Nissan Maxima

I have a 1994 Nissan Maxima GXE with 158,000 miles on it. I have a new timing belt, oil change and new radiator put in, in the past 3 months. The other day while I was driving the car feels like when you get up to 55 miles per hour it doesn't want to go it drags is the best way to describe it. When I am driving at 55 mph the RMPs are at 2000 is that correct? Please tell me if I can answer any other questions to help you to figure this out for me. Any help : cry: would be nice. Thank so much!
December 28, 2006.

Have you taken it to Auto Zone and got a diagnostic run on it (should be cheap. Mebbe free.)

But that is weird. Does it hum or anything or does it just drag?

Jan 30, 2007.