08Fusion101

I have a 2008 Ford Fusion SE 4 cyl. Upon acceleration from approx 5 to 20 mph driving in traffic my car will make a loud jerk or slam sounds like the car doesn't know which gear to go in . It accelerates fine it slows down fine, But when it shifts it shifts hard like a clunk type. Car has 70k on it and has been doing it since about 20k. Ive taken back to the dealer 4 or 5 times with the usual answer. CDS---- Cant do Sh--t. So any help ? Trans doesn't slip, doesn't lunge, it just shifts VERY hard or feels like a hard very hard jerk when shifting up to 2nd gear from a speed under approx 20 mph. Services done: Fuel injection service done twice. Transmission serviced. Transmission flushed. Hasn't EVER showed any codes, the service light has never come on. Thanks for ANY help..

I have a 2008 Ford Fusion SE 4 cyl. Upon acceleration from approx 5 to 20 mph driving in traffic my car will make a loud jerk or slam sounds like the car doesn't know which gear to go in . It accelerates fine it slows down fine, But when it shifts it shifts hard like a clunk type. Car has 70k on it and has been doing it since about 20k. Ive taken back to the dealer 4 or 5 times with the usual answer. CDS---- Cant do Sh--t. So any help ? Trans doesn't slip, doesn't lunge, it just shifts VERY hard or feels like a hard very hard jerk when shifting up to 2nd gear from a speed under approx 20 mph. Services done: Fuel injection service done twice. Transmission serviced. Transmission flushed. Hasn't EVER showed any codes, the service light has never come on. Thanks for ANY help..