1994 4l60e with a 5.3 swap?

[matt1994]

Hi, im planning on swapping a 5.3L into my 94 Chevy 1500 that originally came with a 4.3L. I already have a complete wiring harness and some other parts from a 99 Chevy truck that had a 5.3.



i found this website that shows what wires i need to make the engine run on its own. i was wondering if anybody knew if this will work good.
http://lt1swap.com/99-02_vortec_pcm.htm

But my real question is i want to keep the 4l60e that i have in the truck now that was originally behind the 4.3L. since it was replaced not to long before the 4.3 went out. and i was wondering how i could make this work. i know the transmissions changed after 94 and i might need the flexplate spacer im mostly worried about the wiring can i hook it up to the harness i bought? If not can i modify it to make it work or do i have to buy different transmission? I don't have enough money to buy a stand alone computer and that wouldn't make sense since they are sooo expensive i could buy a 99 4l60e for the same price. Any help would be greatly appreciated. thanks.

[Z06vet]

It is not a direct bolt up to your trans. You will need a different flex plate & spacer. I am not sure on the wiring if the plugs are the same & if the 99 computer will run the older 4l60E. Since your trans came from V6, I would go with a 99-up V8 truck trans. The V6 trans will likely not last behind the 5.3. Add the cost of making the 94 trans work & the headache of possibly issues with wiring, and you will be ahead of the game if you sell your V6 trans and buy the correct trans. Just my opinion. Scott

[tfi racing]

LT1swap.com is a good source for wiring diagrams,program and info.As posted above you will be further ahead ditching that 94 4L60E,the electronics are not compatible,however it would work physically with the correct flexplate/spacer combo.I swapped a 6.0 into my 98 4x4,
nothing terribly difficult about it,but it is a lot of work and not inexpensive,but what an improvement over that weak suck 5.7 Vortec!

[ORBandit]

The internals are slightly different. From what I've found most of the wiring crosses over, there are one or two that do not and some how aren't necessary. There were a handful of S10 guys I know that have done it. Sometime soon i'm going to convert my 94 OBD1 over to a 2 system using syty parts and a 0411 PCM. I wish I could find the link i had for you.

Wow, old thread. Sorry for the bump. Was looking for similar info.