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Thread: ?'s about the 4L80E trans

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  1. #1
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    ?'s about the 4L80E trans

    Apparently the 4l80 that I have now came out of a 98' model pickup and has a bolt on yoke.
    I really want to buy the 99' and newer 4l80e,

    Question is most of the newer ones I see has slip yokes and I already spent over $400 on a custom driveshaft and dont really want to have to buy a new one...
    so will a bolt on yoke fit on an output shaft set up for a slip yoke?

    And does it have the hole for the bolt

    Also how can I tell what yr trans I have, I dont see any #'s stamped into the case????
    89' GMC RCSB 6.0L LQ4, T56, 4.56 Gears

  2. #2
    Join Date
    Aug 2005
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    Don't know the answer to all your questions.

    The 2 80e's I have 03 and 05 are slip of course. They do not have a hole in the output shaft.

    These 2 trans have a tag riveted onto them with a date stamp for year and month manufactured.




    Last edited by KySilverado; 07-13-2009 at 09:56 AM.

    03 Chevy ECSB, Z71, 6.0L(LQ4), Maggie @ 9PSI, 4l80E, PI Vig 2800, Detroit True-Trac, 4.10, 90mm LS2 TB, Meth Injection, HSW Dry N20, LPE GT7 Cam, 918 springs, Dynatech LT's, Hi Flow cats, custom stainless exhaust, DMH cutouts, DJM Suspension Drop, E-Fans, AirAid, HPT 2Bar SD Tuned, 11.68 @ 114.2

  3. #3
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    I have a 2001 and a 98, 98 was bolt on output and 2001 is slip style. Both have the bolt hole and are the same exact length. You can bolt the older style yoke to the newer style with the tapped hole but you may have to pack some silicone on the end of the output shaft when you bolt it together to make it seal since you won't have a seal on the output shaft like the early model.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  4. #4
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    Just out of curiousity how hard is it too rebuild these units. I can rebuild 700r4's all day long, so I hope it isnt much harder.

    Also is $500 too much for a 2001 4l80e with 117,000????
    89' GMC RCSB 6.0L LQ4, T56, 4.56 Gears

  5. #5
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    Quote Originally Posted by Kros383SS View Post
    Just out of curiousity how hard is it too rebuild these units. I can rebuild 700r4's all day long, so I hope it isnt much harder.

    Also is $500 too much for a 2001 4l80e with 117,000????
    You must be talking about the one from lkq. I was gonna order that trans tommoro....lol
    2000 Silverado ECSB- 5.3 CAI, Pacesetter LTs, ORY- Pipe, Magnaflow XL, E-fan, Ported T/B , Nelson Tuned, Built 4l60e, Circle D Stall, 3.42s G80, 2-4 Drop, Hertz Highs, Rockford 501s

    2004 Buell XB12s

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  6. #6
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    Quote Originally Posted by WARLOCK View Post
    You must be talking about the one from lkq. I was gonna order that trans tommoro....lol
    Damn man I hope not cause thats the cheapest I can find one.

    and I was gonna go take a look at it today hopefully this morning



    If it isnt that hard to rebuild I might just rebuild my 4l80e I have now, even though its the older style.
    89' GMC RCSB 6.0L LQ4, T56, 4.56 Gears

  7. #7
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    They are about the same but not similar in construction. I'd say the 80 is easier although I've been in a lot more 60's.

  8. #8
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    80e is much easier to build
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  9. #9
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    Quote Originally Posted by GasGuzzler View Post
    I'd say the 80 is easier although I've been in a lot more 60's.
    Thats gross Nathan....leave the old ladies alone!
    Vortec Performance Tuned
    LQ9 built 4L60 LTs and a billion miles on the speedo!

  10. #10
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    No YOU are gross.....and your boyfriend is magically on right now too...

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