Hello and welcome to justanswer.com,
you have a little reason to worry about the transmission. Your model has had issues in the past with the transmissions. I f the man who sold you the car kept up with his regular services and you are not experiencing any issues you are probably ok.
based on the mileage if you are near 105,000 miles then i would strongly suggest the timing belt, water pump, drive belts and spark plugs . Also a valve adjusted is recommended. Some valve noise is absolutely normal so if they are real loud then i would be concerned.
having the transmission fluid changed would be a good idea also as long as it was not replaced at 90.000 miles.
the speedometer sounds like there might be an issue, but usually this sort of issue is accompanied with a check engine light. you will need a competent technician to check into the issue further. could be either a mechanical or electrical issue in this instance.
Thank you very much this helps a lot. i dont have much info on the service history of the car. but I will look into the transmission matter. How much would the rest cost me to fix approx. how can I tell if the transmission fluid was changed? He did say there was a small computer problem, that could be the speedometer issue. Hope it could be fixed.
the timing belt, replacing the spark plugs and adjusting the valves should run you approximately $1200-1500.
if the trans fluid is red and not dark brown or smells, then chances are its been changed.
A small computer problem? Hopefully you can get more information about that situation