help swapping a 5 speed for an auto
 

i hav an 89 supra turbo. i'm looking to swap out the auto tranny for a 5 speed but i ran into a snag. i need a new wiring harness b/c mine is falling apart and so i want to just replace it so i don't have to worry about any wiring problems down the road. i will also re pulling the engine and rebuilding when doing the tranny swap. my question is: should i get a harness for an auto tranny or a 5 speed? the car also has ABS and i'm sure that makes a harness a little more tricky to find. a friend suggested a company called Painless Wiring. he said they have a lot of varities of harness. i haven't checked into it yet but if anyone also knows where a good place to get a harness would be that would be a great help. i'm looking for new or used, it just need to work. the question is for an auto or 5 speed though.

Depends what ecu you are using. I would suggest getting a 5 speed harness and ecu! I'm pretty sure all US supras have ABS. I have yet to see one that doesn't but I do not kno 100% on that. Also jdm r154 trannys do not have abs sensor so your gonna want to get a US one or spend 150 bucks on a sensor from driftmotion.

i had planned on using my 7mgte auto ecm. can i just trick the neutral safety switch or is there more i need to do? i have a 5 speed trans out of a 87 supra with a 7mge. will that one work or should i look for a different one?

You can trick it if you use another auto harness. But then you have more wiring then needs to be there with a 5 speed. The plug to jump is next to the starter! The w58 (NA trans) will work but you have to use a na clutch with turbo flywheel. Which you will be way over powering a stock na clutch so id recommend upgrading.. stay away from ebay clutchs.. The r154 (turbo) trans is alot more robust and reliable under higher HP. But it uses a pull style clutch not a push type like the w58.

so i should find a turbo 5 speed and find a 5 speed harness. i assume i will need to find a harness for a 5 speed that also has the turbo and abs connectors on it? or is the abs unit part of a different harness?

I would def. recommend an r154 but it is gonna cost you more money. But money well spent, cuz how good is a great engine without bein able to put it to the ground. The clutches for r154 last a lot better for higher HP.

If you use an automatic ecu. You HAVE to use an automatic harness that's the only way you can trick the ecu.



There is a few wires in the engine harness that are used for ABS. But like i said earlier your abs won't work on jdm trannys without buying the sensor.

well i think for the cost purpose at the moment i will probably use the n/a 5 speed since i already have it. so i won't need a sensor then? i also plan on getting a light weight flywheel and new clutch but i need to get a turbo flywheel and an n/a clutch correct?

Yea! You got it

Be easy on hard launches!

i won't be too hard on it until i build up the top end too :)

i have an 87 and an 86.5 both with out ABS