Gearbox interchange

[Giaccovitch]

Gearbox interchange

Been offered a cheap price on an r33 rb25det gearbox and am wanting to put it into my r34 non turbo. Been trying to find info on the conversion but cannot come across anything. Is it a direct bolt on or will I need to change the tail shaft and/or other components? 

[V28VX37]

First result on google: https://www.sau.com.au/forums/topic/139916-diy-r34-manual-conversion-using-r33-parts/

[Giaccovitch]

it's a manual 34 already

[V28VX37]

55 minutes ago, Giaccovitch said:

it's a manual 34 already

Clutch is a different type so you'll need a 33 clutch, or swap over the bellhousing to retain your 34 clutch

What's wrong with your current gearbox, why go through the trouble?

[Giaccovitch]

Needs a rebuild, crunches 4 gears , I'm pretty sure the 33 box and the non turbo 34 box both use push type so clutch won't need to be changed. I've heard the tailshaft needs to be changed but I'm not 100% sure

[admS15]

Needs a rebuild, crunches 4 gears , I'm pretty sure the 33 box and the non turbo 34 box both use push type so clutch won't need to be changed. I've heard the tailshaft needs to be changed but I'm not 100% sure

Try putting some redline lightweight shockproof oil in it before replacing the whole gearbox. Could potentially save you lots of time and money.

[Giaccovitch]

25 minutes ago, admS15 said:

Try putting some redline lightweight shockproof oil in it before replacing the whole gearbox. Could potentially save you lots of time and money.

I've changed the fluid a few times, gets dirty real quick and there's always metal

[admS15]

I've changed the fluid a few times, gets dirty real quick and there's always metal

Fair enough. How much metal are we talking? A little on the magnetic sump plug or glitter show in the oil.