Oversize Low Pressure Control Valve Kit* Reamer Required
OVERSIZE LOW PRESSURE CONTROL VALVE KIT
Symptoms:
3-2-1 Bump
Harsh/No engine braking
Clutch failure
Cause:
Wear at the low pressure control valve allows 1-2-3 regulated braking fluid to exhaust.
Correction:
Install Sonnax oversized low pressure control valve kit into a refurbished bore to restore correct hydraulic clearances and prevent future wear.
In GM 5L40-E and 5L50-E units, the low pressure control valve applies in 1st, 2nd or 3rd Gear coast conditions, when engine braking is needed. Depending on the gear and solenoid states, 1-2-3 regulated fluid pressure is routed through this valve to provide engine braking through a controlled apply of the low/reverse clutch, 2nd coast clutch or OD clutch. If the bore has excessive wear, this regulated oil pressure is open to exhaust, resulting in 3-2-1 bumps on coast downshifts, no engine braking, and/or clutch failure.
Sonnax oversized low pressure control valve kit is easily installed into a refurbished bore and incorporates design upgrades to prevent future wear concerns.
Symptoms:
Cause:
Wear at the low pressure control valve allows 1-2-3 regulated braking fluid to exhaust.
Correction:
Install Sonnax oversized low pressure control valve kit into a refurbished bore to restore correct hydraulic clearances and prevent future wear.
In GM 5L40-E and 5L50-E units, the low pressure control valve applies in 1st, 2nd or 3rd Gear coast conditions, when engine braking is needed. Depending on the gear and solenoid states, 1-2-3 regulated fluid pressure is routed through this valve to provide engine braking through a controlled apply of the low/reverse clutch, 2nd coast clutch or OD clutch. If the bore has excessive wear, this regulated oil pressure is open to exhaust, resulting in 3-2-1 bumps on coast downshifts, no engine braking, and/or clutch failure.
Sonnax oversized low pressure control valve kit is easily installed into a refurbished bore and incorporates design upgrades to prevent future wear concerns.
Kit Contains:
SONNAX Installation Instructions