Tough question? (Trans temp)
08-23-2008, 01:02 AM
#16
Registered User
From the shop manual
...............................
The oil pressure gauge gives an indication to the
vehicle operator of the engine oil pressure. This
gauge is controlled by the instrument cluster circuit
board based upon cluster programming and electronic
messages received by the cluster from the Engine Control Module
(ECM) on vehicles equipped with a diesel engine over
the Programmable Communications Interface (PCI)
data bus The instrument
cluster circuitry restricts the oil pressure gauge
needle operation in order to provide readings that
are consistent with customer expectations. Each time
the cluster receives a message from the PCM or ECM
indicating the engine oil pressure is above about 41
kPa (6 psi) the cluster holds the gauge needle at a
point near the middle increment within the normal
range on the gauge scale.
...............................
The oil pressure gauge gives an indication to the
vehicle operator of the engine oil pressure. This
gauge is controlled by the instrument cluster circuit
board based upon cluster programming and electronic
messages received by the cluster from the Engine Control Module
(ECM) on vehicles equipped with a diesel engine over
the Programmable Communications Interface (PCI)
data bus The instrument
cluster circuitry restricts the oil pressure gauge
needle operation in order to provide readings that
are consistent with customer expectations. Each time
the cluster receives a message from the PCM or ECM
indicating the engine oil pressure is above about 41
kPa (6 psi) the cluster holds the gauge needle at a
point near the middle increment within the normal
range on the gauge scale.
Thanks N Johnson. There you have it. IT is a worthless gauge...that reads what Chrysler wants YOU the customer to think is "normal".
So the REAL oil pressure could be 6 psi or 106 psi.........who would know?
Geesh.......give me a gauge that means something. Or don't even bother.
..
08-23-2008, 08:35 PM
#17
Registered User
The highest tranny temp i have ever seen was around 230 and that was backing a loaded trailer uphill. It rarely goes over 200-210 towing and without a load usually in the 170-190 range. I would think 280 degrees is getting pretty darn hot but I don't know.
10-08-2012, 02:13 PM
#18
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Location: Alberta, Canada
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Does anyone know where the indication is getting its' signal from? Is it pan temperature, torque converter outlet temperature to the cooler/warmer or somewhere internally inside the transmission?
As it seems to me and others I've been chatting with this about 260-275F is quite hot. Like others have said, it's too late at that point and it' makes one wonder why they'd let it get that hot.
Thanks
As it seems to me and others I've been chatting with this about 260-275F is quite hot. Like others have said, it's too late at that point and it' makes one wonder why they'd let it get that hot.
Thanks
10-08-2012, 02:30 PM
#19
Registered User
Some use the pan but best location for instant feedback is the hot line coming out the tranny (passenger side) to the cooler.
Also seen up to 250*, backing a 10,000 lb up a slight grade.
RJ
10-09-2012, 12:51 PM
#22
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Well, if theres a factory light that comes on when the trans gets too hot wouldn't you think that there is a temperature indicator (TI) that triggers the computer to turn the light on? If so, where is that sensor located? Inside the trans right? I have a aftermarket gauge hooked up to the outlet of my torque converter and not once tripped the Trans Temp High light even when I've burried the gauge well past 250F climbing hills. So, there has to be a TI somewhere else within the transmission signalling the computer to trip the light on. A few guys I've spoke with have asked where this is and I can't answer that. My 2005 only has a warning light and I've never seen it on.
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