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Help: Issue when I hit a bump and have foot on brake

Discussion in '2nd Gen. Tacomas (2005-2015)' started by GeotechTaco, Dec 17, 2011.

  1. Dec 17, 2011 at 6:32 AM
    #1
    GeotechTaco

    GeotechTaco [OP] Member

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    Andy
    Knoxville, TN
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    08 Tacoma DC 4x4 TRD-Offroad
    I've had my 2008 Dbl Cab TRD off road taco with 52,000 miles for a month now. It has me kind of worried though. When I go over a bump (i.e.speed bump or pot hole) at a decent speed like 20 mph and have my foot on the brake, I hear a noise that sounds like the engine revs or like a vibrating sound on the outside of the car. Additionally it feels like the car wants to keep with its momentum even though my foot is on the brake consistently. I know its not the engine revving more since I'm watching the tachometer, thats just the best way to describe the sound.

    Anybody experienced this or know the cause...when I first bought my truck I had a Certified Toyota dealership inspect it since i bought it from car max. The only thing they told me is that it was about time to replace all my drivetrain fluids.
     
  2. Dec 17, 2011 at 6:38 AM
    #2
    jjew18

    jjew18 the Nightman cometh!

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    Have you replaced the fluids? Do you have a video or audio clip so we can hear what you are hearing?
     
  3. Dec 17, 2011 at 6:39 AM
    #3
    DEEVON911

    DEEVON911 Semi-Pro

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    Bethel Park, PA. Burb of da Burgh.
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    TRD Cat-back Exhaust. Semi-Debadged. Trimmed down stock Antenna. Weathertech vent visors. TRD FJ Cruiser Center Cap Wheel Mod. 265/75/16 Firestone Destination A/T,s . Inverter tapped into for outlet in cab. Tacomaworld sticker which adds 5 hp.
    ABS kicking in maybe?

    Edit: from what I understand alot of people complain about the ABS kicking in too easy. Alot of people have said when they hit a bump they notice it. Its normal if thats what it is.
     
  4. Dec 17, 2011 at 6:39 AM
    #4
    LUSETACO

    LUSETACO Here for the Taco Pron

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    Yes
    Ummmmm.....ABS?
     
  5. Dec 17, 2011 at 6:47 AM
    #5
    GeotechTaco

    GeotechTaco [OP] Member

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    Sorry I don't have a video or noise clip yet. I can try to get one some time soon. I haven't replaced the fluids yet. Honestly, I talked to a guy at work about the fluids and he'd heard from a different Toyota Dealership that at 50k miles the fluids should be fine and not replaced yet. Does it sound like a problem with ABS or something normal? My last Taco didn't have ABS and was the only other car I owned.
     
  6. Dec 17, 2011 at 6:48 AM
    #6
    shawnd2

    shawnd2 Well-Known Member

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    Shawn
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    Sounds like the ABS to me to.
    Mine does it as well. There is a thread on here about disabling the ABS if it bothers you that much.

    Shawn
     
  7. Dec 17, 2011 at 6:51 AM
    #7
    jjew18

    jjew18 the Nightman cometh!

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    Oh yes.
    OP is it somewhat of a grinding noise?
     
  8. Dec 17, 2011 at 6:52 AM
    #8
    DEEVON911

    DEEVON911 Semi-Pro

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    TRD Cat-back Exhaust. Semi-Debadged. Trimmed down stock Antenna. Weathertech vent visors. TRD FJ Cruiser Center Cap Wheel Mod. 265/75/16 Firestone Destination A/T,s . Inverter tapped into for outlet in cab. Tacomaworld sticker which adds 5 hp.
    It is normal, if it is the ABS. Is it almost like a ticking sound at a rapid rate?

    Edit: LOL john was faster than me.
     
  9. Dec 17, 2011 at 6:56 AM
    #9
    spidy3

    spidy3 Well-Known Member

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    Its the ABS and its normal. When you have your foot on brake and when you go over a bump/pothole your tires end up not going the same speed and it thinks a wheel is slipping
    (one is slowing down and the other isnt) when your trying to stop.
     
  10. Dec 17, 2011 at 7:12 AM
    #10
    GeotechTaco

    GeotechTaco [OP] Member

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    Andy
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    Thank you all for the fast responses. It sounds like thats the issue and its normal. Appreciate it greatly.
     
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