The valve body is the "brain" of an automatic transmission. It uses hydraulic pressure to control the flow of transmission fluid, directing it to various parts of the gearbox to engage and disengage different gears. A faulty valve body can lead to common transmission problems like:
Shifting delays or hesitation: The car feels sluggish when accelerating.
Harsh or jerky shifts: You feel a noticeable jolt when the gears change.
Lack of power: The car struggles to move, even with the engine revving.
Error codes: The "check engine" or "transmission" light illuminates on the dashboard.