The continuing saga of my tranny problems...please help!
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HT4100 4.1, 4.5, 4.9 Discussion, The continuing saga of my tranny problems...please help! in Cadillac Engine Technical Discussion; Well guys, I seek your advice once more. The latest development in my tranny is that it now has trouble ...
  1. #1
    ACDC686 is offline Cadillac Owners Member
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    The continuing saga of my tranny problems...please help!

    Well guys, I seek your advice once more. The latest development in my tranny is that it now has trouble shifting from 2nd to 3rd. It is almost as if it gets stuck in neutral for a bit...that is how bad it is slipping. It also shudders pretty bad sometimes when it finally hits 3rd (this symptom isnt present every time). I've checked the fluid and it is at the proper level, so that is ruled out. Im pretty sure that the problem is internal, but I would like to avoid a rebuild, so I'm willing to try what you guys suggest.

    P.S. I drive a 1990 Coupe Deville with 210k miles. And any help is much appreciated!

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  3. #2
    awadecki is offline Cadillac Owners Enthusiast
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    Re: The continuing saga of my tranny problems...please help!

    At that mileage, you're probably due for a rebuild. Maybe try some LubeGard?

  4. #3
    CadiJeff's Avatar
    CadiJeff is offline Cadillac Owners Connoisseur
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    Re: The continuing saga of my tranny problems...please help!

    awadecki is right the trans is due

  5. #4
    carnut is offline Cadillac Owners Master
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    Re: The continuing saga of my tranny problems...please help!

    First place to start would be to remove the trans pan and look for clutch material and bits of metal. If nothing is obvious, change the filter and fluid add some LUCAS trans fluid additive and hope for the best. If anything other than silver dust type material is found make an appointment with a trans shop! LUCAS is a well known oil additive company. I've used their eng oil and trans oil additives for years with good results on older hi mileage vehicles.

  6. #5
    Edahall's Avatar
    Edahall is offline Cadillac Owners Enthusiast
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    Re: The continuing saga of my tranny problems...please help!

    The symptom you're describing sounds like shift flare. Most likely, the clutches are worn out and the transmission is due for rebuild. If you mechanically inclined, you can rebuild these transmissions yourself. It'll cost around $100 for the rebuild kit and another $100 for a rebuilt torque converter. The last one I rebuilt myself took me about a weeks worth of evenings after work to rebuild.

  7. #6
    z06bigbird is offline Cadillac Owners Connoisseur
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    Re: The continuing saga of my tranny problems...please help!

    Rebuild it yourself???? What the heck are you smoking?

    Ed

  8. #7
    illumina's Avatar
    illumina is offline Cadillac Owners Connoisseur
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    Re: The continuing saga of my tranny problems...please help!

    Quote Originally Posted by z06bigbird View Post
    Rebuild it yourself???? What the heck are you smoking?

    Ed
    These trannies aren't that hard to rebuild at all. Mine is almost done!

    4T60-E, 1991 Cadillac Seville...

    3.33 FDR, Engineered Performance limited slip differential, Trans-Go shift kit, Borg-Warner red clutches/kolene steel plates, upgraded 2nd clutch housing, upgraded 1-2 roller clutch, STS ECM with a Superchip (which I found in the junkyard no less!), and a 2300 stall converter.

  9. #8
    johnplara is offline Cadillac Owners Fanatic
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    Re: The continuing saga of my tranny problems...please help!

    Illunima, you got to make a full list of your rebuild goodies for the tranny, I got to get started again, now that the weather finally broke around here, on my beast. Now onto my problem solving.

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