Shaking when braking at speed
07-07-2008, 10:12 PM
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Car: 1991 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Axle/Gears: 10 bolt, 3.08
Shaking when braking at speed
Just found this out on a Camaro cruise...
My car shakes real bad, I think from the back, when I put the brakes on moderately hard and at higher speeds (70km/h or higher) (40mph?). Its not a warped drum or rotor feeling but rather a shaking feeling in the whole car (not the brake pedal). As soon as I take my foot off the brake it disapears. During normal gradual braking it is nice and smooth like new.
Any ideas?
My car shakes real bad, I think from the back, when I put the brakes on moderately hard and at higher speeds (70km/h or higher) (40mph?). Its not a warped drum or rotor feeling but rather a shaking feeling in the whole car (not the brake pedal). As soon as I take my foot off the brake it disapears. During normal gradual braking it is nice and smooth like new.
Any ideas?
07-07-2008, 10:23 PM
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Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
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Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: Shaking when braking at speed
sounds like a warped rotor/drum
if you are sure thats not the case check to see if the rear suspension, ie control arms and panhard are in good working order.
if you are sure thats not the case check to see if the rear suspension, ie control arms and panhard are in good working order.
07-08-2008, 06:54 PM
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Car: 1991 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Axle/Gears: 10 bolt, 3.08
Re: Shaking when braking at speed
It felt like wheel hop to me too. Definately not warped brakes as I would be able to feel those at any speed braking and it was too violent to be that.
07-08-2008, 09:46 PM
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Car: 1991 camaro rs
Engine: 350
Transmission: 5 speed
Axle/Gears: stock for now
Re: Shaking when braking at speed
does the steering wheel shake real bad when braking and stop when you release the brakes? If it does than its definitely your brakes. If not I would lift your car and check for bent or broken suspension parts.
07-08-2008, 10:17 PM
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Car: 85z-28
Engine: gm goodwrench 350
Transmission: t-5
Axle/Gears: stock, 3.08 one wheel peel!
Re: Shaking when braking at speed
good luck
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02-25-2009, 07:01 PM
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Car: 1991 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Axle/Gears: 10 bolt, 3.08
Re: Shaking when braking at speed
New rear shocks, replaced all bushings with poly. Now its rock solid.
03-17-2009, 01:05 PM
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Car: 2009 Pontiac G8 GXP
Engine: LS3
Transmission: 6L80E
Axle/Gears: 3.27
Re: Shaking when braking at speed
Dennis...do you think the problem was primarily with the shocks or the bushings? I have driven a lot of junk cars earlier in life...and I found out that if shocks are bad...they can set up a harmonic resonance in the car similar to what you were talking about.
Or do you think that the worn bushings in the rear actually did cause minor wheel hop?
Just curious...
Or do you think that the worn bushings in the rear actually did cause minor wheel hop?
Just curious...
03-19-2009, 09:59 PM
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Car: 1991 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Axle/Gears: 10 bolt, 3.08
Re: Shaking when braking at speed
Probably both but its just a guess. Maybe the extra play in the bushings let the back end jolt around a bit more and the shocks were so worn they could not damp that extra movement. The shocks were literally toast, I can compress them and they do not rebound even over time. DEAD
03-19-2009, 11:47 PM
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Car: 1987 Iroc-Z28
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: G92 3.23, G80, J65 disc
Re: Shaking when braking at speed
on my Buick it was doing this exact same thing horribly bad for a long time and then the Rack actually broke and now that its fixed it is 80-90% better. Soooo id say check all you tie rods, center link, and idler arm. They could be warn out and be causing the shaking. I know its weird but it fixed my car.
03-20-2009, 12:12 AM
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Car: 2009 Pontiac G8 GXP
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Transmission: 6L80E
Axle/Gears: 3.27
Re: Shaking when braking at speed
It is interesting how whether the car if FWD or RWD...there can be some troubleshooting similarities...including dead shocks/struts and worn bushings.
03-20-2009, 10:35 AM
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Car: 1987 Iroc-Z28
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: G92 3.23, G80, J65 disc
Re: Shaking when braking at speed
Very odd i know, theres still a slite shake but i know thats bcuz it needs a set of rotors on it. Still the stock ones on it with tons of miles, the odometer dont work so yea.
03-29-2009, 07:22 PM
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Car: 85 Z28 Camaro
Engine: TPI 305
Transmission: 5 spd
Axle/Gears: Uh, Haven't investigated this yet
Re: Shaking when braking at speed
Could be a Cracked drum? I just ran into this. Higher speed tend make my car shake with harder braking.
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