5.3L LS4 swap into a 95 Oldsmobile Cutlass Supreme SL

[JulienStocola]

so

this is my first post here on this forum and i don't quite know what to get out of it, as you saw I'm attempting to get all pieces together to get a 5.3L LS4 with the transmission, all wiring ecu tcm is all connected, the entire subframe setup was taken down from a impala to swap into my 95 Oldsmobile Cutlass Supreme SL. Being a obd 1 car i don't know if its only the ecm/ecu that runs the tranny or if there's a bcm ( body control module) that goes with it, that being said this car was given to me as a gift from my grandfather who recently passed, so if you guys are tryna convince me to start with something else forget it, ive seen the motor go into the car already and the guy who posted it here was even brave enough to get a 4t80 inside along with it.

my main question is what ecu and standalone kit would be best used for this setup as i only see all other ecu's being compatible with the other LS engines instead of this one

 

 

Edited May 23 by JulienStocola

[Black92GS]

Welcome! That sounds like a somewhat ambitious swap. A 95 would have had the 4t60e, which has the shifts controlled electronically. Outside of physically fitting in the engine bay, I can’t see any of the existing electronics functioning with an LS4. 
 

On the flip side…it’s an LS4. I know there are aftermarket companies that make ECMs that can run LS series engines, as well as standalone TCMs specifically for the 4T80e, so finding the parts to run the powertrain should be possible, and likely relatively easy as well. 
 

Best of luck! While ambitious….it would be awesome to see something like this completed!

[55trucker]

Lol.....you're not the first to attempt this swap......

 

[Bake82]

55 linked some w-body specific links.  

 

You may also check into the Fiero groups and see how their wiring is done and which PCM's they use.  If you're on Facebook go to this group https://www.facebook.com/share/g/16TmFr1XSe/

 

They specialize in Fiero's, but he's posted a ton of info on wiring and PCM's.  the concept will be the same, even if the wiring plugs to match the rest of the car harness don't line up.  

 

[JulienStocola]

21 hours ago, Black92GS said:

Welcome! That sounds like a somewhat ambitious swap. A 95 would have had the 4t60e, which has the shifts controlled electronically. Outside of physically fitting in the engine bay, I can’t see any of the existing electronics functioning with an LS4. 
 

On the flip side…it’s an LS4. I know there are aftermarket companies that make ECMs that can run LS series engines, as well as standalone TCMs specifically for the 4T80e, so finding the parts to run the powertrain should be possible, and likely relatively easy as well. 
 

Best of luck! While ambitious….it would be awesome to see something like this completed!

I promised myself my this swap getting done, time isn’t the problem, once I have that entire subframe setup engine tranny wiring ecu tcm all in one it will be much easier to show how it’ll be started on 

[GnatGoSplat]

That's a daunting swap!  Wish I had the balls to do it, but I draw the line at cutting away at a unibody frame that likely wouldn't have won any 1995 IIHS safety awards in the first place.

You're all good BCM-wise, there isn't one.