I was reading in the Owner's Manual and it stated that when the torque converter is "lock-up" you will feel like the gear is shifting. How harsh is the shift? I feel a little harsh shift sometime, not sure it could be the torque converter.

Also, as stated that the car would give about 20mpg/city...of course that is if the car is brand new. Mine has about 50k miles, and the mileage is pretty bad...it's less than 15mpg/city. Anything you can do to improve the mileage, clean the fuel injector or any other advices.

 

take a read of the thread list for your gen and do seafoam treatment- get new spark plugs- inflate the tires-
should get 19 city
27-29-31??? straight hiway

 

the torque convertoer you feel in D5 and you reach a little hill, it downshifts - sort of
gently

 

torque converter lockup is smooth. If your feeling any harshness its probably the trans changing gear