A PO740 led me to believe that there might be an internal leak and the filter was the only source that I could think of because I recently changed it. From a Chilton Diagnostic book, they list 4 possible causes for this particular vehicle:
Internal transmission component fault (Input or Reaction shaft)
Internal transmission leakage (valve body leaking or seal rings)
Converter clutch valve or clutch timing valve is sticking
TCC assembly has failed
Haynes refers to the part that the filter attaches to as the valve body so I was hoping for the second item listed above. But I think the symptoms have improved.
Today I disconnected the battery and reconnected it. I then checked to make sure the transmission fluid was at its proper level. I had to add about a half pint. Took it for a test drive. 2500 RPM at 60 MPH. The tachometer was steady. Before today, I could feel the transmission changing gears while I was going a steady speed. The tach reading was also changing.
Could my problem be fixed? Is 2500 rpm normal?
Tuesday, May 24th, 2011 AT 9:11 PM