Hi forum! Sorry to have my first post be a request for help, but I don't know much about Jeeps and you guys do. :) My Jeep has been having some tranny issues lately so I had Advance run a diagnostic check on the check engine light. It turned out that the output speed sensor is bad. They had some confusion picking the proper sensor since there's two of them on the tranny and I'm not sure they gave me the right one. I know this is very basic for some people but I've been looking for hours online and can't seem to come up with the answer. Is the output sensor the one closest to the back of the Jeep or closest to the engine? There are two and one requires a 1" socket... they gave me the one that does not. Thanks for any help you can give.

I've seen many cases of this and only one where it wasn't the speed sensor itself. The reason your speedometer reads fine is that the output speed sensor sends data to the transmission computer only.