Like its predecessors
(47RH/47RE), the 48RE transmission’s low mainline pressure
at lighter throttle pedal position can cause shudder and slippage.
When coupled behind the Common Rail 5.9L Diesel engine with
its peak torque at mid-range RPM’s, this potential shudder
and slippage can be amplified.
When engaged with
the rotary switch mounted on the dash, the Pressure Controller
has three different levels that can be selected to increase
mainline pressure by mimicking higher throttle positions,
preventing mid-range convertor shutter and clutch/band slippage.
The BD Pressure
Controller is designed to almost eliminate all shuttle shifting
with light throttle and as an added feature, this unit slightly
holds or delays shifting to prevent lugging and improve transmission
function – reduces shift flare and gear hunting.
The BD Pressure
Controller ‘s pressure increase is at its greatest during
light throttle positions and ramps towards stock pressures
as the pedal gets closer to full throttle when the extra pressure
is no longer needed.
With performance
modules for the 5.9L Diesel engine, the increase in horsepower
tends to make the driver apply less throttle to obtain desired
vehicle speeds. In turn, the less APPS Accelerator Pedal Position
Sensor applied causes lower mainline transmission pressures
to be developed causing potential shudder and slippage. The
Pressure Controller compensates for lower APPS Accelerator
Pedal Position Sensor and brings the pressure up to a level
to protect the transmission and converter.
Compared to some
of the competition on the market, the BD 48RE Pressure Controller
has higher pressure, more elaborate control and easy factory
plug-in installation. Another reason to think BD when looking
for your Diesel transmission needs.
