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Thread: How to 4L60E to 4L80E trans swap

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  1. #1
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Yeah, after rebuilding my 60e five times I had enough. Anyone need a 60e with some really good parts in it and a busted forward sprag?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  2. #2
    Join Date
    Mar 2003
    Location
    San Marcos Texas
    Posts
    4,393
    Quote Originally Posted by RedHeartbeat View Post
    Yeah, after rebuilding my 60e five times I had enough.
    And one 80E! LOL!
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  3. #3
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    So true, that 100k+ unit wore out. Now I have a fresh one that has been taking a beating so far. Theres nothing like breaking them in right.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  4. #4
    Join Date
    Jul 2007
    Location
    Tempe, AZ
    Posts
    66
    I did the 80e swap in my RCSB you will only need a shorter slip yoke to make the drive shaft work and you can get it online pm me if you need more info.






    Last edited by Low_LQ4; 06-16-2008 at 07:36 PM.
    A.J.

    RCSB GMC SIERRA 00

  5. #5
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    TCI makes a controller but its not cheap. The diesels had a standalone 80e controller but you have to wire it up and I know its been done before. I'm not sure how you'd program it, though.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  6. #6
    Join Date
    Sep 2007
    Location
    Broken Bow, OK
    Posts
    1,434
    The Compushift is nice, but over $1000, that's right 3 zeros.
    Since he is running a TBI 350 couldn't he use a harness and ECM from a 93 3500 with the TBI 350 and 4L80e? Just a thought.
    As far as the diesel ECM, it would be from a 91-93 6.2 and 6.5 truck. Not sure about all the wiring involved. Apparently these ECMs can be kind of pricey too, since a lot of people realize what they can be used for.

  7. #7
    Join Date
    Sep 2010
    Location
    frisco, tx
    Posts
    10
    Quote Originally Posted by PitchBlackC3 View Post
    The Compushift is nice, but over $1000, that's right 3 zeros.
    Since he is running a TBI 350 couldn't he use a harness and ECM from a 93 3500 with the TBI 350 and 4L80e? Just a thought.
    As far as the diesel ECM, it would be from a 91-93 6.2 and 6.5 truck. Not sure about all the wiring involved. Apparently these ECMs can be kind of pricey too, since a lot of people realize what they can be used for.
    kinda speaking spanish to me as far as trannies go, but i gotta do something with this 700r4, and i really need the overdrive for work and hauling the race truck to the track and back, its a torque monster IMO, in other words, its a gu2 rear end(2.73, yeah, 2.73) and its walking 03-07 hemi pickups haha and
    4 bolt main TBI 350
    built 700R4
    casting#916 heads
    advanced timing to 12.5 degrees
    and that wraps it up for now!


    soon to come, high rise intake with nitrous plate, bigger cam, turbo 350 or 400 tranny with a floor shift, wet shot of nitrous(somewhere between 125 and 225) 10 or 12 bolt 373 with a locker, 20 inch chip foose torque thrust wheels, new paint probably metallic jet black, corbeau buck seats

  8. #8
    Join Date
    Nov 2008
    Posts
    10
    OK. I've been researching various diagrams of the PCM and transmission. If I use the blue side of the PCM and tie the #72 and 34 together and ground them, am I correct in thinking it will make the PCM read that the transmission is set to neutral (or was it park?). Either way, that is what I need...a "P" or "N".

    Thanks

  9. #9
    Join Date
    Apr 2008
    Posts
    1
    What size fitting did you use to convert the hard line to the AN fitting?

  10. #10
    Join Date
    Mar 2006
    Location
    Phoenix, AZ
    Posts
    620
    For those that are comfortable cutting and splicing wires or re-pinning a connector, you can do this method instead of spending the extra coin for a conversion harness. You'll still need the harness for the second VSS, but this takes care of the main round harness that plugs into the side.



    2006 GTO M6 Brazen Orange
    2006 Silverado CCSB Duramax


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