Question about ABS

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  #1  
Old 04-01-03, 08:54 AM
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Question about ABS

i have a 98 Chev Cavalier and i'm kinda new to vehicles with ABS.

we had some snow this am and when i hit the brakes the ABS makes sort of a loud Thumpa Thumpa sound , on our 95 Astro the Abs makes sort of a loud Whirrrr sound ,, the Cav is new to us so i'm just wondering if the Thumpa sound is normal for this vehicle.

thank you and i hope you understand what i'm trying to say.
 
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Old 04-01-03, 09:00 AM
Joe_F
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It's probably the sound of the ABS modulator activating.
 
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Old 04-01-03, 09:12 AM
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thanks for the response Joe, like i said the noise from the Cav is soooo much different than the Astro that i was wondering whether there was something wrong with it.

Is it normal that in the snow when the abs kicks in that the car shakes?? it stops straight and true , it's just the noise that concerned me.
 
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Old 04-01-03, 09:16 AM
Joe_F
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Depends on where the shake is coming from and how bad. If you're in doubt, have it looked at professionally, as brakes are not something to gamble with.
 
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Old 04-01-03, 09:20 AM
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the "shake" is only when the abs engages , other than that on dry or wet roads it stops with no sounds , shudder , basically the way it should , i know the Astro "shakes" a bit when the abs engages as well but it's just the difference in sound when the abs engages between the two vehicles that had me wondering.
 
  #6  
Old 04-02-03, 10:09 AM
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ABS on different vehicles sound different. I've had smooth abs and I've had abs that makes the whole car herky-jerk to a stop.

It sounds normal to me, friend.

There are quite a few different types of abs even. They're all bound to sound different.

The abs on my caravan is terrible. It works great, but sounds like someone's hitting the van with a sledge hammer every time the brakes pump.
 
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