I've got a '93 4L80E from a 6.5 turbo diesel 2WD C2500 with the manual injector pump. I've got the trans PCM/ECM and wiring from the trans to the ECM (simplest 4l80e pcm, right). I'm considering putting a 2002 4.8 motor in front of this tranny in a custom 2WD vehicle. The 4.8 is from a Tahoe with an automatic (4l65e?).

1. Will the tranny bolt up? Input shaft length issues? Crank bolt pattern?

2. Can I use the tranny controller to control the trans and the engine controller to control the engine, keep them separate?

3. Should I switch to a manny tranny ECM for the engine? My understanding is that the diesel tranny controller needs some sort of rpm signal from the motor (hooks to a sensor that goes in the distributor/vacuum pump hole in the 6.5 block).

4. Is there any way to control the 4L80E with the 4.8 ECM?

Any ideas?

 

Yes, as long as you can do some tuning with HPTuners or EFILive (and the 4.8 PCM has an auto segment on it).

 

What about question #1? Will it bolt up?

 

It will bolt up like any older GM trans, 5 match up, but 1 will be missing.

 

How about the length of the input shaft and the crank bolt pattern?
I've read that there are input shaft length issues when using an older manny tranny with a gen III V8. Is that an issue for automatics?
Brian

 

It depends on the converter. If you are having a converter built custom, just talk with your converter guy. If you use a stock converter, its the same as bolting a TH350/400 (look thru the stickies).