


I swapped my transmission since old one was bust i am not certain my rear differential and transmission drive ratios are matching.
So I recently swapped the broken transmission from my Subaru outback 2002 2.5L and I was reassured the rear differential matches with the new transmission since I am a bit skeptical as a whole I did a quick check on the transmission codes on their drive ratios also I tried to check the differential code for it to see what drive ratios it is but nothing on it I will attach pictures as well and here is the raw information
Factory transmission according to VIN number TZ1A4ZFCBA
The transmission that was replaced TZ1A4ZFABA-WJ
And the new transmission code TZ1A4ZFEAA-3M
The list I was referencing the numbers from lists the original transmission and the old transmission as a 4.444 but the new one as a 4.111 ratio
Now on paper that's a very big issue obviously but I've driven the car for about 400km since I got it I haven't noticed anything unusual a friend that is a mechanic suggested to me how to test it and it was to got to a empty parking lot and just rotated the steering wheel fully and with no gas to do a few circles in both directions that's where a mismatch will be the most apparent he mentioned symptoms like hopping skipping chirping jerking weird hum from the back of the car the car refusing to turn nothing like that the car didn't need any extra gas to keep turning no skidding of the tires no weird noises nothing like that so now I am really confused and I would love your opinions on the matter since I don't wanna say eh it's for fine and keep driving it until something serious happens and I also don't want to go and get my rear differential replaced if there is no need. Also while I was driving it on the road normally nothing weird would happen.