PM
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#6 | |
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AF Newbie
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Re: Brake shudder- 95 Lumina 3.1 Car
I agree with you at this point, tried the parking brake - no shudder, so the back ones are good-
Will have to use dila indicator on the disc s in front- can't be huge as I rotated and eyeballed with a straight edge- Guess I'll find out how well auto zone stands behind their stuff- they are only a few months old! Anyone have bad experience with autozone? Thanks for the help! |
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03-26-2007, 09:14 AM
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#7 | ||
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stupidity should hurt
Join Date: Aug 2004
Location: Flint, Michigan
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Re: Brake shudder- 95 Lumina 3.1 Car
Quote:
Another thing to check is your outer tie rod ends. If worn out, (fairly common issue on GM W-bodies), they can cause a shudder under hard braking above 40'ish that won't show up under light braking. Normally, warped rotors will cause a pulsation regardless of speed or pressure applied, it will just be less noticeable.
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 Still waiting for the "good old days" I'll get to bore my future grandchildren with! |
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