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R33 Rb25Det And Manual Box Into R34 Gt Auto!

daineisdabomb

By daineisdabomb,
in Engines & Forced Induction

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daineisdabomb

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ive just picked up a S2 r33 gts-t wreck for a good price. i want to pull out the rb25de neo engine and auto box and replace it with all the stuff from the 33 (engine, box, driveshaft, diff, beaks etc) all the mechanic should be straight forward but will the r33 rb25det wiring harness plug into the r34 rb25de ex auto harness or will it need some modding? has anyone done it n can u give me any tips? only post if uve done it or helped someone do it thanks. i want everything to work as it should, speedo, tacho aircon etc.

xntrq Veteran

xntrq

Posted
Posted

I haven't done it before but I've wrecked them, both 33 and 34 turbo. 33 turbo brakes are different to my knowledge to the 34, some bolt holes need to be modified I believe, though it is doable.

You'll need a RB25DET non-neo engine loom as it has been said it is different.

Personally if I were to do it, I'd take a 34 GTT and put it in a NA 34 or using 34 bits for 33 upgrade. I wouldn't go putting 33 parts into a 34. Just a personal thing though.

  • 2 weeks later...
daineisdabomb Collaborator

daineisdabomb

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The brakes and suspension from the 33 went straight on no problem. I know the gearbox will go straight on, only thing im not sure about is the wiring harness, particularly where it goes into the car through the firewall. Im not sure if it will plug straight up to the dash. I may put a neo engine in if the wiring isnt plug and play

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