Car jurks when trying to shift in to over drive. on 2000 Ford Mustang

Has new tranny and rear axle instaled I belive its a sensor or something to do with the drivetrain.

Asked by for the 2000 Ford Mustang
Possible misfire as engine is under more load at that time.
V6 or V8 engine? Different ignition systems. (Dont think it is a 2000 Mustang with a 4 cyl.) Well i have never seen one anyway.