1991 K30 4l80E or NV4500 behind Cummins?

[nekkidhillbilly]

Originally Posted by Dieselwrencher

The NV4500 will be the cheapest and easiest. The 13 speed fuller would be cool, but what a waste in a pick up. You'd get tired of shifting that thing for sure. Not to mention I'm sure it would suck to work on. I put a 8V92 and a 10 speed in a 86 K30 and it was a really tight fit. Sucked to work on once I got everything in there. The 4L80E can be built to handle it but will be expensive to get behind the cummins. You will need an adapter and flex plate, and a controller and a starter. Probabaly around $1700 just to get the trans mated to the cummins. If you want to go with the fuller, I do have one bell housing left that will work for one.

truck is oem 4l80e truck that was oem diesel has the controller for the 4l80 already.

[Dieselwrencher]

Originally Posted by nekkidhillbilly

truck is oem 4l80e truck that was oem diesel has the controller for the 4l80 already.

That'll only work if you can transfer the proper inputs from the GM diesel to the cummins. The 4L80E needs throttle pos, and engine speed, and I'm not sure what else. You could make brackets and modify to your needs I guess. I haven't messed with a 4L80E behind one before. I have helped with a couple, but it wasn't as easy as use the stock ecm on the truck because the trucks didn't have them in them.