Some basic torque converter questions-

I understand basically what a torque converter does …. But what I do not understand is:

-Why do they wear out? Why?

-When they are repaired, what is replaced or rebuilt?

-How long does one last?

-How do you know you have a bad torque converter?

Thanks in advance for your answers.

I have been explaining basic principles of cars to the kids and I realized I didn't have adequate answers to the above.

Haasman

__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)