i swapped an automatic tranny for a manual tranny in my 03 wrx. the original tranny was an 03 automatic and was swapped for the 02 manual 5spd. my questions is are the read diffs of an 03 automatic the same as an 02 manual. im pretty sure thats gonna be a negative but i just want to make sure.

 

4EAT (your auto tranny) has a 4.44 final drive ratio, the manuals (pre-06) have a 3.9 ratio, so you'll need to swap the diffs.

I had my auto converted to a manual too

 

ok...thats not koo cuz my mechanic dint change those out and i drove it home and when im downshifting it vibrates so im guessing the rear diff is why its acting stupid...good thing i dint beat on it to much