Abstract: There is provided a fluid rerouting system for valve bodies that use hydraulic pressure, via a balance pressure line, to move spools. In an exemplary embodiment, the system comprises a valve sleeve having a plurality of ports that are substantially aligned with a plurality of fluid connections in the mating bore, except that no valve sleeve port aligns with the balance pressure line. The system also includes a spool having a plurality of lands that are sized and configured to fit slidably in said valve sleeve. The combination of the valve sleeve and at least one of the lands form a chamber, fluid access to which is via an aperture traversing the land. Means for blocking the access of said balance pressure line to said valve sleeve are also included.

Abstract: A line-to-lube pressure regulator valve assembly for an automatic transmission including an internal check valve that opens in the Park gear range and at low engine speeds to feed line pressure to the torque converter in response to a substantially lower hydraulic fluid pressure than is required to open the pressure regulator valve in its factory specified operating range. As engine speed increases and sufficient hydraulic fluid pressure is built up within the torque converter charge circuit, the present internal check valve is again closed and the pressure regulator valve assembly opens as it would normally to feed line pressure to the torque converter directly. When the engine is shut off, the present internal check valve is biased to a closed position preventing transmission fluid from draining back through the valve to the transmission sump thereby eliminating the converter drain back problem.

Abstract: A replacement torque converter clutch regulator valve assembly for use within an automatic transmission including two cooperating valves, namely a regulator apply valve and an isolator valve, disposed in fluid communication with a line pressure circuit and a torque converter clutch apply circuit is disclosed. In one embodiment the regulator apply valve employs a regulator apply valve sleeve, which provides support to the regulator apply valve to prevent side loading. Modified control lands on the regulator apply valve have a reduced cross-sectional area calculated to increase the influence of the pulse width modulated solenoid, which provides an output pressure in response to the duty cycle imposed on the solenoid coil in pulse width modulated converter systems. In an alternative embodiment an isolator valve sleeve is utilized for instances wherein the isolator valve bore has extreme wear that cannot be corrected solely by the installation of the replacement isolator valve.

Abstract: A replacement torque converter clutch (TCC) apply valve for regulating the application of the torque converter clutch within an automatic transmission. The present TCC apply valve includes a valve piston having an expandable seal located at the primary wear location within the valve body to reduce hydraulic leakage. The valve piston also includes an internal fluid gallery formed therein in fluid communication with an annular groove wherein the expandable seal resides. Whenever the present TCC apply valve is actuated, TCC signal pressure enters the fluid gallery in the valve piston under pressure and urges the expandable seal in a radially outward direction into contact with the mating bore to minimize hydraulic fluid leakage during the apply cycle of the torque converter clutch. The valve piston also includes a control land having a substantially increased axial length with annular lubrication grooves, which improves stability and accuracy in operation.

Abstract: A replacement solenoid switch valve assembly for an automatic transmission system is disclosed. The switch valve assembly includes a switch valve member, which acts in conjunction with an interlocking valve disc set. The disc set is configured for reciprocating movement in tandem and also enables axial shifting movement of the discs relative to one another to support the functions of the solenoid switch valve assembly. This is accomplished by providing an axial stem which projects in perpendicular relation from a first disc. A mating hole in the second disc is radially disposed on the stem in sliding engagement thereon effectively interlocking the discs in alignment. In an installation method of the present invention, the tandem disc set is provided in standard size as a drop-in replacement for valve bodies that do not exhibit excessive bore wear and also in an oversize embodiment for valve bodies showing excessive wear.

Abstract: A replacement torque converter clutch regulator valve assembly for use within an automatic transmission including two cooperating valves, namely a regulator apply valve and an isolator valve, disposed in fluid communication with a line pressure circuit and a torque converter clutch apply circuit is disclosed. In one embodiment the regulator apply valve employs a regulator apply valve sleeve, which provides support to the regulator apply valve to prevent side loading. Modified control lands on the regulator apply valve have a reduced cross-sectional area calculated to increase the influence of the pulse width modulated solenoid, which provides an output pressure in response to the duty cycle imposed on the solenoid coil in pulse width modulated converter systems. In an alternative embodiment an isolator valve sleeve is utilized for instances wherein the isolator valve bore has extreme wear that cannot be corrected solely by the installation of the replacement isolator valve.

Abstract: A replacement torque converter clutch (TCC) apply valve for regulating the application of the torque converter clutch within an automatic transmission is disclosed. The TCC apply valve includes a valve piston having an expandable seal installed thereon at the primary wear location within a mating bore in the valve body to reduce hydraulic leakage. The valve piston also includes an internal fluid gallery formed therein in fluid communication with an annular groove wherein the expandable seal resides. Whenever the present TCC apply valve is actuated, TCC signal pressure enters the fluid gallery in the valve piston under pressure and simultaneously urges the expandable seal in a radially outward direction into contact with the mating bore to minimize hydraulic fluid leakage during the apply cycle of the torque converter clutch.

Abstract: A pressure regulator valve assembly for an automatic transmission that provides continuous hydraulic fluid flow into the torque converter charge circuit in all operating modes to prevent torque converter overheating is disclosed. The present pressure regulator valve assembly includes a valve piston subassembly having an encapsulated internal check valve in fluid communication with the line pressure circuit, which diverts hydraulic fluid to the torque converter charge circuit responsive to a lower fluid pressure (i.e. 2-5 psi range) than is normally required to fill the torque converter. When the vehicle engine is shut off, the internal check valve also prevents hydraulic fluid from draining back through the pressure regulator valve to maintain an adequate fluid level in the torque converter. In addition, an internal balance boost circuit has been added to the valve piston subassembly to assist the balance circuit in counteracting electronic pressure control (EPC) solenoid pressure.

