pretty sure my rear diff is junk in my 03 wrx. but ive found plenty of junkyard replacements. my question is can i use a diff outta an auto wrx. theres one closer therefore cheaper for me to get but will all gear match up
wrx auto final drive ratio is 4.11 and manual is 3.90. Being that the auto trans has slightly different gearing since its a 4spd and the final drive ratios are different I would think theyd have the same differential ratios. Does that make sense?