Topic: AT transmission problem

[excitebike]

Drive setting is malfunctioning. It acts like 2. Reverse is working, and 1-2, but 2-D doesn't shift anything; it does, however, allow the RPMS to drop when I let off the gas. Otherwise, the Drive setting works like 2. I just got the car with 160,000mi, and replaced the in-tank fuel pump, along with plugs, wires, o2 sensor, etc.

Could old ATF be the cause of this?