3rd Gen 3S-GE swapping information thread, Use your old harness w 2/3gen swaps? Options

[KAOS]

Next large task on my agenda:

Figuring out the axels. I was told at one point that we could just use the 5SFE axels in the 3S - which is all good with me, but what about the driveshaft bearing on the passenger side?

Meaning, will the 5S driveshaft work in the 3S bearing mount?

[mi645]

id ur using s54 everything will bolt onto the 3sge even the carrier bearing. only the e56 or e153 u need different components

[KAOS]

Anyone make any progress on their swaps?

[KAOS]

Anyone who lengthened their harnesses, how much did you have to lengthen it by? I'm thinking around 4 feet should do the trick, but I don't know...

Thoughts? Where did everyone go on this topic?

[richee3]

Whoa, easy! I extended mine about 2 feet and it was just a little bit too much. I'd rather have just a little bit too much than not enough.

[Batman722]

I've heard between 18"-24" is ideal.

[enderswift]

for what it's worth here's what I did for my 3s swap, not sure how this compares to what would be required for a beams harness:



Its extended by 42"


It runs around the clutch reservoir and along the firewall, suspended from the strutbrace, before entering the factory harness opening on the passenger side.

I have had zero issues with clearances or anything else like that.

If you're planning to do this be prepared to extend a coaxial cable, and to recreate some cable shielding. 3M sells shielding tape, but it's possible to make your own with a litte extra work.

This post has been edited by enderswift: May 15, 2014 - 3:20 PM

[mi645]

i didnt extend mine, i simply took all the factory tape off re routed everything tape it back up, put the shields on and thats about it, i only extended igniter plug wire and intake temp sensor.
didnt touch the evu plug side. pretty simple.

[KAOS]

i didnt extend mine, i simply took all the factory tape off re routed everything tape it back up, put the shields on and thats about it, i only extended igniter plug wire and intake temp sensor.
didnt touch the evu plug side. pretty simple.

Ok, I've taken the wiring harness apart as you said and you're right, looks like I can move the majority of the wires so that the harness will reach the stock ST204 firewall hole, and then just extend the ignition and temp sensors.

Did you change any of the pinouts at the fuse box in the engine bay? Or any of the pins at the ECU? Or was it all plug and play???

This post has been edited by KAOS: May 27, 2014 - 11:35 AM

[mi645]

everything is plug and play, and yes the harness reaches with no problems just make sure u put new shield and wiring tape for safety, and no u dont have to re pin a single thing if ur using the ecu that came with the engine and harness off the 3sge. if u need anything else let me know

[KAOS]

everything is plug and play, and yes the harness reaches with no problems just make sure u put new shield and wiring tape for safety, and no u dont have to re pin a single thing if ur using the ecu that came with the engine and harness off the 3sge. if u need anything else let me know

Thank you! That's a major load off.

ETA - 4 WEEKS TOPS. I'm pumped.

... would be less time, but my buddy is going away on holidays for a couple weeks and my car/engine are at HIS shop...

[KAOS]

Any one here doing the 3SGE into a St204 use the S54 transmission from the 3SGE?

What pressure plate, flywheel, and friction disc did you use?

I used a 3SGTE flywheel and a clutch kit for a 3SGTE and I had no problems getting the splines lined up and the bell housing attached.

Did I do something wrong? I was recently told that I should have had to use a friction disc from a 5S as the splines weren't meant to match up... ???

[Smaay]

the E series trans and S series trans have different sized input shafts and spline counts.

[mi645]

kaos show us a picture of the transmission its most likely an e series if the 3sgte clutch kit fit.

[KAOS]

kaos show us a picture of the transmission its most likely an e series if the 3sgte clutch kit fit.

Check out my build thread, the last few posts have the pictures in them.

[KAOS]

Actually here:

[mi645]

thats an s54, how did u manage to put a 3sgte clutch on that? did u use a clutch alignment tool? when u bolted the pressure plate onto the clutch/flywheel, and u put the trans in gear when ur installing it to insure te shaft goes on correctly?

[KAOS]

thats an s54, how did u manage to put a 3sgte clutch on that? did u use a clutch alignment tool? when u bolted the pressure plate onto the clutch/flywheel, and u put the trans in gear when ur installing it to insure te shaft goes on correctly?

How can you tell for sure that's a S54?

Used the clutch alignment tool that came in the box. Centered no problem, didn't try to put it in gear though... could try that now that the shift cables, etc have been reconnected.




This post has been edited by KAOS: Jul 21, 2014 - 12:05 PM

[KAOS]

Have to drop the transmission out now and put in the 5S friction disc. :'(

[mi645]

its not so hard, im still curious how u managed to put a 3sgte clutch in there lol? if u have a spare 3sgte clutch maybe ill buy it to test if it works for the E56