So I plan on pulling my motor this winter and I have a spare transmission that we bought a couple years ago. My current transmission grinds in 3rd and very little in 5th. We were told the spare that we bought was in good working order but is there any way I can test it without actually installing it in the car and driving it? I would hate to install it after my engine rebuild and have it be worse than my current tranny so that I have to drop the tranny again to swap it out.