Hi,

My gearbox is beginning to annoy me alot so i want to change it. I can get a revised gearbox but the lad doesnt has the rear diff with it. So i spend a few hours gathering information if i could use my existing diff yes or no.

Made a small xsl file



Now currently i am the one with the TY752VB4AA box (jdm sti V2 wagon)

do i need to change the diff or not if i want to go with the TY754VN1AB

regards, chris

 

It will be fine with the current diff.

 

Can somebody confirm this? some of my mates say it won't work out?

 

What are they saying wont work out?

 

Are you sure that TY754VN1AB has 4.111 rear diff?

I think it's 3.54

 

As far as I'm aware if its a VB then its a Jap gearbox with a 1:1 transfer box reduction ratio, a VN will be a UK/Euro gearbox with a 1.1:1 transfer box reduction ratio, so the rear diff will be different. This if mated to an incorrect gearbox will result in a gearbox failure.

I would try and get yours rebuilt, or get a matching diff and box.

 

TY 754 VN1AB ought to be a push type clutch operation and your STi 3 is pull type operation. That makes it a bit tricky to fit. PLUS the VBAAA is 4.444:1 ratio front and rear. Whereas the the VN1AB is 4.111 ratio front and rear.

There will be a better option, that one is not a great choice.

David APi

Talk to Eric Ybema at NMB in Nederlands. He used to be APi Nederlands and is good with Subaru over there. Contact him on 5055 30386 Groeningen or somewhere close by I forget exactly where. He'll be able to help you. tell him I sent you.