98 Eclipse Engine Question

Hey what's up!, I just had a question over a 98 Eclipse with a Chrysler Engine. Is it normal for the engine to tilt back and forth when ever I put the car on reverse and on drive. I thought it was the motor mounts, but they were new. so I took it to a Mitsubishi Dealer and the told me that the operation was normal since the car had a chrysler engine. But I just wanted to know if anyone had the same problem.  And does anyone know how to change the outer and inner Tie Rods? or does anyone have a good estimate of how much it would cost to get them replaced

thanks