There are three reasons that I can think of:
1. The friction plate is worn out. or
2. it could be your axle bushings are gone and not letting the friction plates come together.
3. Your belt could be worn out.
I'd think not. But I could be wrong. ;)
It could maybe be the food that they don't like.
friction
your eating too much or not exercising enough
you could lose your entire balance in the account if it has reached the wrong hands
We could feel lone. For example: if you tell wrong thing to your best friend you could lose a friend. And you could feel sad every day if you or your friend look at you because you lose your trust.
mostly from age or over use.
There could be something wrong with it's diet.
you have to buy and install adjustable cam gears. but if you adjust it improperly you will lose power/gas mileage.
War is wrong for the people who lose their family.
Seeing a nutritionist could help you figure out the best diet and exercise plan for you. You may be eating the wrong foods or doing the wrong exercises. Going to a local gym and talking to a personal trainer could also help you lose belly fat.
Wear! As the working surfaces wear out, they don't mesh as well.