I changed the fluid in my 2000 v6 mustang
and a couple of days later I had a leak that I couldn't track down, it seemed to be leaking from the rear seal but I couldn't be sure. It only leaked about a half pint over 40 miles. I topped off the fluid and drove it to Aamco. They told me it needed a rear seal and a boot on the top of the transmission. Later they called saying it didn't need the boot but it needed a new gear shift selector (the part the stick attaches to) and the part was $200. They showed me the part and it did have fresh oil on the top of it. I called the dealer and they told me there's no seal in the unit because oil shouldn't get that high in the transmission.
Now I'm not sure what's right. Is it possible that it needed both and I was leaking from two new spots that started on the same day--sounds very unlikely, seals usually only blow in one spot on a unit even if there's a problem, right?
Is it possible I overfilled it and the only problem was the fluid leaking out of the top of the gear selector and it would have been fine had I just let the excess get out? It took within a pint of what I expected, the directions just said fill until it comes out of the fill hole.
Also worth noting, the rear seal is a pretty big job on that car, I've got to drop the drive axle and exhaust. That's more than I can bite off with just ramps. The gear selector is an extremely easy job, it's 10 bolts and a little RTV. I could've done it in 20 minutes in my parking lot with the A/C running.
Thanks for your input.