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4L80E?

Discussion in 'The Garage' started by CHEVY 4WD, Nov 15, 2003.

  1. CHEVY 4WD

    CHEVY 4WD 1/2 ton status

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    Ive almost decided a 700R4 isent gonna hold up(was looing at the stage III from BTO) I THINK I really want a 4L80E, I know ill need a stand alone computer, and jet and TCI makes one but i cant find a price or any other info on them. What else is involved? It goen in to a 84 K10 (700R4/208) are there certain years or styles to look for (cant afford a BRAND new one) and can I use my NP208? one member is selling one from a 94 and has a 241 adapter but Im not sure if thats the same adapter for a 208, 1 last thing how much more does one of these weight compared to a 700R4? /forums/images/graemlins/confused.gif
     
  2. sled_dog

    sled_dog 1 ton status

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    can't help you with anything except the 208 thing. 241 and 208 are transferable adaptor wise so that one with 241 adaptor will work fine.
     
  3. SUBFAN

    SUBFAN 1/2 ton status

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    IIRC that stand alone computer is like $900, not cheap or this swap would be more common....
     
  4. CHEVY 4WD

    CHEVY 4WD 1/2 ton status

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    IIRC??? I dont see why the swap isent more popular my stange 3 700R4 i was planning on ordering(still dont have enough$$$) was about $1900 but of course thats a BRAND new trans
     
  5. 90blzr

    90blzr 1/2 ton status

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    Contact Ironman on this site....he had a 4L80E built by JET thats BRAND NEW, he never ran it. He was trying to sell it, he parted out his project truck it was going in.
     
  6. CHEVY 4WD

    CHEVY 4WD 1/2 ton status

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    another question... are all 4L80E's the same? or are there certain ones that are stronger and or 2wd and 4wd or anyother models?
     
  7. beastk5

    beastk5 Newbie

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    4l80e cpu

    got summitracing.com thet have a cpu for the 4l80e for 600 bucks
    its made by tci
     
  8. Emmettology 101

    Emmettology 101 3/4 ton status

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    What swayed you away from the 700r4?
     
  9. 1979jimmy350

    1979jimmy350 1/2 ton status

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    you can get a full manual valve body for the 4l80-e
     
  10. Supergas

    Supergas 1/2 ton status

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    :confused: Contact Hughes Performance Transmissions in Phoenix. They build that 4L80E & can answer all questions.. I don't know why everybody is blowing the 700R4 up so much. I have had one in my 71 for 3 years with no trouble plus I ran one in my 27T Supergas race car for years with no trouble... You just need to spend the money upfront for a top of the line build.

    My 2c....

    Supergas.....
     
  11. kyser_soze

    kyser_soze 1/2 ton status

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    The 2wd and the 4wd have different output shafts, but I don't know the spline count.
     
  12. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    THey aren't. They are just more common than most other trannies in the blazers. Plus most of the grenaded trannies you read about are ones with tons of miles going out from wear and old age, or a new built motor finishing one off from a long life. The majority of built Th700's is quite rare, from my experience.
     
  13. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    If I am gathering right you plan on buying the stand alone computer and finding a good used 4L80E. Right?

    I highly doubt a 4L80 is any stronger than a stage 3 th700R4, infact if I had to rely on one behind big power(near the stage 3's limit) I would take the Th700R4. I think the HP rating that a stage 3 has is more than an used, stock 4L80 can handle.
     
  14. HarryH3

    HarryH3 1 ton status Author

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    Open 'em both up and take a look inside. ;) The 4L80E has larger shafts, gears, clutches, etc. The main shaft also has an extra center support to limit flex, where in the 700R4 it's only supported at each end. The 4L80E design is based on the nearly bulletproof Turbo 400. It's biggest drawback is that it has a taller first gear than the 700R4.

    I contacted Bowtie Overdrives about putting one of their built 700R4's into a 4WD Suburban, behind a mild 454 planned for towing duties in the Rockies. They recommended the 4L80E for that application. :cool1:
     

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