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The engine control module in the automatic transmission Supras and the Manual transmission Supras in the MKII (1982-1986) body style are interchangable year for year. You do NOT have to swap the wiring harnesses, contrary to what is posted below.

You WILL have to trick the car to make it start. This is because the automatic transmission ECM needs to see the vehicle is in park or neutral before it can be started. This is easily done by retaining the neutral safety switch from the automatic transmission and "clicking" it to the park or neutral setting permanently.

Parts wise, here is what you WILL need to complete an automatic to manual transmission swap for your car.

Front piece of driveshaft from manual supra (or entire driveshaft) - Cressida driveshafts are not the same length as MKII driveshafts and can not be substituted.W58 transmission w/ proper bellhousingW58 clutchW58 flywheel and boltsmanual transmission crossmemberclutch slave cylinder and soft lineclutch master cylinder and hard line that runs down body to bracketclutch pedal assemblybrake pedal assemblyManual shifterPilot bearing (buy a new one)

AnswerHi to let you know that I know what im talking about I auto cross a 86 supra and I work In a transmission shop you would need to take the computer and the whole wire harness from the computer to the motor from a 5speed supra the same year as your auto and use it to wire the motor with that set up because there are several relays and sensors on the auto that are control bye the PC that the manual dose not have and the autos PC controls those and if there not there to read your car would run like hell if not at all you probably already know about switching flex plate to fly wheel and all that good stuff
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โˆ™ 2011-09-13 00:29:24
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Q: How do you change the wiring for changing from a 1985 supra automatic to a 1983 supra 5 speed transmission?
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