Finally Fried The Tranny
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Vortec 6.0 / 6.2 Liter Discussion, Finally Fried The Tranny in Cadillac Engine Technical Discussion; After 90,000 miles of 550-600hp driving, the 4L65-E finally gave up the ghost (at least 3rd gear, anyway) while getting ...
  1. #1
    T-Dizzy's Avatar
    T-Dizzy is offline Cadillac Owners Fanatic
    Automobile(s): 2003 Escalade EXT 'V', 2006 CTS Sport
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    Finally Fried The Tranny

    After 90,000 miles of 550-600hp driving, the 4L65-E finally gave up the ghost (at least 3rd gear, anyway) while getting onto the interstate last Friday.

    I've got a little time to weigh my options, so does anyone have any experience with/opinions on a) rebuilding it with a kit, b) swapping for a 4L70 or 4L80, or c) rebuilding/replacing with another stock unit and trying my luck for another 50-90k miles?

    Thanks for any advice!

    Tony in MA

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  3. #2
    KCFormula's Avatar
    KCFormula is offline Cadillac Owners Member
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    Re: Finally Fried The Tranny

    If you do a 4L80 please keep detailed notes. Thats what I plan to do when mine goes.
    G/L either way you choose.

  4. #3
    2007XTSDub's Avatar
    2007XTSDub is offline Cadillac Owners Fanatic
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    Quote Originally Posted by T-Dizzy View Post
    After 90,000 miles of 550-600hp driving, the 4L65-E finally gave up the ghost (at least 3rd gear, anyway) while getting onto the interstate last Friday.

    I've got a little time to weigh my options, so does anyone have any experience with/opinions on a) rebuilding it with a kit, b) swapping for a 4L70 or 4L80, or c) rebuilding/replacing with another stock unit and trying my luck for another 50-90k miles?

    Thanks for any advice!

    Tony in MA
    Did you ever get the new tranny? What did you go with?

    Sent from Android.

  5. #4
    nelson480's Avatar
    nelson480 is offline Cadillac Owners Member
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    Re: Finally Fried The Tranny

    I have a 4L65 sitting in my driveway if you want it lol

  6. #5
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
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    Re: Finally Fried The Tranny

    You think the OP did something about a transmission in the last 2 years, 5 months ??

  7. #6
    M5eater's Avatar
    M5eater is offline Cadillac Owners Connoisseur
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    Re: Finally Fried The Tranny

    if you're going to do a conversion, why not a 6L80E? there's a company that does complete conversion kits out there for <$2K plus the cost of the trans for the TBSS guys. I can't imagine the EXT can be that much to adapt.

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