My 1999 Mazda protege is having problems. (automatic)?

first there's a problem changing fluid is just that changing not fixing the problem. the trans in your car is a 4F27E trans and does have several internal problems when it gets into the high mileage one being the shift solenoids going bad, also the band where the servo applies the band in the case wears also giving you a problem and the back end of the case breaks on the inside where it goes into the drum a trans shop can help out on which one is the problem don't bother with the change since the shop will do that along with fixing the problem