for ex, whenever i go on a highway going 70 lets say i have to slow down i let off the gas fully then whenever i try and reengage with the gas my car starts to vibrate and feel like its rejecting to move the rpms but whenever i slam on the gas it goes smooth. and also when im going uphill the car starts to vibrate even more when i try and accelerate. this only happens when i accelerate at cruising speeds the car starts to shake and feels like its shudders.