are separating the 47/48RE electronic automatic transmission
from yesterday’s 47RH hydro-mechanical automatic transmission
with some never before seen abilities. We have, with speed
and simplicity for tuning, what may have seemed like a complex
impossible task in the past.
can use these inputs as well as torque converter speed, engine
speed, wheel speeds, traction control parameters, electronic
throttle position, fluid temperature, engine temperature,
brake pedal actuation, forward and lateral acceleration as
well as several other parameters. The TCU can also utilize
manual shifting operation and provide altered transmission
behavior for special conditions (road race, drag race, dyno,
snow, towing, etc.). but the only thing required to make your
transmission is a TPS signal, power and ground.
comes with a preprogrammed tune from Sun Coast, but you should
connect to the TCU, download the program and save it to your
hard drive to fall back on. If you do not have a serial port
on your computer (some laptops do not) you may purchase a
USB to serial port adapter and install the correct drivers
before trying to communicate with the TCU.
compatibility and reliability, please purchase our USB to
serial adapter which we have tested.
was designed with the rigors of the automotive environment
in mind. The TCU is designed for a high temperature, caustic
and humid environment. Though the TCU can easily live in such
an environment, an installation location inside the vehicle
is preferable. Please keep the TCU away from extreme heat
sources, ignition wires or any obvious water sources.
have chosen a location for your TCU, you may begin routing
the wiring harness. Be careful to avoid moving parts and hot
parts when routing the harness. Route the harness to your
sensor locations and wire them as planned. Route the connectors
and wires down towards the transmission. Watch for possible
fitments issues or places where the harness can rub or be
damaged over time.
and wire necessary sensors
will need to find the wire locations for the sensors you wish
to use. Every application requires a vehicle speed signal
and should be installed with a load input. Typically this
load input is a throttle position sensor (TPS). Vehicle speed
can be measured at a driven wheel, a differential speed sensor
or an output speed sensor on the transmission itself. RPM
can be acquired from a cam or crank sensor or tachometer wire.
If you wish to use manifold absolute pressure (MAP) for load
(boosted applications) or additional sensors, find them now.
to the wiring diagrams for your vehicle to determine the signal
wires on each sensor. Please look at the wiring diagram on
pg 62 & 63 in the manual to see what wires on the TCU
are appropriate for your vehicle. If a custom harness is available
for your transmission, use the wiring diagram for the custom
method you use to tap into these sensors will depend on your
experience and preference in connectors. For a permanent installation,
please remember that no wire should be exposed to the elements.
If possible, splice into your existing harness or wire in
your own Y-harness. Always remember to use heat shrink, preferably
the sealing or glue type of heat shrink, on any exposed wire
joints or unsealed connections.
Wire power and ground connections
simple this is an important step. Wire switched power to the
TCU. On most applications, the power source should be protected
with a 10 amp fuse. Wire a ground connection to a clean ground
terminal on the vehicle. Plug the 8 pin connector in transmission
and the speed sensor gray connector to the transmission.