when I initally took car in they said it could be a sensor that needed replacing that sounded like maybe less than 100 to do or something else that may cost upto 350 to do.
They called a few minutes ago and said that they had to either remove or open my transmission to get to some kind of gear that makes my speedometer move. He said he would be calling me back in a little while to tell me what they need to do and the cost. Is this something that may cost more than 350 to do? If for example I am driving on the high-way at 80 miles per hour my speedometer will read and bounce back and fourth between 60-65 miles per hour the whole time I am on the highway. Sometimes it may creep up to about 70-75 and at soon as it reaches that will suddenly drop to about 60 again. It just started doing this about 3 weeks ago.

so it sounds like they have to either move or open transmission just to replace the speed sensor. Is this correct? It sounds like it is going to cost me.... to repalce speed sensor I just want to make sure that they are not scamming a woman who know a little bit about cars but not much....

ok........ I will hope for the best. And only replace speed sensor. But it sounds like that is not the case since they mentioned that they may have already touched the transmission.
-- Someone suggested that I should just buy a speedometer that i can just attach that may be less expensssive than the dealer messy with the transmission. I will wait for a call and go from there. Thank you for all the info that you have provided me. :)