This forum has been very helpful so far with my 03 AWD Vibe. However, I am perplexed as to what the second drain plug is for. It is behind the trans pan drain plug and inboard, close to the center and facing the passenger side.
I cannot find a fill plug for this supposed portion of the trans. I thought I found a fill plug for it behind the engine but it was for gear oil (a second transfer case fill?)
I've had this car for a long time & never noticed it, or if I did I tried to look up what it was for with no success and forgot about it. When I had an old Camry, it had separate transmission and diff fluids, but I had read they are now combined, so I disregarded it until today.
I just changed the trans fluid and decided to just crack it open, curious that they were both the same. I blotted fluid from the dipstick and the mystery plug onto some card stock, and they look similar but not quite and don't smell the same. The car has been driven, so any mixing between the two should have been complete.
Photo will follow shortly (attachment size is preventing me) but help in easing my mind would be appreciated. Is it just a second drain plug for the transaxle?