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 > Revmax 68RFE Transmission Cooler Thermostatic Bypass

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ShinerBock

SATX

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Posted: 07/18/19 01:29pm Link  |  Quote  |  Print  |  Notify Moderator

cummins2014 wrote:



How close do you watch it ? Towing mine always seems to be in the 170's. But for $119 , why not ?. Can it hurt ???????


FYI, the install is very easy and takes about 10 minutes or less. Just unscrew the fittings on the trans side and the cooler side has c-clips. You will loose about a half a quart of ATF+4 so be sure to pick up a quart and a small enough funnel to add through the dipstick before install.

IdaD

Idaho

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Posted: 07/18/19 02:06pm Link  |  Quote  |  Print  |  Notify Moderator

cummins2014 wrote:

IdaD wrote:

ShinerBock wrote:

IdaD wrote:

What temps were you seeing when you were towing stock versus now? My truck is totally stock and I've never had problems with the trans overheating.


Mid 180F depending on outside temps. It is not uncommon to get up to 110F here in south Texas. It is also very intermittent too. Sometimes it will go passed 175F and towing the same trailer in the same conditions another day will never even get to 175F which leads me to believe I may have had a valve that was partially stuck every now and then. Now it stays in around 160F when towing.


Interesting. Mine seems to consistently run around 168 towing regardless of outside temperature.



How close do you watch it ? Towing mine always seems to be in the 170's. But for $119 , why not ?. Can it hurt ???????


Sometimes I have the temps up on the EVIC in which case I keep a pretty close eye on it, other times I have the speedo up on the EVIC. I've towed with it 4+ years so I think I have a pretty good handle on how it behaves at this point. We're typically in the 19-20k lb combined range so I'm not working it as hard as a lot of people.


2015 Cummins Ram 4wd CC/SB


ShinerBock

SATX

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Posted: 07/18/19 02:38pm Link  |  Quote  |  Print  |  Notify Moderator

IdaD wrote:



Sometimes I have the temps up on the EVIC in which case I keep a pretty close eye on it, other times I have the speedo up on the EVIC. I've towed with it 4+ years so I think I have a pretty good handle on how it behaves at this point. We're typically in the 19-20k lb combined range so I'm not working it as hard as a lot of people.



My brother was the same way until several weeks ago. Never got up that high when towing or even in park for the past few years he has owned it. It just started happening in the past few months.

He has a CTS2 monitor like I do and he has it set to alert him when temps get to 200F. He had the truck in park while hooking up his RV and he said that he heard the alarm go off about five minutes after putting it in park. Got to his truck and the trans was at 200F so he shut the truck off while hooking everything else up. It happened to him again while he was stuck in traffic a few weeks later.

He also said his temps were hotter than normal when towing as well which is why we were thinking that the thermostat in the bypass was broken and remained closed or partially closed. He was going to replace it with another stock unit, but didn't want to take the chance if it failing in a situation where he cannot easily replace it so for $60 more he went with the Revmax unit that has the thermostat deleted.

C Schomer

Pueblo West, Co.

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Posted: 07/19/19 09:28pm Link  |  Quote  |  Print  |  Notify Moderator

My 12 had max tow with the welded plate exchanger and t-stat block and it was the worst example of oil cooling I ever saw. I got rid of the stat and welded plate earlier this year and used a fan powered Derale cooler and it is Muy Bueno. Craig

cummins2014

Utah

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Posted: 07/21/19 10:08am Link  |  Quote  |  Print  |  Notify Moderator

ShinerBock wrote:

cummins2014 wrote:



How close do you watch it ? Towing mine always seems to be in the 170's. But for $119 , why not ?. Can it hurt ???????


FYI, the install is very easy and takes about 10 minutes or less. Just unscrew the fittings on the trans side and the cooler side has c-clips. You will loose about a half a quart of ATF+4 so be sure to pick up a quart and a small enough funnel to add through the dipstick before install.


I am tempted ,although have not seen anything alarming , but I don't watch it all the time . I do towing slow thru town ,or mountain grades .

Got an Alaska trip planned starting first of June next year for three months , I am sure I will be pulling some pretty good grades with the fifth wheel on that trip. That Cummins will get a good workout [emoticon]

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