Re: 46RE hit 260F in 2003 CTD - cooling suggestions?
[Re: Tom_440]
#2370537
09/14/17 04:15 AM
09/14/17 04:15 AM
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Joined: Aug 2003
Posts: 43,123 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,123
Bend,OR USA
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Most American made petroleum based ATF has a dye in it that will start to change colors from red to brown at 275F, and go to black at 325 F What colors is your fluid on the stick now? If your running pure synthetic based ATF it won't start to be hurt until above 500 F I use to see around 230 F on my 1998 1/2 Ram 2500 CTD pulling the Baker grade in August in the afternoon going to the drag strip in L.V. at 70 MPH kicked out of O.D. running the air conditioner pulling my 24 Ft Pace Shadow enclosed race trailer with the car and other goodies in it. That trailer weighed right at 9200 Lbs. disconnected from the truck on a certified CA state scale with my 3200 Lb race car in it My trans .temp sending unit was in the front servo where the CTD registry recommends using them I had it in the bottom left front corner of the trans pan originally and I didn't see any difference in the temperature moving the sender up into the front servo port access plug hole That truck used the ATF+3 fluid in it. Around town in the summer or winter running empty it would never get above 140F no matter how hard I drove it It did have the factory towing package on it also. When ever I hooked up the race trailer to it the trans temps. went up to 180 empty or full towing on the flats My main message is if your trans. fluid color and smell is okay your probably okay
Last edited by Cab_Burge; 09/14/17 04:20 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 46RE hit 260F in 2003 CTD - cooling suggestions?
[Re: Tom_440]
#2370679
09/14/17 01:17 PM
09/14/17 01:17 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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While hauling about 9k, the trans temp climbed to 260 this weekend. Is there anything else I should be looking at to keep the fluid cooler? 260 sure seems high to me. I would keep it simple & add some extra coolers in the line in series exposed to good airflow
live every 24 hour block of time like it's your last day on earth
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Re: 46RE hit 260F in 2003 CTD - cooling suggestions?
[Re: A727Tflite]
#2372370
09/17/17 08:40 PM
09/17/17 08:40 PM
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Joined: May 2003
Posts: 13,185 aZLiViN
J_BODY
I Live Here
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I Live Here
Joined: May 2003
Posts: 13,185
aZLiViN
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The governor transducer and governor solenoid are independent of the thermistor. The thermistor is part of the harness for both the solenoid and transducer - that's all. no.... pretty dang sure that isn't all. DESCRIPTION Transmission fluid temperature readings are supplied to the transmission control module by the thermistor. The temperature readings are used to control engagement of the fourth gear overdrive clutch, the converter clutch, and governor pressure. Normal resistance value for the thermistor at room temperature is approximately 2000 ohms. The thermistor is part of the governor pressure sensor assembly (2)(Governor Pressure Sensor) and is immersed in transmission fluid at all times.
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Re: 46RE hit 260F in 2003 CTD - cooling suggestions?
[Re: Tom_440]
#2372474
09/18/17 12:50 AM
09/18/17 12:50 AM
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Joined: May 2003
Posts: 13,185 aZLiViN
J_BODY
I Live Here
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I Live Here
Joined: May 2003
Posts: 13,185
aZLiViN
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whew!!.... either way, that truck pulling a 9k trailer in Vegas (no real grades) should not see that temp, not even on the hottest of summer days... no where close. Which brings to mind OP.... what does the harness look like going into the trans? Many of them leak and eventually turn the wiring insulation into jello which can result in contact between circuits. Just one of a many of possibilities. I tend to think this may be more of an electrical issue. Odds are that if you had something "going away" it would have reared it's ugly head on the Cajon or Baker grade. Please let us know what you find Tom J
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