1995 Olds Aurora; 98000 actual miles; transmission started not shifting into high gear; RPM's running around 3000; had fluid and filter changed; looks great inside pan; does something electronic need to be reset?.

Transmission not shifting into overdrive right.

Check fuel flow and pressure , if pressure is low check fuel pump. if flow is low replace fuel filter.

change the ******.. they are notorious far going out. mine has 86000 orginal miles on it and i just had to have mine rebuilt.

It winds up in 1st and then shifts right from 1st into 3rd. Then never shifts into 4th. Plus rev is gone. You broke the sun shell. The transmission will need to rebuilt or replaced.

About time to rebuild it.

Try changing the transmission fluid and transmission fluid filter. It is a fairly easy but kind of messy job. Just buy the new fluid and filter, Grab your metric socket set and go at it. NEVER WORK UNDERNEATH A HOT VEHICLE. You have to pull the transmission pan to do this job. When you break the gasket seal several quarts (liters) of transmission fluid will cascade down on you. Be ready for it. Don't forget that when it stops draining there is still a lot of fluid left in the pan. When you finish cleaning up the fluid clean the gunk out of the pan. Install the new filter and reinstall the pan with a new gasket. Do not over torque the pan or filter bolts. If you strip them out or break them off you will need professional help to repair it. Refill the transmission with fluid. It should take six or seven liters.

the tranny is slipping ,,in other words its starting to go.

Try changing the oil and filter. If that doesn't help, try the speed/shift sensor, or do that first, it's up to you.

Saturn says and I quote

there transmission fluid is not to be changed after the first change at 6000 miles.

Now I say it should be changed at every 30000 miles. If changing out the fluid doesn't work then you need to go to a transmission repair shop.