I have my transmission out of my 77 MGB. I purchased the car for the purposes of restoration but have never driven it. I am wondering if I have an o.d. transmission or a standard one. I have reviewed the archives of this site but find no information as to how to visually identify an od transmission. Can anyone provide a description as to what one might look like? The transmission I have has two electrical plugs on the top. I believe one is for the back up light sensor. I am unsure as to what the purpose of the other.