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WHY is my flexplate the weak link in my drive train???

Discussion in 'The Garage' started by muddysub, Sep 24, 2002.

  1. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    this is the second one that is cracking! /forums/images/icons/mad.gif it makes a loud noise when i accelerate a lil harder than it would like. would a beefy heavier flexplate from summit or B&M or CSI fix it? /forums/images/icons/confused.gif
     
  2. Resurrection_Joe

    Resurrection_Joe 1 ton status

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    When I THOUGHT mine was cracked and I was freaking out (was loose bellhousing), Mike Blake related that he broke his allthe time untill hew went to a drag race one, no problems so far. He's not to easy on his truck either... /forums/images/icons/shocked.gif
     
  3. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    i know it's cracking, i recognize the sound of it. and the fact that my mom (previous owner) bought a $35 cheapo flex plate from autozone probably didn't help either. /forums/images/icons/mad.gif
     
  4. JK5

    JK5 1/2 ton status GMOTM Winner

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    I have the TCI flexplate, it is .035 thicker than stock, but there $70....at Summit Racing...
     
  5. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    </font><blockquote><font class="small">In reply to:</font><hr />
    , but there $70....at Summit Racing...

    [/ QUOTE ] at this point i don't care about money. i just wanna be able to accelerate with out worrying about fragging the flexplate. /forums/images/icons/frown.gif thanks i'll check out TCI.
     
  6. FWP

    FWP CRS

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    What's the condition of the tranny? Maybe the front bushings are worn? Maybe the torque converter itself has a balance problem. Motor- rear main bearings?, bent crank?

    Just a few random thoughts on what might crack a flexplate, other than old age.......
     
  7. HarryH3

    HarryH3 1 ton status Author

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    Summit has their house brand SFI approved flex plates for around $55. I just recently bought one to bolt to the 454 in the garage. I think that all of the SFI approved models are .035 thicker than stock. /forums/images/icons/cool.gif (It's real purdy too! It's a nice irridescent gold cad plated one.) /forums/images/icons/wink.gif
     
  8. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    </font><blockquote><font class="small">In reply to:</font><hr />
    What's the condition of the tranny? Maybe the front bushings are worn? Maybe the torque converter itself has a balance problem. Motor- rear main bearings?, bent crank?

    [/ QUOTE ] the tranny has like 40,000mi on it, torque converter: maybe, motor bent crank: I WISH!! i could put it in a shop and have it all checked out i guess.
     
  9. MudbogAD

    MudbogAD 1/2 ton status

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    Remember it happened after the mud pit Scott. I'd say it cracked from all the stress.
     
  10. ntaj*ep

    ntaj*ep 1/2 ton status

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    MMMMMMMMM, MUD!! /forums/images/icons/tongue.gif make parts go KABLEWIE!!!
    Are you running an inspection cover?
     
  11. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    yeah it started making noise when i had it floored for 2-3 min straight. and yes i have a cover on it. that's what it's hitting and making noise.
     
  12. 87sm465np208

    87sm465np208 1/2 ton status

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    make your own out of a peice of heavy duty steel, just a thought, probly what i would do, i had to do that with a skid plate, hell i broke the rear vent extension tube ( the steel tube part) off my rear diff yesterday, dont ask why or how, but i managed to fix it with a peice of small steel brake line and some electrical tape, blue rtv, and a hose clamp, that was the gayest thing i could of done that day, and i felt so stupid. /forums/images/icons/mad.gif
     
  13. HarryH3

    HarryH3 1 ton status Author

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    This is a flexplate. Making one of these bad boys and getting it trued and balanced in your home garage would be a pretty impressive feat! /forums/images/icons/shocked.gif

    [​IMG]
     
  14. Cmoe

    Cmoe 1/2 ton status

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    I had one from PepGirls for about a week before it cracked on me.... Put in one from Napa and it's held up for the last 3 1/2 years and still going strong (you know now that I said this I'm going to brake it, FLOL.....). Pepgirls and Autozonies are the same kind of stuff.... $hit!
     
  15. MudbogAD

    MudbogAD 1/2 ton status

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    Yeah, I would defintely run a stronger and/or thicker one.
     
  16. 87sm465np208

    87sm465np208 1/2 ton status

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    NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO i ment make a HD inspection plate, i thought you were talking about the inspection plate, im a dumb ass, my bad, if your gunna get one and use the truck hard, get a good one. /forums/images/icons/grin.gif
     
  17. TWISTEDJACK

    TWISTEDJACK 1/2 ton status GMOTM Winner

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    Sounds like excessive crank end play. Also the torque converter could have "ballooned up". I had to replace the
    torque converter on mine due to that. The damn thing actually swelled up, happens in rigs that pull a lot of weight. /forums/images/icons/crazy.gif
     
  18. mitymouse

    mitymouse Registered Member

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    I would go with the sfi they are twice as strong as stock and four times stronger then a cheapy aftermarket
     
  19. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    okay what would a heavier one do to the sub? summit claims quicker launch times, and that's important to all of us don't you know. i can't tell you how many races i've lost because i didn't get the wholeshot. /forums/images/icons/mad.gif
     

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