Hi all - I'm after some advice re: the Aussie 120Y. I'm removing a 5 speed from one on friday night and replacing it wth a standard 4 speed. I have a couple of questions - I don't have the car with me yet so just trying to do some research before then.
1. Is the 5 speed the same length as the 4 speed?
2. Will the 5 speed drive shaft fit the 4 speed box?
3. Anything else worth noting?

Cheers,
Ian.

yes,they're the same length,yes,the tailshaft will fit the output shaft,but you'll probably have to dig up a gearbox crossmember to suit the 120y,because the mounts on the box are in different places on the rear housing.good luck.which side of the tasman are you doing this,cause i took a sunny 4 speed out over the weekend,& you could have it's crossmember if needed.i'm in sydney.

Thanks Paul - I'm in Baulkham Hills. So the Sunny cross member will bolt up to the 120Y? How far away are you?

i'm in greystanes,& i can't guarantee the crossmember will be the same,because sunny's all seem to have the same width tunnel. I don't think 120y's do,BUT i think i have a 120y gearbox crossmember here in the shed,not the storage unit,where i'd never find it.does the 120y box have a crossmember?another thing that just occurred to me is the clutch forks are different,plus the throwout bearing housing could be longer.unless it's a a12 5 speed with a 1:1 5th.hopefully the 120y box will have all this attached,so it wont be a drama.i do have the stock clutch fork & throwout bearing housing still on this other 4 speed,but the box itself is pretty worn.there was more gearbox oil on the underside of the car than in the box.was a bit whiny.

The 5 speed in my 1000 is from a 120Y & it went straight in. I even used the 1000 gearbox crossmember. I don't remember which gearbox mount i used, but it's probably a 1000 unit too.

i had to get my tailshaft cut down when i put my 60a 5speed box in....it was a import box from NZ but, but yeah i had to cut my shaft down.


im a 1000

the sunny 4 spd crossmember has to have the bolt holes moved a little but it can be done with a file just get a big washer to stop any movement.