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Does anyone run 4L80-E's?

Discussion in 'The Garage' started by Flexy K20, Jan 14, 2003.

  1. Flexy K20

    Flexy K20 1/2 ton status

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    Does anyone run 4L80-E\'s?

    The 4L80-E is supposed to have the same strength as a TH400 but with overdrive. I was just curious because if people are having trouble keeping their 700-R4 alive why not run a 4L80-E? I was just curious. Later
    -fLeXy
     
  2. bigbluek20

    bigbluek20 1/2 ton status

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    Re: Does anyone run 4L80-E\'s?

    The biggest challenge of the swap is the electronics. Either you find a computer from a diesel pickup or buy one from TCI (about $800, I think).

    Then you need a speed sensor. If you get an earlier 4l80e, from what I have been told, you can install a speed sensor in the tranny. I know the 96 I put in my truck did not have the reluctor ring for the output speed sensor. The best method I could find for a 40 pulse per revolution VSS was using an NP241 from a 91 Burb.

    From the 700R4, you would need to modify the transfer case anyway. You would need a 32 spline circular 6 pattern (TH400 / later SM465's).

    BTW, the new combo is a little longer... had to lengthen the front shaft and move the mounting crossmember back, too. Also had to fab a mount for height.

    IMHO, I would seriously consider a built 700r4 or skipping the overdrive and doing a TH400. I only went to one because I was installing it along with a Vortec 454 (in my 82 K20).

    Hope this helps.
     
  3. azblazor

    azblazor 1/2 ton status Premium Member

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    Re: Does anyone run 4L80-E\'s?

    Got one in my K5. And one in the garage going into a 78 suburban or a 86 K30.
     
  4. Flexy K20

    Flexy K20 1/2 ton status

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    Re: Does anyone run 4L80-E\'s?

    How do you like it, has it been a good tranny? What is the first gear ratio on it? Thanks
    -fLeXy
     
  5. azblazor

    azblazor 1/2 ton status Premium Member

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    Re: Does anyone run 4L80-E\'s?

    I love it. I had one in a 93 suburban and it went 200k towing alot.
     
  6. Sandman

    Sandman 3/4 ton status Author

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    Re: Does anyone run 4L80-E\'s?

    If I ever blow my TH350 I think I'd look into this option. Its a popular swap for the older muscle cars.
     
  7. azblazor

    azblazor 1/2 ton status Premium Member

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    Re: Does anyone run 4L80-E\'s?

    </font><blockquote><font class="small">In reply to:</font><hr />
    What is the first gear ratio on it?

    [/ QUOTE ]
    2.48, 1.48, 1, 0.75
     

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