GM 6L45, 6L50, 6L80 and 6L90 units may exhibit multiple line pressure and cooler/converter/lube flow problems due to excess wear in the pressure regulator bore. Deterioration at the balance spool end allows critical fluid loss, resulting in high line pressure, harsh shifts, and overheating due to reduced cooler/converter flow. Wear at the outboard spool robs converter feed pressure and lowers line pressure, resulting in soft shifts and burnt clutches. Wear at boost sleeve leads to loss of correct Reverse pressure.
Reconditioning the bore and installing Sonnax oversized pressure regulator and boost valve kit 104520-07K re-establishes the hydraulic integrity of these circuits for proper line pressure control in all ranges.

Oversized pressure regulator valve and matched spring restore OE function
Annular grooves help center valves in bore to reduce future side-load wear
Hardcoat anodized aluminum valves combat premature wear.

More From This Category

MANLEY Valve, Titanium, Intake, Bead Loc, 2.205 in. Head Dia, 0.3135 in. Stem Dia, 5.19 in. Length, For Chevrolet LS7, Set of 8

MANLEY Valve, Titanium, Intake, Bead Loc, 2.205 in. Head Dia, 0.3135 in. Stem Dia, 5.19 in. Length, For Chevrolet LS7, Set of 8

$3,037.65

Sonnax Oversized Pressure Regulator Valve Kit, A340, A340E, A340F, A340H, Each

Sonnax Oversized Pressure Regulator Valve Kit, A340, A340E, A340F, A340H, Each

$56.29

Sonnax 3-4 Accumulator Control Valve Kit, Ford 4R100, E4Od, Each

Sonnax 3-4 Accumulator Control Valve Kit, Ford 4R100, E4Od, Each

$19.94

Sonnax Oversized Solenoid Regulator Valve, Ford, E4Od/4R100 ('96 - Later), Each

Sonnax Oversized Solenoid Regulator Valve, Ford, E4Od/4R100 ('96 - Later), Each

$60.48

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.26 in. Height, Each

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.26 in. Height, Each

$307.70

MANLEY Valve, Race Flo, Intake, Bead Loc, 2.1 in. Head Dia, 0.3125 in. Stem Dia, 4.99 in. Length, For Chrysler HEMI, Set of 8

MANLEY Valve, Race Flo, Intake, Bead Loc, 2.1 in. Head Dia, 0.3125 in. Stem Dia, 4.99 in. Length, For Chrysler HEMI, Set of 8

$400.37