That is sure suspicious! He doesn't tell you until you want to fix. Looks like he wants to keep your vehical there and squeeze more money out of you. Typical mechanic: all they want is as much money as possible, even to the detriment of the client. Only once met a good mechanic, but only works on modern Volkswagens.

If I was in your shoes, I at least check with a highly recommended transmission shop here on the Peach. If don't want to do that, consider Tom's or other offers and replace the unit.

Hope this helps.

__________________
Current fleet:

1985 Mercedes-Benz 280TE - Waiting for heart surgery.

1985 Mercedes-Benz 300TDT - Rear ended 23 September 2016 and now looking for a new home.

1979 Mercedes-Benz 300TD - Parted out.

1964 Volkswgen Beetle - Vater's since September 1968 and undergoing a restoration.

1971 Volkswagen Sunroof Squareback with F.I. - in need of full restoration.

1971 Volkswagen Squareback automatic with F.I. - Vacationing with her caretaker until he is in better health.