Transmissions are probably the most abused part of a vehicle.
Something people just don't think about until it's to late.

Back in 1991 we bought a used Lincoln 1979. It ran with no problem for a couple of years and then began to just stop at street lights. Dead to the world. We had it towed 2-3 times to car shops, they started it up and no problem purred like a kitten.
My cousin that had owned same make of car came over when the car was dead in the drive way, took out a ball peen hammer and tapped on the Master Cylinder, Car came alive.
So we went down to auto shop for a new one, installed it and darn that did not work. So we went to another auto parts store and got another and Bingo, not one more problem for another 4 years.
I have no idea what a Tannie is, thought they were Gay men becoming woman.
Transmissions are odd, heading down the highway the clutch on the KIA went out. Lucky we had AAA, car towed to a KIA shop and we were driven home. What was wrong, seems a spring and pin had fallen out, cost to repair $10.00 labor $25.00.
To make things more confusing for us owners are some car makers change design mid year. A Citation I once bought second hand had a problem, forget the year, but when we went to get parts the Auto dealers told us our car by year had no such parts. We had to drag them out of the store, lift he hood to show them what we needed. Into the store and on the computer went the dealer to find that in fact my car had been built mid year.
Now as to my KIA, 2001, 50,000 miles on it as it is a summer car. The freeking doors in cold weather will not close until the car warms up for 30+minutes. I had a 64 Corvette stingray that was the same way, had to wrap the seat belt around the door handle to close the door