1995 automatic tranny

Hey all,
I am new to this forum, and I have a question. My transmission up shifts fine for the first couple of gears, but as I get to the last gear (I think it is the last gear), my transmission takes a while to up-shift. I am at 3000 RPM before it up-shifts then goes down to 2000 RPM on the next gear. Is there any fix that will not require a new tranny? I can't replace it my self, and I don't have a lot of money to pay a mechanic.

Check the engine coolant temperature sensor.

where is that located?

top rear of engine block next to start injector time switch on driver's side of start injector time switch.

With connector removed, resistance between sensor contacts should be 2 - 3 kohms with the engine at room temperature, and between 0.3 - 0.4 kohms at operating temperature. In your case, the operating temperature reading is most relevant.

You can also check for transmission error codes similar to the way you check for CEL codes.
If you search you can find the exact procedure.