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Thread: I believe my tranny is having issues (any input FLT?)...

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  1. #1
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    I posted a while back about how immediately after I got the torque converter installed (immediately as in on the way home from the shop) something would vibrate ever so slightly under the truck. I got a lot of input about different possibilities (heat shields, etc.) and removed those, but the problem is still there.

    Except it's getting a LOT worse. Here's what it does:

    The vibration ALWAYS starts when I gently ease on the throttle. Never below like 30 mph or pulling out of the driveway or anything - just mainly if I'm out driving normally and give it just a little bit of pedal to maintain my speed - it will make a very loud vibrating/rattling sound. It never seems to do it in 1st gear - not sure about second. But definitely in 4th and pretty sure it does it in 3rd too. Since it's only in certain gears, could it be clutch packs in the tranny? Or maybe it's a flaw in the converter? I'm lost here.

    Any help would be appreciated.

  2. #2
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    Do you still have your cats?
    2004 EXC Silverado 6.2L
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    6.2L L92, Ported and Polished stage 3 heads, 95mm Throttle Body, 100mm MAF, NA, Pacesetter LT Headers, Magnaflow X-Pipe Muffler, Electric Fans, 160* thermostat, 2" Drop Shackles, Hellwig Sway Bars Front and Rear, Monroe Reflex Shocks, NGK Spark Plugs, AMW Oil Catch Can, 17"x10" wheels on Kuhmo Tires.

  3. #3
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    <div class='quotetop'>QUOTE(shwarmy &#064; Jan 3 2007, 07&#58;54 PM) [snapback]78241[/snapback]</div>
    Do you still have your cats?
    [/b]

    I do.

    And three dogs.

    Just kidding, Yes, I have my cats.

  4. #4
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    Does it have any vibration while in neutral? IM thinking if it’s a balancing issue with the tq then you would probably feel it while in neutral. Driving vibration im wondering if the back of the trans could be shifted left or right on the crossmember just a couple of degrees that could cause vibration. Now far as internals of the tq I wouldn’t know. You didn&#39;t change flex plate did you?

    05 RC, LME 6.0, 243 Heads, LSA Rods, 11:25 Forged Pistons, Cam Motion Custom Grind, 4:10, Eaton LSD, Narrowed Rear-end w/ Chromoly Axles, Pacesetters LT's, SLP Loudmouth II Mufflers, Volant CAI, Yank SSTB3600, Bosch 42 lbs inj's, G-Force Tune, FLT Level 4 Trany, Belltech 2/4, Times: ?
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  5. #5
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    <div class='quotetop'>QUOTE(Gator &#064; Jan 3 2007, 08&#58;27 PM) [snapback]78244[/snapback]</div>
    Does it have any vibration while in neutral? IM thinking if it’s a balancing issue with the tq then you would probably feel it while in neutral. Driving vibration im wondering if the back of the trans could be shifted left or right on the crossmember just a couple of degrees that could cause vibration. Now far as internals of the tq I wouldn’t know. You didn&#39;t change flex plate did you?
    [/b]

    Absolutely never vibrates in neutral - just when I begin to put a load on it while driving normally.

    Never though or heard of the possibility of the trans being shifted. Not sure how I&#39;d go about checking that either. (Oh Billlllllyyyyy.....).

    I believe Billy reused the original flexplate when he installed the converter.

  6. #6
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    <div class='quotetop'>QUOTE(DamnYankee &#064; Jan 3 2007, 08&#58;45 PM) [snapback]78248[/snapback]</div>
    Absolutely never vibrates in neutral - just when I begin to put a load on it while driving normally.

    Never though or heard of the possibility of the trans being shifted. Not sure how I&#39;d go about checking that either. (Oh Billlllllyyyyy.....).

    I believe Billy reused the original flexplate when he installed the converter.
    [/b]
    I HAVE HEARD OF SMALL CONVERTERS DOING THAT. I COULD BE WRONG. I THINK THE SMALL STALL ARE MADE FOR MORE STRIP AND A LITTLE STREET. THIS IS JUST MY TWO CENTS THOUGH?

    JAMEST
    12 Sec. Club! SOLD
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  7. #7
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    <div class='quotetop'>QUOTE(Jamest &#064; Jan 4 2007, 07&#58;12 AM) [snapback]78273[/snapback]</div>
    I HAVE HEARD OF SMALL CONVERTERS DOING THAT. I COULD BE WRONG. I THINK THE SMALL STALL ARE MADE FOR MORE STRIP AND A LITTLE STREET. THIS IS JUST MY TWO CENTS THOUGH?

    JAMEST
    [/b]

    hmmm. I don&#39;t think it&#39;s supposed to be doing this though. Sounds like the thing is going to fall off the truck.

  8. #8
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    maybe a driver modification would help

    jk man good luck with workin that out... check with dannys dad he may be able to help you out
    Quote Originally Posted by DamnYankee View Post
    lol...I wish you would never paint your truck...I bet it bugs them that much more that a primered up truck just soggied his Wheaties. good job buddy
    sprayedenali: i like catching, but not fishing
    DBTBSS: bring Tyler... we need someone to make fun of
    MidnightRider: your right im gay
    DamnYankee: my nana failed
    DamnYankee: confused...if it can't keep up to begin with, how can it keep up
    mitch cobb racing: ya, allen played with it for a while, HUGE difference

  9. #9
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    <div class='quotetop'>QUOTE(TxStVanWilder &#064; Jan 4 2007, 06&#58;32 PM) [snapback]78333[/snapback]</div>
    maybe a driver modification would help

    jk man good luck with workin that out... check with dannys dad he may be able to help you out
    [/b]

    You&#39;re probably right - I probably get on it too much and something is finally saying "enough". In fact I was getting on it coming home from the airport this morning and it almost seemed to stick in third. Was revving at about 6,000 and it just held there for a bit - then finally shifted. That&#39;s a first. I hope I&#39;m not about to lose my transmission.

    Who&#39;s Danny and what&#39;s his dad do?

  10. #10
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    Well I just talked to Jerry at Jerry&#39;s Transmissions, and by the description of the problem, he said it definitely sounds like the 3-4 clutch packs going. He&#39;s going to listen to it/drive it tomorrow morning to see for sure, but if that&#39;s what it is, I&#39;ll be looking at a &#036;2,000 repair. I&#39;m guessing he&#39;s my best bet to have this done? I&#39;ve heard Rock On is good, but they&#39;re way up in Denton as opposed to Garland (I&#39;m in Mesquite). And for some reason neither of the phone numbers on their site are working.

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