R33 Rb20det Gearbox To Rb25det Gearbox

[Konan]

Hey guys first post here, recently the gearbox in my skyline started to whine and not sound extremely happy drained the oil and there were silver/gold flecks in the oil. Now this is where I'm having problems are N/A R33s equipped with a rb20det gearbox? I already have a parts list: 25det gearbox/front half of tailshaft/gearbox crossmember. Is there anything else I need to do? like the speedo sensor? Thanks for helping a newbie

[iruvyouskyrine]

R33 N/A has the same gearbox as RB20 DE or DET.

Will all bolt in the same, not sure about the neutral/reverse wiring though.

Everything else on your list is needed, seems you have done your homework

[Konan]

First major thing to break to since ownership and just trying to make it a little bit more bulletproof, the only thing bugging me doing this is the speedo sender part I would assume I don't need to change it since it should already electric correct?

[iruvyouskyrine]

That's correct. Just plug yours in and it should all work.

[DarkRyda]

RB20DET (NA R33) to RB25DET (Turbo R33) manual gearbox swap.

Required Parts:

- RB25DET Gearbox inc. crossmember, shifter

- RB25DET Tailshaft

- RB25DET Gearbox loom (for all the sensors) also known as an alternator loom.

- RB25DET Clutch slave

Your speedo will likely be off by almost half if you have a factory 4.36 LSD, some NA's had them some didn't. You'll need to swap over to a 4.11 LSD or install a speedometer calibrator.

[Ryno]

If your car is still NA you may be best to just put another RB20 box back in... They're around 20kg lighter, much cheaper and you usually don't have a problem with them until you are putting out over 250 rwkw.