Chrysler 47RE info
Posted: Thu Jan 22, 2009 4:06 pm
Hi,
I'm building a 1999 47RE (rwd) trans for my 70 Barracuda that I would like to control. The engine (440) is setup with MS-II/EDIS and a wideband. I have some good (and what I hope is enough) info on the electronic control system.
It has:
Trans fluid temp sensor
Governor pressure sensor
Governor pressure solenoid
O/D (3-4) Shift Solenoid
TCC Solenoid
Output Speed Sensor
And a Park/Neutral Switch.
Some of the function info I've found: (from chrysler training material and service info)
The governor pressure sensor measures output pressure of the governor pressure
solenoid valve. This feedback is needed by the PCM to accurately control pressure.
The unit is an absolute pressure device and the output is calibrated to be .35 to .65
volts at 14.7 psi (normal barometric pressure). Since this is an absolute pressure
device, 0 psi calibration is required often to compensate for changing atmospheric
pressure or altitude. This voltage measured at 0 psi is referred to as zero pressure
offset.
Governor pressure should be no more than 3 psi at curb idle speed and wheels not
rotating. If pressure exceeds 3 psi, a fault exists in the governor pressure control
system. Governor pressure under acceleration should increase proportional to
vehicle speed. Approximately 1 psi for every 1 mph.
The (governor pressure) solenoid valve regulates line pressure to produce governor pressure. The average
current supplied to the solenoid valve controls governor pressure. One amp current
produces zero psi governor pressure. Zero amps sets the maximum governor
pressure. Current is regulated by modulation of the pulse width of a 512 hz driver
frequency (512 cycles per second).
The purpose of the transmission temperature sensor is to provide transmission fluid
temperature information to the PCM. The PCM uses this information to control
engagement of the fourth gear overdrive clutch, the converter clutch, and governor
pressure. The normal resistance value for the thermistor at room temperature is
approximately 1000 ohms for transmissions built prior to the 2002 model year. The
resistance value for late model transmissions has been increased to 2000 ohms. The
thermistor is part of the governor pressure assembly and is immersed in
transmission fluid at all times (fig. 60). It is a negative temperature coefficient
thermistor.
I am in the process of setting up this combo on a stand where I can run the engine and transmission. I have a lab scope, DVOM that reads Hz and extra time at my disposal. If there is anything I could contribute to help further the project along or if you are in need of any additional beta testers, please let me know.
Thanks!
Eric
I'm building a 1999 47RE (rwd) trans for my 70 Barracuda that I would like to control. The engine (440) is setup with MS-II/EDIS and a wideband. I have some good (and what I hope is enough) info on the electronic control system.
It has:
Trans fluid temp sensor
Governor pressure sensor
Governor pressure solenoid
O/D (3-4) Shift Solenoid
TCC Solenoid
Output Speed Sensor
And a Park/Neutral Switch.
Some of the function info I've found: (from chrysler training material and service info)
The governor pressure sensor measures output pressure of the governor pressure
solenoid valve. This feedback is needed by the PCM to accurately control pressure.
The unit is an absolute pressure device and the output is calibrated to be .35 to .65
volts at 14.7 psi (normal barometric pressure). Since this is an absolute pressure
device, 0 psi calibration is required often to compensate for changing atmospheric
pressure or altitude. This voltage measured at 0 psi is referred to as zero pressure
offset.
Governor pressure should be no more than 3 psi at curb idle speed and wheels not
rotating. If pressure exceeds 3 psi, a fault exists in the governor pressure control
system. Governor pressure under acceleration should increase proportional to
vehicle speed. Approximately 1 psi for every 1 mph.
The (governor pressure) solenoid valve regulates line pressure to produce governor pressure. The average
current supplied to the solenoid valve controls governor pressure. One amp current
produces zero psi governor pressure. Zero amps sets the maximum governor
pressure. Current is regulated by modulation of the pulse width of a 512 hz driver
frequency (512 cycles per second).
The purpose of the transmission temperature sensor is to provide transmission fluid
temperature information to the PCM. The PCM uses this information to control
engagement of the fourth gear overdrive clutch, the converter clutch, and governor
pressure. The normal resistance value for the thermistor at room temperature is
approximately 1000 ohms for transmissions built prior to the 2002 model year. The
resistance value for late model transmissions has been increased to 2000 ohms. The
thermistor is part of the governor pressure assembly and is immersed in
transmission fluid at all times (fig. 60). It is a negative temperature coefficient
thermistor.
I am in the process of setting up this combo on a stand where I can run the engine and transmission. I have a lab scope, DVOM that reads Hz and extra time at my disposal. If there is anything I could contribute to help further the project along or if you are in need of any additional beta testers, please let me know.
Thanks!
Eric