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Excessive oil temperatures

S

sallieric

New Member
Jan 22, 2023
6
2
Truck Year
2018
We used to have a problem with our transmission overheating while towing. We replaced the transmission heater and solved the problem. Now the engine oil temperatures are excessive while towing. The trailer we are towing is well within the towing weight for the truck.
 
TC Diesel

TC Diesel

Well-Known Member
Jul 14, 2016
2,494
712
Truck Year
2015
All Ram 3.0 VM have two Heat exchangers 1 for lube the other for Trans Fuild, it's really a shifty design and prone to failure.... the Temps are controlled by 3-way Coolant Valve.
 
S

sallieric

New Member
Jan 22, 2023
6
2
Truck Year
2018
We replaced the transmission heater because after 20000 on a new truck, the transmission started overheating while pulling a trailer. The dealer did nothing to fix the problem. At that time oil temperatures were low while the transmission got to 275. It never through a code. Now the transmission temperature is great while oil temperatures get too high.
 
John Jensen

John Jensen

Well-Known Member
Mar 22, 2016
946
486
Truck Year
2016
TC Diesel said:
All Ram 3.0 VM have two Heat exchangers 1 for lube the other for Trans Fuild, it's really a shifty design and prone to failure.... the Temps are controlled by 3-way Coolant Valve.
Click to expand...
I thought the ECo would defuel if oil hit 255. His didn't. Guess I have wrong info
 
TC Diesel

TC Diesel

Well-Known Member
Jul 14, 2016
2,494
712
Truck Year
2015
John... Never heard that...Defueling would not lower the Temps... only the power..... if the source is 1500diesel.XXX Mods is equivalent to CNN fake information.
 
S

sallieric

New Member
Jan 22, 2023
6
2
Truck Year
2018
Our truck has never defueled when the oil temperature was 260. It did when the transmission was overheating.
 
John Jensen

John Jensen

Well-Known Member
Mar 22, 2016
946
486
Truck Year
2016
TC Diesel said:
John... Never heard that...Defueling would not lower the Temps... only the power..... if the source is 1500diesel.XXX Mods is equivalent to CNN fake information.
Click to expand...
sallieric said:
Our truck has never defueled when the oil temperature was 260. It did when the transmission was overheating.
Click to expand...
Maybe I got my oils mixed up. Maybe it's tranny oil that will defuel at 255 or ??
sallieric, do you remember what temp the tranny oil refueled at?
 
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