Mercedes 722.9 transmissions often suffer shift abnormalities caused by excess wear in either or both of the supply pressure regulator valve bores. The supply pressure regulator controls the pressure supplied to solenoids, and functions similarly to solenoid pressure regulators found in Ford units. This wear allows fluid loss which prevents proper regulation of oil pressure supplied to control solenoids, resulting in harsh or soft shifts, solenoid codes, wrong gear starts, TCC apply issues, and clutch failure.
Reconditioning the bore(s) and installing Sonnax oversized supply pressure regulator valve 88740-02 restores hydraulic integrity to this circuit, restoring normal shift operation and feel in all ranges and the hardcoat anodized aluminum valve combats premature wear.

More From This Category

MANLEY Valve, Severe Duty, Intake, 2.325 in. Head Dia, 0.3415 in. Stem Dia, 6.59 in. Length, BBC, Set of 8

MANLEY Valve, Severe Duty, Intake, 2.325 in. Head Dia, 0.3415 in. Stem Dia, 6.59 in. Length, BBC, Set of 8

$628.35

MANLEY Valve, Street Flo, Exhaust, 1.55 in. Head Dia, 0.3415 in. Stem Dia, 5.08 in. Length, For Ford SB, Set of 8

MANLEY Valve, Street Flo, Exhaust, 1.55 in. Head Dia, 0.3415 in. Stem Dia, 5.08 in. Length, For Ford SB, Set of 8

$280.36

Sonnax Afl/Solenoid Pressure Regulator Valve Kit, Ford, 6F50/55, 6T70/75 Gen I, Each

Sonnax Afl/Solenoid Pressure Regulator Valve Kit, Ford, 6F50/55, 6T70/75 Gen I, Each

$121.22

MANLEY Valve, Severe Duty, Exhaust, 1.9 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.9 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, Set of 8

$607.34

MANLEY Valve, Custom, Titanium, .3415 in. Stem Dia, Each

MANLEY Valve, Custom, Titanium, .3415 in. Stem Dia, Each

$326.62

MANLEY Valve, Race Flo, Intake, 35.5 mm Head Dia, 5.5 mm Stem Dia, 109.22 mm Length, For Honda, Set of 8

MANLEY Valve, Race Flo, Intake, 35.5 mm Head Dia, 5.5 mm Stem Dia, 109.22 mm Length, For Honda, Set of 8

$399.33