P0770 Toyota -Will this code (P0770)make the vehicle vibrate when at crusing speed(55mph)?

Question

Vibration feels like going over rumble strips. If accelerate or decelerate the vibration goes away. Transmission shifts normal.

Answer 1

yes its possible for this code P0770 to cause shacking or jerking of the car, 

The problem is related to the transmissions Solenoid valve SL, the valve body itself or the torque converter.

when was the last time the transmission fluid was replaced? it should be replaced every 30k miles

you can start by replacing it with OEM toyota fluid 

If there are metal pieces or metal flakes the chances of the fluid replacement helping become slim