How To: ATX to MTX swap

[Atrosity]

Maybe the waybackmachine still has it on file from the time I built the stone henge LOL

Wow so you are THE Hans in the history books who built stone henge...fuck man, it all just adds up now.

[Assy]

how did you get the reverse light to work and the speedo?

[TUFFTR]

how did you get the reverse light to work and the speedo?

Personally with me, I made my loom a shambles when i did the conversion (also went SOHC to DOHC long story) anyway, reverse lights should still be a wire up the front in the loom SO IVE SEEN TOLD, i couldnt find this but found it running along the RHS drivers footwell. so i found the appropriate 15A power source from the fusebox to the reverse light switch, and from there i installed a wire (all factory looking no random shit everywhere) going to the drivers side footwell.

[TwIzTeD_3kGt]

how did you get the reverse light to work and the speedo?

The speedometer uses the same plug on both transmissions. For the reverse lights, IIRC, there's 2 wires in the harness that used to plug into the ATX that need to go to the reverse switch on the MTX. I believe I cut them out of the ATX plug and connected them to the plug on the MTX.

[n2nsanity]

or u could switch out the entire harness, right?
i'm going to be doing one soon. i grabbed every single part that i could possibly need, lol

[Assy]

do you recall what colors and where i dont know how to test to find it.... also what did you cut to make the car think its in park?

[DrGonzo]

If you are using the ATX harness you will need to bypass the ATX neutral safety switch. I don't know the pins off the top of my head but on the ATX harness in the engine that connected to the Trans you will have to jump two wires together.

[TwIzTeD_3kGt]

do you recall what colors and where i dont know how to test to find it.... also what did you cut to make the car think its in park?

What year are you working on?

[Assy]

its a 93 3000gt thanks

[TwIzTeD_3kGt]

Here's the wiring diagram for that circuit:



Note the connectors at the bottom of the first picture and their shapes/sizes. I'm not 100% sure which connector is the one that plugs into the trans, if you can tell me which one it is, I can tell you for sure. But I think it's (B-26), in which case you would need to connect wires 7 (yellow) and 8 (red) for the starter. It looks familiar but it's been a long time since I've dealt with this, so I don't want to send you on a wild goose chase.

Here's those circled so you can see what I'm talking about.