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Old 09-08-2013, 11:07 AM   #1
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Truck Temps When Towing

Two weeks ago I was pulling our 6,800# dry 26RLs with the 2013 Ram 1500. I'm guessing somewhere around 7,600 loaded. I took two shots of the gauges while towing.


The first was taken about 30 minutes into the trip. The first 15 minutes was just side streets and secondary roads. The second 15 minutes was on the highway doing about 55-60.





The shot below was taken about 40 minutes later after sitting in stop and go traffic for about 20 minutes.

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Old 09-08-2013, 05:37 PM   #2
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Temps will heat up when you're sitting or driving in stop and go conditions. Air not moving thru the radiator. Your temps even in the 2nd pic are well within safe operating ranges. My Silverado's normal temp [w/o TT] for the coolant is 208-210. Tran temp around 180 - 190. Pulling the TT [about same weights as your's] the coolant stays about the same but the tran temp will up to 195 - 210 on the highway at 60/65 mph and smooth driving. Will run cooler if AC is off. When hill climbing or several accelerations dtran temps may go up to as high as 220 or 225 but will quickly cool back to 210 or so when the driving calms down. When the tran temp goes up so does the coolant [210 up to maybe 215 or so]. My GM dealer [service tech] said tran temps even higher than 230 isn't a problem and isn't going to damage anything. I had similar increase in temps with our old TT. I think the key is to keep speed around 60 or 65 and slow down when climbing and such. If temps go up more than your comfortable with, turn off the AC for a while and or pull over at the next rest area or exit and let things cool off. I always run the engine for 5 minutes or so after stopping as this will keep the coolant circulating and bring your temps down faster with engine running at idle.

My Silverado has the mid sized v8 with towing package. I know I'm going to be running close to max weight ratings with the bigger WH so will work on keeping speeds down and avoid excessive passing or abrupt accelerations.
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Old 09-08-2013, 08:20 PM   #3
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Hey Bass,

Hope your service guy is right. I was pulling some scary transmission temps last weekend the highest being 231*.

FYI: 2013 Silverado Crew 5.3 pulling a 2013 28BHS

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Old 09-09-2013, 05:45 AM   #4
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I always run the engine for 5 minutes or so after stopping as this will keep the coolant circulating and bring your temps down faster with engine running at idle.
That is great advice and I always do this when pulling hard. One thing for the Dodge/Ram owners to remember is to set the parking brake and leave the trans in neutral to circulate tranny fluid and cool that as well. They don't circulate in park unless the new 6 and 8 speeds do. I know the 545RFE and all the older versions do not. GM's and Toyotas do circulate trans fluid circulate in park.
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Old 09-09-2013, 09:47 AM   #5
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I had a Dodge 1500. I would weigh your Dodge at a CAT scale when loaded. I would bet you will be over at least one of your weights. We ended up trading in the Dodge for a one ton SRW truck. Much safer! It was very sad for me because we bought the travel trailer based on the Dodge tow capacity.
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Old 09-09-2013, 10:15 AM   #6
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Truck Temps When Towing

We are towing the Eagle HT 5th wheel which is close to 7000 lbs.
In New Brunswick hilly terrain

I watch it closely and in the summer heat it's never gone above 185
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Old 09-09-2013, 10:18 AM   #7
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Truck Temps When Towing

Notice the RPM, going uphill. Average RPM stays around 2000
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Old 09-09-2013, 01:24 PM   #8
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I've hit the 230 mark here and there too. Mainly after a big hill or curves requiring a lot of accelerations. Always make sure to take action to get it down including turning off the AC, slowing down to 60, or making a stop for a cool down. The service tech was confident that temps above 230 still weren't a problem for a few minutes. Considering that my regular coolant temp is right at 210, the tran is going to head that direction pretty quick. Does any body know if a tstat set for 190 [lower than 210] might help by opening the things up at a lower temp? The tech said the 210 setting was normal for the vehicle and the engine was designed to operate best at that temp.
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Old 09-09-2013, 02:20 PM   #9
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Originally Posted by grayco View Post
Hey Bass,

Hope your service guy is right. I was pulling some scary transmission temps last weekend the highest being 231*.

FYI: 2013 Silverado Crew 5.3 pulling a 2013 28BHS

Marty
According to an "Allison Fluids Engineer" on Diesel Place theie Transynd fluid can run all day at 250 and even hit occasional peaks of 350. Not sure which tranny you have, but GM's fluid should not be too far below that.
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Old 09-09-2013, 02:28 PM   #10
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According to an "Allison Fluids Engineer" on Diesel Place theie Transynd fluid can run all day at 250 and even hit occasional peaks of 350. Not sure which tranny you have, but GM's fluid should not be too far below that.
I read the same thing about Transynd. I exchanged my GM fluid for Transynd, two drain and fills to get all the fluid out of the tourque converter, per his instructions. Now I replace the spin-off filter every 15k miles or so, top off Transynd, and good to go.

In my 1/2 ton, 230* wasn't too uncommon, but the DMax rarely hits 210 and is typical in 185 range. Even mountain towing.
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