Amazingly, my Contour comes equipped with an 8 speed transmission during moderate or hard acceleration.

When accelerating the transmission shifts but it feels like the torque converter fails to lock. After a couple of hundred yards, the RPMs drop about 300 and the transmission is firmly in gear.

This only happens on medium to aggressive acceleration. Other times, the shifting is completely normal.

Any ideas?

The fluid has been changed twice with the recommended product. The fluid levels are good and constant and the fluid is not breaking down.

If I had 400+ horsepower I could claim I was overpowering the drive train...

Thanks,