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R31 Series Iii Auto Into R31 Series I Vehicle?

maniax
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maniax Newbie

maniax

Posted
Posted

Hey all! Just fitted a motor and box from a series III r31 into my series I r31.

I have identified the wires from the selector switch with little problem, which is to say the car starts, the reverse lights work, and it knows when it's in neutral. However. . .

1.) The car has only 2nd and 3rd gears working, and I'm guessing some line pressure issues to soon fry or glaze my clutches?!

2.) The wires from 1st and 3rd have no home in the vehicle that I can find (the original gearbox had these wires too, but they have no mate at the plug end of things).

3.) I have little clue what the other wires from the box specifically are or what they do, or which ones are a necessity. I'm guessing there's a couple for kick back, probably three for a map sensor, a couple for the OD, and probably a couple more for the electronic torque converter lock up. The rest I would hazard a guess are for input to the gearbox's ecu (I hope not, and if so, I hope I can do without it).

I'm not concerned about the niceties of modulating line pressure too much, and am happy enough to run full pressure all the time. I can probably hook the converter lock up to the OD switch, etc.

If anyone could provide me with the information I need, like a wiring diagram/schematic for either or both series I and III, I would be very much appreciative. This information can also include; is the series III gearbox actually any stronger than the series I gearbox? ie, should I just put that back in?

Sincerely,

Maniax

ST1LO Enthusiast

ST1LO

Posted
Posted

i have a S3 that i blew the auto in and put a S1/2 auto trans in instead. imo the S3 box is shit.

in order to make that fit i had to run a S1/2 loom (basically the enitre loom except the engine loom) also the trans cooling lines are different and i had to put a tap in the manifold because the early auto is vaccume fed.

personally id just put another S1/2 auto in it.

hope this helps

  • 6 years later...

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