a torque converter assembly comprises : a cover for driving engagement with a prime mover ; a piston plate including an annular surface for engaging a clutch ; and , a sealing plate comprising a substantially radial wall arranged between the cover and the piston plate and disposed radially inward of the annular surface , wherein : in a lockup mode for the torque converter , the sealing plate blocks fluid flow between the cover and the piston plate ; and , in a release mode for the torque converter , the sealing plate is deflectable to enable a fluid flow between the cover and the piston plate via a pathway between the cover and the sealing plate .