In Chrysler 48RE transmissions, the cooler/converter charge circuit is not opened until the pressure regulator valve moves far enough to flow oil. The industry fix of drilling a small orifice between line pressure and cooler circuit ensures flow to the converter/lube circuit, but the hole also increases the converter drain back problem because ATF can drain when the engine is turned off.
Sonnax offers oversized lube regulated pressure regulator valve and line/TV pressure plug kit 22771A-16K that allows rebuilders to salvage worn valve bodies.

Oversized pressure regulator valve is designed with an internal check valve that allows oil to flow into the converter charge circuit as soon as the vehicle is started
Internal valve shuts down once line pressure reaches normal levels
With engine off, the internal check valve prevents fluid from draining out through the orifice, reducing converter drainback
Includes a matched oversized line/TV pressure plug and pressure regulator spring

More From This Category

MANLEY Valve, Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.465 in. Length, Each

MANLEY Valve, Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.465 in. Length, Each

$75.93

MANLEY Valve, Race Master, Intake, 2.02 in. Head Dia, 0.311 in. Stem Dia, 5.728 in. Length, For Dodge, Set of 10

MANLEY Valve, Race Master, Intake, 2.02 in. Head Dia, 0.311 in. Stem Dia, 5.728 in. Length, For Dodge, Set of 10

$500.47

MANLEY Valve, Severe Duty, Exhaust, 1.9 in. Head Dia, 0.311 in. Stem Dia, 5.522 in. Length, For Chevrolet BB, Each

MANLEY Valve, Severe Duty, Exhaust, 1.9 in. Head Dia, 0.311 in. Stem Dia, 5.522 in. Length, For Chevrolet BB, Each

$75.93

MANLEY Valve, Race Flo, Intake, 2.165 in. Head Dia, 0.3133 in. Stem Dia, 5.2 in. Length, For Chevrolet L92, Each

MANLEY Valve, Race Flo, Intake, 2.165 in. Head Dia, 0.3133 in. Stem Dia, 5.2 in. Length, For Chevrolet L92, Each

$51.07

MANLEY Valve, Titanium, Intake, Bead Loc, 2.08 in. Head Dia, 0.311 in. Stem Dia, 5.14 in. Height, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.08 in. Head Dia, 0.311 in. Stem Dia, 5.14 in. Height, Each

$320.57

MANLEY Valve, Extreme Duty, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, For Chevrolet BB, Each

MANLEY Valve, Extreme Duty, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, For Chevrolet BB, Each

$129.64