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Oil temperatures, empty vs towing

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Olive2020

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I haven't seen much info on transmission & engine oil temperature with the new 6.4L & ZF 8 speed combo.

1st question: For the Tradesman guys, have you been able to display transmission or engine oil temperature in the Instrument Cluster Display? If so, how?

2nd question: What is your empty trans temp given the terrain verse loaded temps?


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My empty rig- 2020 Olive CCSB Tradesman
 
I've not seen that info in any of the menus on my 2019, if there are temp sensors in those circuits, they might be readable through OBD II live data. I'll try to take a look with my reader plugged in later today. Anyway, I'll be following this post now that you have my curiosity up.
 
surprised the gasser doesnt have the gauges in the evic for oil temps.
 
My '15 Tradesman gasser showed oil and trans temp in the gauge summary in the EVIC, and you could scroll to individual gauges for both. Surely they didn't eliminate that.
 
For anyone that did not know, the Electronic Vehicle Information Center (EVIC) does have this information. Once in the Vehicle Information screen (Vehicle Info home screen showed tire pressure for me) simply scroll over to see engine oil temp, trans temp, batter voltage, or a summary.

I guess this shows how little experience I have with newer Rams. I came from a 1999 F350 superduty 7.3, so quite the learning curve with all the digital features.

Thanks all for the replies.
 
For your other question, I’m topping out at 168 for trans temp this morning after 30 minutes of relatively flat city driving, 68F outside. I’ll try to remember next time I tow.
 
Generally, engine oil temps should stick pretty close to engine coolant temp. Under heavy load/hills you will watch the engine oil temps go up compared to the engine water based coolant, but once the hard pull is over the two should nearly equalize again as the water based system pulls the heat away and sheds it to air.

You actually do a lot of cooling and heat dissipation through oil that gets transferred off to the block, and the water based coolant controls and carries away that heat and transfers it to the air via radiator. On the Cummins versions, you have engine oil squirters (nozzles) that blast the underside of the piston head following cumbustion, this pulls heat away from the piston and allows for more heat tolerance of the piston head and skirt. I wonder if the 6.4L does the same? I've had modern light commercial Cummins CR 5.9 engines apart to see this, but never a modern medium duty gas engine.
 
Lary0071 said:
Generally, engine oil temps should stick pretty close to engine coolant temp. Under heavy load/hills you will watch the engine oil temps go up compared to the engine water based coolant, but once the hard pull is over the two should nearly equalize again as the water based system pulls the heat away and sheds it to air.

You actually do a lot of cooling and heat dissipation through oil that gets transferred off to the block, and the water based coolant controls and carries away that heat and transfers it to the air via radiator. On the Cummins versions, you have engine oil squirters (nozzles) that blast the underside of the piston head following cumbustion, this pulls heat away from the piston and allows for more heat tolerance of the piston head and skirt. I wonder if the 6.4L does the same? I've had modern light commercial Cummins CR 5.9 engines apart to see this, but never a modern medium duty gas engine.
Click to expand...
Yes, the truck 6.4 has piston squirters. My '15 6.4 oil temp would get into the 245'+ realm when pulling heavy on a long grade. Trans stayed generally in the 170 realm, but that was the 66RFE, not the ZF 8 speed.
 
1HasBeen said:
Yes, the truck 6.4 has piston squirters. My '15 6.4 oil temp would get into the 245'+ realm when pulling heavy on a long grade. Trans stayed generally in the 170 realm, but that was the 66RFE, not the ZF 8 speed.
Click to expand...
I had the 2017 1500 5.7L/3.92 with the ZF 8 speed, and from what I've read this is an updated version of that ZF, essentially the internals were slightly tweaked but essentially the same product.

I put over 15,000 towing miles on that (it recorded towing miles separate) in 2.5 years, and that transmission was phenomenal. I'd say that it's the very best transmission I've ever had the pleasure of owning. It towed me tractor/loader/backhoe, 16' dump trailer, large skid steer, my 28' camper, car hauler and utility trailer. No matter how grossly over loaded the truck was, the transmission took it like a champ. It engine braked great, shifted quick and firm every time and kept the 5.7L engine singing on the proper part of the power curve for what load and slope we were on.

Amazingly great transmission, especially considering...... You know.... Mopar and all....

I hope that this beefed up version is just as good.

Sent from my SM-N960U using Tapatalk
 
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