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4L80 swap?

Discussion in '1992-Present Chevy & GMC models' started by beater_k20, Jul 21, 2004.

  1. beater_k20

    beater_k20 Banned

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    what is it going to take to put a 4L80 in my 91 K1500? it has a 4L60 (not 4L60E) in it now. also, what transfer cases will bolt to this trans? i'm planning on an SFA swap eventually, and may need to switch transfer cases from my drivers side drop 241 to something else.
     
  2. sled_dog

    sled_dog 1 ton status

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    I'd stay with the 700R4 if I were you. I've had 2 trucks with 4l80es and not been impressed with either. high first gear ratio and the torque converter is really heavy on these things, stock small block you are dogging the motor a little to be running that trans. A well rebuilt 700R4 is a plenty good option in my opinion.
     
  3. HarryH3

    HarryH3 1 ton status Author

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    Re: 4L80 swap? *DELETED*

    Post deleted by HarryH3
     
  4. sled_dog

    sled_dog 1 ton status

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    yeah there was no 4l80 only 80e, they make standalone computers for them but thats even more $$
     
  5. beater_k20

    beater_k20 Banned

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    what year did the 4L80E start? why cant i just find a donor truck with a TBI 5.7 and swap the harness/ecm?
     
  6. sled_dog

    sled_dog 1 ton status

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    you could. hmmmm damn I'm pretty certain the 4l80e started in 91. Not sure if thats true or not(think it may have been earlier) but I know it was around at that time.
     
  7. jac6695

    jac6695 1/2 ton status

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    I am pretty sure the first year of the 4L80 (91?) was non electronic. The company I worked for at the time had 4 or 5 G30's with first year 4L80's and all of them went through transmissions like crazy. Took GM a couple of years and electronic control to make them durable.

    One of the biggest reasons I advised you to get a heavier truck was because the swap to a 4L80E will not be cheap.
    I would suggest looking for a salvaged Vortec 350/4L80E/NP241 combo (or whole truck) to swap into your truck. If you were to get the whole truck, you would have 3/4 to rear springs and a 14 bolt rear (semi float, good enough). I would still advise no lift for better handling and less wind/road resistance, but 4" lift and 33's wouldn't be too bad.

    The Vortec would be good power for what you want to do and having a whole truck would get all of the parts needed. I have seen wrecked 97-99 2500 trucks go for $800-1000.00 around here (I4x4 from this board bought a whole truck for the Vortec/NV4500/NP241 w/125,000 miles and frontend damage for $800.00). /forums/images/graemlins/thumb.gif
     

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