The pressure reduction valve in the ZF5HP19, ZF5HP19FL and ZF5HP19FLA units is designed to limit solenoid feed oil pressure. Wear in the bore and on the valve spools can cause the feed oil pressure to be high or low depending on the severity and location of the wear. Wear at the balance end contributes to high pressure and harsh shifting, while wear around the regulating and limit spools will tend to cause clutch slippage and failure. Installation of the Sonnax oversized pressure reduction valve kit 85755-09K will restore OE pressure control and limits to the solenoid feed circuits.

Hardcoat anodized aluminum valve combats premature wear
Spring is recalibrated to match OE spring calibration

More From This Category

Sonnax Clutch A Control Boost Valve Kit, Ford, ZF6Hp19/26/32, 6R60/75/80/100, Each

Sonnax Clutch A Control Boost Valve Kit, Ford, ZF6Hp19/26/32, 6R60/75/80/100, Each

$118.83

Sonnax Secondary Pulley Front Bearing, JF015E (Re0F11A), Each

Sonnax Secondary Pulley Front Bearing, JF015E (Re0F11A), Each

$100.06

Sonnax Boost Valve Kit, GM, 4L30E, Ar25, Ar35, Oe Code 264, Each

Sonnax Boost Valve Kit, GM, 4L30E, Ar25, Ar35, Oe Code 264, Each

$75.20

Sonnax Replacement Seal Kit, Ford, AOD, Each

Sonnax Replacement Seal Kit, Ford, AOD, Each

$13.48

Sonnax Friction Ring, 9.880in. X 8.750in. X .045", Hte Material, Each

Sonnax Friction Ring, 9.880in. X 8.750in. X .045", Hte Material, Each

$34.25

Sonnax Heavy Duty Throttle Valve Kit, Chrysler, 42-46-47Rh/Re, 48RE, 727, 904, Each

Sonnax Heavy Duty Throttle Valve Kit, Chrysler, 42-46-47Rh/Re, 48RE, 727, 904, Each

$75.05