Ford 5R110W transmissions often suffer failure of the direct clutch assembly due to OE design shortcomings. Insufficient clutch capacity, poor heat dissipation plus flexing of the apply and backing plates especially when pressures are increased.
Sonnax high capacity direct clutch apply piston kit 36965-01K addresses these weak areas with an optimal balance of increased clutch capacity, improved thermal mass and stiffer apply and backing plates.
By adding one OE thickness friction plate, clutch holding capacity is increased by 25%. The one additional steel plate and thicker Sonnax apply and backing plates combine to significantly increase the amount of steel within the clutch pack for greater heat dissipation and greatly increased clutch engaging capacity that is ideally suited to improve direct clutch durability in hard-working 5R110W transmissions.