Tool Required VB-FIX Required
- Erratic TCC apply pressure
- Excess TCC slip
- Harsh TCC apply & release
- Low cooler & lube pressure
- TCC codes
Bore wear at the lubrication pressure regulator valve allows critical fluid to escape the circuit, resulting in erratic TCC/lube/cooler pressures.
Recover hydraulic control and revive TCC/lube/cooler pressures by reconditioning the bore and installing Sonnax oversized lubrication pressure regulator valve kit.
Oversized Lubrication Pressure Regulator Valve Kit
- Spring Red, Selective
- Spring Blue, Selective
Vehicles with Mercedes 722.9 transmissions commonly have TCC problems such as harsh apply and release or excess slip, often accompanied by TCC codes. These issues can be caused by bore wear at the lubrication pressure regulator valve, which allows vital fluid to escape the circuit. In addition, cooler and lube pressures can be negatively affected. Reconditioning the bore and installing Sonnax oversized lubrication pressure regulator valve kit 88740-09K restores critical clearances for renewed TCC, cooler and lube operation.
- Hardcoat anodized aluminum valve combats premature wear
- Springs calibrated and matched to valve to revive OE pressures