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your torque converter isn't locked up when the exhaust brake
is applied, you're only benefiting from a fraction of its retarding
power. The BD Auto/PressureLoc commands the torque converter
to lock up, and stay locked up, any time the exhaust brake is
applied in third and fourth gears.
only helps with engine braking, but because there's no clutch
slippage, transmission oil temperatures remain low. The lock-up
clutch and exhaust brake automatically disengage at low speeds
to prevent stalling and transmission/converter damage.
also increases the fluid pressures to help prevent slippage
and maintain positive clutch contact.
BD AutoLoc is a computer that commands the torque convertor
lock-up clutch to stay applied when an exhaust brake is engaged.
The AutoLoc ensures that 100% of the retarding force is being
transferred in 3rd and 4th gears, thus, transmission oil temperatures
remain low because convertor slippage no longer occurs in these
gears. The lock-up clutch and brake automatically disengage
at low speeds to prevent stalling and transmission and convertor
damage. The convertor lock up clutch applies with accelerator
pedal pressure, and the AutoLoc captures this signal. After
shifting out or into overdrive in Dodge trucks, apply heavy
accelerator pedal pressure or quickly release the pedal and
the lock up clutch will engage. Exhaust brakes cause high automatic
fluid temperatures due to the torque converter slippage and
without a AutoLoc only 10-80% of the retarding force is transferred
through the (unlocked) fluid coupling of a torque convertor.
You can drive the truck with the AutoLoc engaged all the time.
If you experience a shutter when you slow down in over drive
with the AutoLoc engaged, you need to have the AutoLoc reset
to disengage at a higher vehicle speed. However, variances occur
due to rear ratios and tire sizes.
This product CAN NOT ship to California due to CARB regulations.