Attention: TDR Forum Junkies Many questions are being asked about what the BD PressureLoc is doing to the transmission and if it is good or bad for the TCC, here is the basic operating theory for you to decide...
A BD PressureLoc increases convertor lock-up clutch applied pressure on 1994 to 2001 Dodge trucks by 30% at light throttle pressure. The kit can easily be installed on the stock transmission and assists in preventing convertor shuddering and transmission slippage.
Torque convertor clutch slippage results in high heat and eventual transmission failure! The higher the HP, the lower the transmission line pressure is, because line pressure is controlled by the position of the throttle pedal. The diesel has so much torque at light throttle pedal movement and thus low clutch apply pressure when the engine is at its peak torque!
You can notice a shuddering torque convertor under throttle at low speeds, and ALSO under heavy throttle with high power engines.
The kit's function is to increase the transmission line pressure ONLY when the lock-up clutch is engaged. The PressureLoc cylinder rotates the transmission’s throttle valve shaft to simulate 3/4-throttle travel to increase the line pressure to 90% of what the valve body design can attain at wide open throttle. (NOTE: The resulting pressure must be measured and set when the kits are installed. )
The PressureLoc is primarily designed for stock or mildly enhanced engine applications and owners who have installed an exhaust brake and want some extra protection. It is NOT a replacement for a modified valve body!
High horsepower and heavy-loaded applications should also be equipped with a BD Valve Body with larger porting for pressures up to 180 psi.
The PressureLoc increases the clutch applied pressure to 90% of what the valve body is capable of achieving at full throttle when you are only at ¼ to ¾ throttle travel. This kit addresses the need for more clutch holding pressure.
This pressure increase remains within the valve body design. The stock valve body has 4. 0 GPM flow when the torque convertor is locked up with the PressureLoc engaged. Without the PressureLoc engaged, this pressure will be 4. 0 GPM or less, depending on throttle pressure.
Our testing has shown that a stock transmission front drive clutch will slip at 280 lbs of torque with the accelerator pedal at ½ throttle position, which is in the range of 75 psi of pressure, and at 410 ft lbs when the pressure is 100 psi. The torque convertor clutch will slip at 565 ft lbs with 75 psi. With a PressureLoc engaged the pressure is increased to around the 100-psi mark.
What did we learn! Increasing the amount of pressure will assist in reducing the tendency for the clutches to slip.
Are you experiencing clutch slippage? If so you are applying more torque than the clutches are designed to handle.
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Real BOMBers never get speeding tickets. . just a lot of warnings!
A BD PressureLoc increases convertor lock-up clutch applied pressure on 1994 to 2001 Dodge trucks by 30% at light throttle pressure. The kit can easily be installed on the stock transmission and assists in preventing convertor shuddering and transmission slippage.
Torque convertor clutch slippage results in high heat and eventual transmission failure! The higher the HP, the lower the transmission line pressure is, because line pressure is controlled by the position of the throttle pedal. The diesel has so much torque at light throttle pedal movement and thus low clutch apply pressure when the engine is at its peak torque!
You can notice a shuddering torque convertor under throttle at low speeds, and ALSO under heavy throttle with high power engines.
The kit's function is to increase the transmission line pressure ONLY when the lock-up clutch is engaged. The PressureLoc cylinder rotates the transmission’s throttle valve shaft to simulate 3/4-throttle travel to increase the line pressure to 90% of what the valve body design can attain at wide open throttle. (NOTE: The resulting pressure must be measured and set when the kits are installed. )
The PressureLoc is primarily designed for stock or mildly enhanced engine applications and owners who have installed an exhaust brake and want some extra protection. It is NOT a replacement for a modified valve body!
High horsepower and heavy-loaded applications should also be equipped with a BD Valve Body with larger porting for pressures up to 180 psi.
The PressureLoc increases the clutch applied pressure to 90% of what the valve body is capable of achieving at full throttle when you are only at ¼ to ¾ throttle travel. This kit addresses the need for more clutch holding pressure.
This pressure increase remains within the valve body design. The stock valve body has 4. 0 GPM flow when the torque convertor is locked up with the PressureLoc engaged. Without the PressureLoc engaged, this pressure will be 4. 0 GPM or less, depending on throttle pressure.
Our testing has shown that a stock transmission front drive clutch will slip at 280 lbs of torque with the accelerator pedal at ½ throttle position, which is in the range of 75 psi of pressure, and at 410 ft lbs when the pressure is 100 psi. The torque convertor clutch will slip at 565 ft lbs with 75 psi. With a PressureLoc engaged the pressure is increased to around the 100-psi mark.
What did we learn! Increasing the amount of pressure will assist in reducing the tendency for the clutches to slip.
Are you experiencing clutch slippage? If so you are applying more torque than the clutches are designed to handle.
------------------
Real BOMBers never get speeding tickets. . just a lot of warnings!
