wrx gearbox

[01726elvie]

hey ppl
can any one tell me if the gearbox numbers have to be the same when changing the gear box,my gearbox has gone on my93 wrx and i am looking into getting another and i need to know if i need the exact gearbox number as my own ,and also y is this if so as i dont have a clue thanks people:

[The Pilot]

gearbox number will be on chassis plate in engine bay and also on the top of the box near the starter motor ...

[01726elvie]

thanks for the reply mate,i have found the number but i need to know weather when i put a new gearbox in does it have to be the same number?

[The Pilot]

yup,or as close to,reason being,the wrong box will wind up the dif and blow it apart

[rikimaru]

You don't need the exact same box, but it must have the same final drive for the reasons above; will knacker your diff. If you get a box with a different final drive you'll need the diff as well.

[01726elvie]

so as long as the final drive is the same the gearbox will be ok?
or does the 1st,2nd,3rd,4th and 5th gear ratio need to be the same?

[shambles]

That's right final drive is the important bit. You could get another box and get the matching diff with it if you're having trouble finding one