Transmission Temp

Fox1903 · Oct 22, 2022

New to the site. Recently purchased a 2016 Ram 2500 with the 6.7 Cummins 110,000 miles. My transmission temp is running 202-203 on interstate not towing or hauling anything. Outside temp 70 degrees running 70-75mph. Also thought I felt it slip slightly when I pulled up the driveway when I got home. I know this is high per other posts regarding normal transmission temps. I do not know when the transmission has been serviced. Would it be a good idea to have this done first (fluid change, etc.) or what route would be the best to take? Will be towing boats in the spring and summer.

18CrewDually · Oct 22, 2022

Slipping would cause excessive heat but going down the highway torque converter locked in OD you would know if it slips when you full throttle it and rpms overly increase. Inspect the fluid for color and smell. If its black and smells burnt bad then you may be experiencing slipping. If the color isn't too bad and no signs of burnt material I'd service it with fresh filter and fluid. DO NOT use any "flush" products. Strictly refill with appropriate fluid.
If your temps remain higher than normal I'd suspect the thermostat is failing to open enough to cool it.
Theres many companies that make new by-pass units but heres a link to one that describes it. The unit is easy to replace and sits along the passenger side of the transmission near the engine. Also unloaded my dually runs around 165°.

Mishimoto MMTC-RAM-TBVFF Full-Flow Transmission Thermal Bypass Valve

Check out the deal on Mishimoto MMTC-RAM-TBVFF Full-Flow Transmission Thermal Bypass Valve at XDP

www.xtremediesel.com

06 Dodge · Oct 22, 2022

Here is one 12 dollars cheaper and I trust Dave Goerend when it comes to trans parts: https://goerend.com/68rfe-full-flow-cooler-link-2013-18/

Fox1903 · Oct 22, 2022

Thank you for the information. No RPM issues at all. Will proceed with the fluid route. Appreciate the assistance!

Dinky · Oct 23, 2022

18CrewDually said:
Slipping would cause excessive heat but going down the highway torque converter locked in OD you would know if it slips when you full throttle it and rpms overly increase. Inspect the fluid for color and smell. If its black and smells burnt bad then you may be experiencing slipping. If the color isn't too bad and no signs of burnt material I'd service it with fresh filter and fluid. DO NOT use any "flush" products. Strictly refill with appropriate fluid.
If your temps remain higher than normal I'd suspect the thermostat is failing to open enough to cool it.
Theres many companies that make new by-pass units but heres a link to one that describes it. The unit is easy to replace and sits along the passenger side of the transmission near the engine. Also unloaded my dually runs around 165°.

Mishimoto MMTC-RAM-TBVFF Full-Flow Transmission Thermal Bypass Valve

Check out the deal on Mishimoto MMTC-RAM-TBVFF Full-Flow Transmission Thermal Bypass Valve at XDP

www.xtremediesel.com

I installed one of these on my 22' right away. I was towing 5k in 38deg weather and not even working my truck 198deg. Not even 2000 miles on it Dropped temperature on average 20degs.

Fox1903 · Oct 23, 2022

Sounds like a good route to take. Thank you.

joelmic · Oct 23, 2022

What's trans temp supposed to be?

Fox1903 · Oct 23, 2022

I’ve found information saying 160-180. Haven’t found a specific number just a range.

Transmission Temp

Fox1903

Junior Member

18CrewDually

Senior Member

Mishimoto MMTC-RAM-TBVFF Full-Flow Transmission Thermal Bypass Valve

06 Dodge

Senior Member

Fox1903

Junior Member

Dinky

Senior Member

Mishimoto MMTC-RAM-TBVFF Full-Flow Transmission Thermal Bypass Valve

Fox1903

Junior Member

joelmic

Senior Member

Fox1903

Junior Member

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