4l80 questions

[b454rat]

I found a local guy selling a rebuild 4l80 with harness and deisel controller for $650. It's out of a 91 van, I'm curious how good the 91s where?? Heard alot of them going bad, and isn't a good core to rebuild, something about the later model innards are a better design or something.

Also what else would I need to run this?? Or is everything already there?

 

[Slapperbar]

The trans is fine, the wiring harness and pigtail are junk. Basically the wiring socket leaks tranny fluid into it and shorts it out. You'll need, iirc, a '93 up pigtail for the chassis harness and the internal harness to remedy the problem.
That's what's on mine.

 

[b454rat]

Should be able to get one of those easy enough. Any mods to the TBI for the TPS or any other sensors????

 

[Slapperbar]

Nope.

 

[b454rat]

Might have my 454 sold, so if that is the case then porlby just get an ECM off a truck that has the 350/4l80 combo, those are starting to show up in yards now....havta wait and see what happens....

 

[b454rat]

Would I have to do anything to this trans to make it work right with a gas over deisel?? Want to get one, this is close and rebuilt, but dont' want to get it if it's not gonna work right....

 

[johnnychimpo]

I found out today that little yellow buses (GM diesel) are another source for the diesel 4l80e controllers.

 

[b454rat]

The tranny that I'm looking at comes with that ECM,but not sure if
i just hook it up and go or what....

 

[johnnychimpo]

As long as the the vehicle it's out of had mechanical injection (up to '94 I think) you should have what you need.

 

[b454rat]

Said it was out of a 91 van...emailed him to see if he still has it...