Gas pedal and seat vibration between 40-45 mph
I have a 07 Camry XLE V6 (48600 miles). Recently replaces front two struts and shocks as they were leaking. Rear one were good. Also replaced tires with four new COOPER CS4 Touring tires. First time after mounting there was shake at speeds above 50mph (can be felt on passenger and driver seat, steering and gas pedal). Took it back to NTB for balancing and now can feel the gas pedal and seat vibrate at accelerating speed of 40-45mph only. Haven't had a chance to try at higher speeds yet, but once it holds steady at 50mph or decelerates the vibration does not exist. Not sure why this is happening after balancing twice. Since the gas pedal is vibrating i guess it should be something to do with the rear end of the car as the steering is not vibrating (very very faint or nothing). The gas pedal and seat vibration is not terrible but does not feel normal. Any advice would be greatly appreciated. Thanks in advance!!