4.8L/6L90E swap???

[87Skier]

Originally I was going to do a 5.3L from a 03-06 truck, but I haven't been able to find a good motor. Ended up finding a newer engine out of a 2013 Chevy Express 2500 with a 4.8L and 6L90E. It has about 50k miles, and for the engine, transmission, harness and computer he wants $2500.

It sounds like a decent deal to me, since the older 5.3's seem to be up around $1000 for just the engine if it has less than 150k miles.

I can't say I care all too much about power output, but I'm not sure if it will work with what I have. I'm trying to find all this out in the next couple days before it's gone.

First, it is a 2wd 4L90E, which I've heard has a completely different output shaft (36 spline instead of 4wd 29 spline). Since I need it to work with my np205 in my 72, this is an issue. Advance Adapters make a kit for the 4wd version but not the 2wd. What can I do about this?

Second, will it fit in my 72 jimmy without having to cut it to pieces?

Third, does this transmission still have a cable/linkage to shift from P/R/N/D?
Does it have manual shift controls for all the lower gears as well, or is this electronically controlled via the computer/inputs? Could this be run from a standard 72 column shift that has P/R/N/D/L2/L1 assuming that last few gears are not reachable?

Fourth, the engine is flex fuel and vvt. Does this make any difference to being able to swap the engine? Does the computer need to be told to ignore the fuel sensor?

Lastly, is there anything I should know before considering this engine and transmission?


I'm going to use a 205. I will not change my mind, and it will dictate the course of the engine swap.
Engine power isn't a concern and I'm leaving it stock and looking for better mileage over power.
The engine code is L20, and transmission code is MYD.

If the transmission won't work, should I still buy the engine? It would be $1500. Could I source a good used transmission for $1000? If so, I haven't seen one.

Thanks!