So I purchased a parts car for the transmission, but after installing it into my car, I have realized the used trans. I purchased has one electrical plug that is different than my stock trans. Come to find out, they have different part #'s. I have a 2001 1.8T front wheel drive A4, the used trans. I purchased is from a 2000 1.8T front wheel drive A4, but the part #'s are different. Unfortunately I didnt realize this before I installed it in my car. The parts car trans. is an EFP, my stock trans. is an EZS. What is the difference? Please, somebody help me out.