Abstract: A self-regulating reverse boost valve assembly for installation within the hydraulic pump of an automatic transmission is disclosed. The present reverse boost valve assembly operates in conjunction with the pressure regulator valve to control line pressure generated by the hydraulic pump boosting line pressure in relation to engine torque. The present reverse boost valve assembly includes an internal check valve mechanism that is actuated whenever torque signal fluid pressure (proportional to engine torque) exceeds a predetermined level. When the internal check valve mechanism is actuated, the excess torque signal fluid pressure is diverted via an internal exhaust channel to the transmission sump. Thus, any drastic rise in main line hydraulic pressure or high line pressure in reverse gear, which can result in broken direct clutch drums and/or broken transmission cases, is prevented.

Abstract: A replacement forward clutch control valve assembly including a primary control land, which is designed to properly align the valve piston within its mating bore in the valve body of an automatic translate is disclosed. The primary control land has a substantially increased axial length in comparison to the original equipment manufacture valve piston without exceeding the overall length of the original valve piston. The present forward clutch control valve assembly provides a substantially improved control land-to-bore surface contact ratio and also provides a more durable end surface area for contact with the retaining clip during operation. As a result the present forward clutch control valve assembly is substantially less prone to bending and/or seizure within its mating bore during operation.

Abstract: A replacement actuator feed limit valve assembly, which regulates the flow and pressure of automatic transmission fluid within the actuator feed limit hydraulic circuit in an automotive transmission valve body is disclosed. The present actuator feed limit valve assembly comprises a hard anodized valve piston disposed within a mating, full contact valve sleeve having inlet and exhaust ports disposed about its circumference which increases actuator feed limit circuit control, reduces oscillation, and eliminates side loading and bore wear thereby correcting improper gear starts, soft/delayed shifting and clutch/band failure. The present valve assembly also includes fluid directing structures, which reduce the turbulence of hydraulic fluid passing through the valve. By substitution of alternative compression springs provided in an aftermarket kit format, the present replacement actuator feed limit valve assembly will function in either General Motors 4L60E or 4L80E early and late design transmission valve bodies.

Abstract: A reverse boost valve assembly for installation within the hydraulic pump of an automatic transmission is disclosed. The present invention includes valve pistons that oscillate within close-tolerance mating valve sleeves to minimize hydraulic leakage. The present valve pistons are manufactured from aluminum material and are provided with a hard anodize coating, which produces a low coefficient of friction between the mating surfaces. The valve sleeves are provided with a compatible anodize coating or, in the alternative, are fabricated from highly wear-resistant aluminum material. The reverse boost valve assembly is provided in both standard volume and oversize embodiments, which are interchangeable to permit a predetermined rate of line pressure rise to be selected for a given transmission. The reverse boost valve assembly is also supplied with or without external O-ring seals, which function to prevent line pressure leakage at the interface of the valve sleeve and the hydraulic pump body.

Abstract: The present invention relates to automatic transmissions of land motor vehicles. Specifically, the present invention relates to pressure regulation in the system of automatic transmissions of land motor vehicles. The present invention is a pressure regulator valve that limits TV pressure. This valve is meant to replace the original equipment valve in the same casing the said original valve sat. The pressure regulator valve is slightly oversized and the kit has an o-ring equipped end plug to more positively seal the valve bore and prevent pressure loss, known in the industry as EPC/TV pressure. Furthermore, the valve has annular grooves added to prevent side loading by properly centering the valve in a bore. The pressure regulator valve comprises a steel ball and a spring combination with a gel like substance being added to prevent high wear and tear of the entire valve.

Abstract: The present invention relates to automatic transmissions of land motor vehicles. Specifically, the present invention relates to pressure regulation in the system of automatic transmissions of land motor vehicles. The present invention is a pressure regulator valve that limits TV pressure. This valve is meant to replace the original equipment valve in the same casing the said original valve sat. The pressure regulator valve is slightly oversized and the kit has an o-ring equipped end plug to more positively seal the valve bore and prevent pressure loss, known in the industry as EPC/TV pressure. Furthermore, the valve has annular grooves added to prevent side loading by properly centering the valve in a bore. The pressure regulator valve comprises a steel ball and a spring combination with a gel like substance being added to prevent high wear and tear of the entire valve.

Abstract: The present invention relates to automatic transmissions of land motor vehicles. Specifically, the present invention relates to pressure regulation in the system of automatic transmissions of land motor vehicles. The present invention is a pressure regulator valve that limits TV pressure. This valve is meant to replace the original equipment valve in the same casing the said original valve sat. The pressure regulator valve is slightly oversized and the kit has an o-ring equipped end plug to more positively seal the valve bore and prevent pressure loss, known in the industry as EPC/TV pressure. Furthermore, the valve has annular grooves added to prevent side loading by properly centering the valve in a bore. The pressure regulator valve comprises a steel ball and a spring combination with a gel like substance being added to prevent high wear and tear of the entire valve.

Abstract: The present invention relates to automatic transmissions of land motor vehicles. Specifically, the present invention relates to pressure regulation in the system of automatic transmissions of land motor vehicles. The present invention is a pressure regulator valve that limits TV pressure. This valve is meant to replace the original equipment valve in the same casing the said original valve sat. The pressure regulator valve is slightly oversized and the kit has an o-ring equipped end plug to more positively seal the valve bore and prevent pressure loss, known in the industry as EPC/TV pressure. Furthermore, the valve has annular grooves added to prevent side loading by properly centering the valve in a bore. The pressure regulator valve comprises a steel ball and a spring combination with a gel like substance being added to prevent high wear and tear of the entire valve.