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Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
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  1. #1

    Default Tranny Question for Yukon & Suburban

    Im in the market for a used 2004-06 Suburban or Yukon XL. I have noticed many postings (on other websites) from owners who experienced many transmission issues after only 60,000 miles. I have to say that I am shocked. Is the AWD Yukon Denali not built as tough as the typical 4X4 Yukons or Suburbans?

  2. #2
    Jr. Apprentice
    Join Date
    Oct 2010
    Location
    Lanaudière
    Posts
    14

    Default

    I dont know, but when i bought the Tahoe, i was interested by Cadillac Escalade and 3 different dealers said to me not to buy Denalli or Escalade because i am working with my truck.
    They said i needed the 2 speeds transfer case with the regular transmission because i am pulling trailers on jobs with it.
    Chevy Tahoe 2007 pure stock 4wd 3.73 5.3
    Chrysler Cordoba 1975 400 4bbl first and only owner

  3. #3

    Default

    I am not sure why either of you have gotten the information you have. The GM half-ton trucks usually recieve the 4L60E, while 3/4 and 1-ton trucks get the 4L80E. Both are very reliable transmissions, though for obvious reasons, the 4L80E is stronger.

    I also don't get why the dealer would say you needed a 2 speed transfer case unless these trailers you tow are through lots of thick,deep mud. The low range in the transfer case is only good up to around 15-25mph.
    Christopher

    1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4.10 gears 200K miles
    2005 Saturn ION-2 Stock 277K miles
    1982 Bronco, 1993 Bronco (sold), 1971 M35A2 Deuce and a Half



    There are 10 kinds of people, those who understand binary, and those who dont...

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  4. #4
    Jr. Apprentice
    Join Date
    Oct 2010
    Location
    Lanaudière
    Posts
    14

    Default

    The denalli and the escalade get another tranny who has the 4weels drive included in. It is not the same tranny then the regular 1500 and tahoe -avalanche.
    I dont know what is the model number.
    And the Tahoe with this tranny is good only for 3500 or 5000 pounds of trailer now.

  5. #5

    Default

    I think what Gatito is talking about, and he can correct me if I am wrong, is that the Escalades, and Denallis have AWD, wile the regular Suburban, and Youcons have real 4 wheel drive, but I have no idea if this makes a difference to the transmission, do the Escalades, and Denallis have some type of transfer case, or does the tranny take care of it all?
    Terry

  6. #6
    Jr. Apprentice
    Join Date
    Oct 2010
    Location
    Lanaudière
    Posts
    14

    Default

    The tranny takes care of it all and the dealers said that it is not made to do heavy work like the regular tranny.
    But i cannot say if it is true that it is not as good as the tranny they put with the transfer case.

  7. #7

    Default

    The Denali/Escalade actually have a slightly stronger transmission with a higher torque rating called the 4L65E. The 4L65E has a higher torque rating because the Denali/Escalade has the 6.0L V8. The Denali/Escalade also use a NV149 AWD transfer case.

    97 Chevrolet Suburban K1500 5.7L
    78 GMC High Sierra K1500
    Fat, drunk, and stupid is no way to go thru life.

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