swapping a 700r4 to 4l80e

[jeffmarble]

maybe im not searching right but i couldnt find much info on swapping a 700r4 to a 4l80e. i found a great deal on a drivetrain combo via craigslist 383 with edelbrock multi fuel injection and serpentine setup. 4l80e and np241. will i need to lengthen or shorten driveshafts? and crossmember location will it stay the same? will anything change with the transfer case ive read there about the same. anything else will be a great help thanks. oh heres the link of what im gauging interest in.http://anchorage.craigslist.org/pts/2099452440.html

[lindstromjd]

It's pretty much the exact same thing, only the 4l80e is electronically controlled instead of by a TVS cable. None of the lengths will be any different. As far as changing transfer cases... from what will you be changing? The NP241 out of a 91 truck is going to be a driver's side drop. You can find them in passenger side drops, but it's hard.

[cableguy0]

The 4l80e is longer than the 700r4. The 4l60e shares the same dimensions as a 700r4 in the earlier units. heres a chart with tranny dimensions. http://www.tciauto.com/Products/TechInfo/trans_dims.asp

[jeffmarble]

luckily i have a driverside loop crossmember in my garage i mistaked for the correct one for my truck. talked to him he'll include crossmember driveshafts and exhaust anything i need hes scrapping the truck

[BigBlocksRule]

I assume the Edelbrock computer will run the 4L80E? Otherwise, you're gonna need something to control it...

[Jonboy]

If it is running and driving already, it should be controlling the trans anyhow. 1991 was the first year for the 4L80E in the heavier trucks, so the Edelbrock system either used the stock ECM or piggybacks it somehow. The ad says it includes the harness and everything, so you should be good. Try to grab the cluster, too. It is teh electronic one, to save a ton of hassles.

[jeffmarble]

i will he said anything extra i need for the swap since hes scrapping the truck. i doubt fuel tank will work so ill need later model tanks and fuel sending units than ill just use the pump hes giving me. im waiting for a vid of the engine running right now hes about 300 or so miles away from me so i wanna make sure it at least sounds like its running decent

[kevinr1970]

I can't view CL ads here from work so I can't see the details, but I assume this is in a Crew or Burb square body?

I remember looking at a '91 crew 2wd diesel a few years ago that had an OD tranny.
I was told by someone here (ElGracho?) that it was like a one year only thing and was a desirable tranny as it was not electronicly controled. It was not a 4l80e, but a 4l80; the "e" for electronic.
Not sure if that was only in the square body applications, or all GM trucks that year though?

[clinebarger]

The Edelbrock MFI coversion for TBI motors uses the factory computer.
There is no such thing as a 4L80 only 4L80Es. If there was they whould be very sought after.

[ghettoluxury]

Originally Posted by jeffmarble

i will he said anything extra i need for the swap since hes scrapping the truck. i doubt fuel tank will work so ill need later model tanks and fuel sending units than ill just use the pump hes giving me. im waiting for a vid of the engine running right now hes about 300 or so miles away from me so i wanna make sure it at least sounds like its running decent

I would grab the tank also if it is a TBI motor than the sending unit is different. The fuel pump is attached to the sending unit and sits inside of the tank. As long as you have a long bed it will work.

[actconstruction]

As far as the 4L80 non electric, you can, however do a valve body to make one from a 4L80E, or alternatively, start with a 4L60 and upgrade some parts. Shouldn't be hard to find a kit.