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What is this cow bell sound when shifting into gear??

Discussion in 'New Members' started by dtweiss74, Oct 2, 2010.

  1. Oct 2, 2010 at 9:41 AM
    #1
    dtweiss74

    dtweiss74 [OP] New Member

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    I have a 1999 Tacoma Extended Cab, TRD 4WD, Auto transmission, 160,000 miles.

    When shifting into gear either Drive or Reverse, I hear a cow bell sound from underneath the vehicle. I can't tell if its in the front or rear. It happens mostly when I'm in gear, then press on the gas. The best I can describe it is a cow bell being rung. Sometimes its one ring, and others its multiple rings. The truck seems to shift fine and I don't hear this sound when driving. Anyone have any thoughts on this?

    Another issue:

    Just recently this problem has been occuring and is freaking me out. Only when the engine is cold this occurs. I shift into drive and the truck jolts dramatically, like the transmission is slipping. It happens a couple of times, then catches and I'm able to drive. It ONLY happens in the morning. Reverse seems to be ok. It's only in drive where it slips. In the middle of the day when the engine is cold, this doesn't happen. It only occurs in the morning. Please any help on diagnosing this would be helpful.

    Thanks!
     
  2. Oct 2, 2010 at 9:48 AM
    #2
    fireturk41

    fireturk41 I like to break shit!

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    just seems like your clutch packs in the transmission are a lil worn and its takeing more fluid pressure build up to activate them, not bad nor good....


    have you ever changed the fluid, if not i reccomend it, but do not flush it if its never been changed before
     
  3. Oct 2, 2010 at 10:35 AM
    #3
    whitetoblack

    whitetoblack ******

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    sounds like you arent using your parking break..mine does that when i forget to put it on...
     
  4. Oct 2, 2010 at 1:49 PM
    #4
    dtweiss74

    dtweiss74 [OP] New Member

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    I actually just flushed. I took her into the shop for a complete high mileage tune up. However, this sound was occurring before I did this. It's the transmission slipping that is new. It doesn't seem like this is something I can handle on my own. Or is it?
     
  5. Oct 2, 2010 at 9:46 PM
    #5
    fireturk41

    fireturk41 I like to break shit!

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    cowbell sound is normal

    slipping could be caused by the flush, when older transmissions are flushed it can knock loose particals that may have been holding things together or cause o-rings to leak or become dislodged.

    since you flushed you wont need to change the fluid for about 30k more miles

    the slipping could be caused by this, but id give it time to see if it evens out, if it gets worse as a last ditch effort id drain the fluid and replace 1 of the quarts with Lucas Transmission fix...but only as a last ditch because things like that can cause transmissions' o-rings to quit contracting and slip off with time
     
  6. Nov 6, 2010 at 8:53 AM
    #6
    SnowAviation

    SnowAviation New Member

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  7. Nov 6, 2010 at 9:32 AM
    #7
    The1youluv2hate

    The1youluv2hate Well-Known Member

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    Ur tranny scraping the ground
     
  8. Nov 7, 2010 at 8:59 AM
    #8
    dtweiss74

    dtweiss74 [OP] New Member

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    I think it's my U joint and I know very little about car mechanics. It's still doing it.

    And now, my truck jolts when coming to a stop. I press on the brakes, and just when I'm to a stop it jolts at me, like I'm being hit from behind.

    At this point I'm worried.
     
  9. Nov 7, 2010 at 9:06 AM
    #9
    MTgirl

    MTgirl too many frogs, not enough princes... Moderator

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    try greasing the drive shaft - 7 zerks total - and see if that helps. you might also be a victim of axle wrap. basically the worn out suspension gives you that lurch like you've just been rearended when you stop.
     
  10. Nov 7, 2010 at 9:35 AM
    #10
    00taco

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  11. Nov 7, 2010 at 9:44 AM
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    SoutheastTaco

    SoutheastTaco Resident Jackass

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