Paulo P

iTrader: (42)

My sister had a TY752vb4aa gearbox from a version 2 sti 555 fitted to her classic and I believe that the rear diff ratio was a 4.111 from the transmission chart but I need to know how to identify the rear diff that I have to know whether it's the correct ratio for this box?

Is it externally marked or do I need to open it and count the teeth or read the code stamped on the crown wheel?

Can anyone help me please?

Thanks

banny sti

iTrader: (68)

Pretty sure they are stamped from memory, if not count them as below

Ratios are :
9 - 40 = 4.444 [ 40 divided by 9 ] JDM STi
9 - 37 = 4.111 JDM WRX
10 - 39 = 3.900 JDM RA versions
11 - 39 = 3.545 Standard UK Now that is where the problem gets worse, as you
can see 3.9 and 3.545 use a 39 tooth crown wheel.

Paulo P

iTrader: (42)

I thought that they were stamped too because I remember stripping one before but I couldn't find anything using a search. That's very good information though and that will definitely help thanks