Do not use this medication if you are allergic to amoxicillin or to any other penicillin antibiotic, such as ampicillin (Principen, Unasyn), dicloxacillin (Dycill, Dynapen), oxacillin (Bactocill), or penicillin (Bicillin L-A, PC Pen VK, Pfizerpen), and others.
If you drive an average car, like a sedan, the average transmission fluid change cost will be around $60 to $100. Not too shabby. Normally shops are less expensive than dealerships (dealers are know to pad bills), but be wary of what kind of shop you bring it to.
Depending on your level of comfort working on cars, this is a relatively easy DIY job. You could change it yourself for under $40 in parts. Though Kent may be right. If you're not sure of what you're doing, it's best to have a shop do it for you. Your transmission should use Dexron III fluid, which is $2 qt.