Oversized Low Pressure Control Valve Kit

Oversized Low Pressure Control Valve Kit • Valve • Plug 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 O.D. 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. The Sonnax low pressure control valve kit 55211-17K easily can be installed into are furbished bore, and incorporates design upgrades to prevent future wear concerns. Symptoms: • 3-2-1 Bump • Clutch failure • Harsh engine breaking in 1st • Harsh engine breaking in 2nd • Harsh engine breaking in 3rd • No engine braking in 1st • No engine braking in 2nd • No engine braking in 3rd Cause: Wear at the low pressure control valve allows 1-2-3 regulated braking fluid to exhaust. Correction: Install the Sonnax oversized valve and end plug kit into a refurbished bore to restore correct hydraulic clearances and prevent future wear. Required tool: F-55211-TL17