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Thread: Input shaft breakage

  1. 04-27-2008, 07:44 PM #1
    Rampage16V
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    Input shaft breakage





    Broke trans input shaft carnage. Rampage was making some good power. This was with street tires on it just after shifting into third.

    Any tips on making it last longer. about 7 passes on it with the new valve body.

    Dean Stillie
    87 Shelby Z 2.4 Turbo 9.06@146.05
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  2. 04-27-2008, 07:55 PM #2
    2.216VTurbo
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    Re: Input shaft breakage

    Looks like it's right at the neckdown Maybe some kind of surface treatment or Cryo? Most of the race teams are using Cryo on their trans parts...

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  3. 04-27-2008, 08:17 PM #3
    bradp
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    Re: Input shaft breakage

    Looks as though there was something either stressed or wore out in the trans.
    Brad Pennington-Proud SDAC Member 1987 Dodge Shelby Charger 1988 Chrysler Lebaron Premium Turbo Convertible 1990 Dodge Shadow VNT Competition 1 of 30
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  4. 04-27-2008, 08:30 PM #4
    Rampage16V
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    Re: Input shaft breakage

    stessed yes. from a freakin haulin --- 2.4!!
    trans is all new
    the shaft ...you can see how it tapers out near the break point. Also the splines are twisted at the converter end. This thing shift really really hard into third.

    Dean Stillie
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  5. 04-27-2008, 11:00 PM #5
    WVRampage
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    Re: Input shaft breakage

    Wow that takes some talent to do that.The only thing I can say is maby have a new one cryo treated.
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  6. 04-28-2008, 04:24 AM #6
    Ondonti
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    Re: Input shaft breakage

    Is that a stock shaft?
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  7. 04-28-2008, 05:11 PM #7
    Rampage16V
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    Re: Input shaft breakage

    Quote Originally Posted by Ondonti View Post
    Is that a stock shaft?
    Yes a stocker

    Dean Stillie
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  8. 04-28-2008, 05:48 PM #8
    Turbodave
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    Re: Input shaft breakage

    Weren't there a few guys looking into Shafts made of 300M for this reason? What ever became of that?
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  9. 04-28-2008, 05:55 PM #9
    turbovanmanČ
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    Re: Input shaft breakage

    Quote Originally Posted by Turbodave View Post
    Weren't there a few guys looking into Shafts made of 300M for this reason? What ever became of that?
    That thread is in the old FAQ's but I digress once again.

    Good job on the breakage, Didn't someone say heat treating is better? the Honda drag guys were doing it in the Nopi series and there trans were holding together after it was done.
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  10. 04-28-2008, 06:17 PM #10
    Dave
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    Re: Input shaft breakage

    OhioRob is running a 300M input shaft if I remember right. He ran it all last year with a Quaiffe. Only thing he broke, that I know of, was a piston.
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  11. 04-28-2008, 08:00 PM #11
    zin
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    Re: Input shaft breakage

    Time to help Mike (me) become less confused. Is the input shaft folks are referring to from a Chrysler 300M trans, or is it an input shaft made from Maraging300? The later makes the most sense to me, but...

    Mike
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  12. 04-28-2008, 08:02 PM #12
    turbovanmanČ
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    Re: Input shaft breakage

    Quote Originally Posted by zin View Post
    Time to help Mike (me) become less confused. Is the input shaft folks are referring to from a Chrysler 300M trans, or is it an input shaft made from Maraging300? The later makes the most sense to me, but...

    Mike
    300m is the material of the new input shaft.
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  13. 04-28-2008, 08:05 PM #13
    Rampage16V
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    Re: Input shaft breakage

    Yes the shaft has been polished and is just in the cooling stage now

    Dean Stillie
    87 Shelby Z 2.4 Turbo 9.06@146.05
    82 Rampage 2.4 Turbo 10.14@138.02
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  14. 04-28-2008, 08:08 PM #14
    turbovanmanČ
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    Re: Input shaft breakage

    Quote Originally Posted by Rampage16V View Post
    Yes the shaft has been polished

    I really need to get my head out of the gutter,
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  15. 04-28-2008, 08:28 PM #15
    Speedeuphoria
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    Re: Input shaft breakage

    Quote Originally Posted by turbovanman View Post
    I really need to get my head out of the gutter,
    Funny guy, lol
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  16. 04-28-2008, 09:02 PM #16
    Rampage16V
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    Re: Input shaft breakage



    polished today and is just reaching room temp now

    Dean Stillie
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    82 Rampage 2.4 Turbo 10.14@138.02
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  17. 04-28-2008, 09:05 PM #17
    turbovanmanČ
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    Re: Input shaft breakage

    Is that a stocker or 300m?
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
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    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
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  18. 04-28-2008, 09:57 PM #18
    Speedeuphoria
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    Re: Input shaft breakage

    Its a stocker. Steve was saying on neons.org that he would brake them on 2-3 shifts(mainly the lockup shafts, but should be similar). he said that lowering the line pressure helped(135psi max). I know Rob broke a couple stockers and he was around that line pressure AFAIK.
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  19. 04-29-2008, 09:58 AM #19
    Cliff Ramsdell
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    Re: Input shaft breakage

    Nice job Dean. Scotty broke one in the Shadow a couple of years ago and the break started in the oil hole and snapped clean off also.

    We put another stock shaft in and then went to a stick two years ago.

    Cliff Ramsdell

    Quote Originally Posted by Rampage16V View Post




    Broke trans input shaft carnage. Rampage was making some good power. This was with street tires on it just after shifting into third.

    Any tips on making it last longer. about 7 passes on it with the new valve body.
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  20. 04-29-2008, 11:03 AM #20
    Captain Chaos
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    Re: Input shaft breakage

    Quote Originally Posted by Rampage16V View Post


    polished today and is just reaching room temp now
    Whats your heat treating process?
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