I have a 01 Ford Taurus SES. How long will it take a shop to change torque seal? on 2001 Ford Taurus

Has a trans leak and only leaks when hot. Local trans shop says i need a new torque converter seal and qouted me $500 to repair. Wanna know how long it will take?

All day.A ton of work to access it.I'm surprised that it's not more.
Old transmissions cn be a can of worms.Once they get it apart,don't be surprised if you need to spend more.