Just put a set of gauges in my truck, 05 cummins automatic with Banks Engine Brake. We are headed out Monday for a 6 week cruise around the Midwest from California. GVW should be around 18k. What kind of temps are normal and what would be concerns?First time pulling this trailer I pulled from Clearlake California to Redding and back last month and the transmission temp high was 154 and manifold temp high was about 870 at 24 pounds boost in the mountains. Flat land it never got over 140/670/4 with cruise set at 55 mph, California max for towing. Thanks in advance for your feedbackSam

Boy those temps sound low to me. You should have no problems at all if you get that kind of temp. Even if it gets over a 100 you should still be very low on temps in the truck. That part of California are in the tipple digits for the next few days but I don't think the high temps will last. At any rate you should be good to go.

Sam, where is the trans temp taken, Outlet line to cooler? in the Pan? it makes a difference in the temp of course. On our last Dodge an 03(3500) with a mild upgrade the temps were IIRC a lot higher, trans going down the road 170's, EGTs climbing the Siskiyus I had to back off to get the EGTs below 1200, and boost would run somewhere around 22 pounds.So it sounds like your doing fine with those temps, although Clear Lake to Redding is not very mountainous IIRC?? Try Clear Lake to Salem Or for some hills LOLGood Luck and have fun on your trip:)

Yeah those temps are awfully low. Mine is hotter than that just driving it to town with no load. I'd like to know where the sensors are.

Where is the EGT temp? Pre or post turbo? Last I read automatics have seconds to live when above 250degrees. Under 200 degrees is preferred. If your EGT is preturbo your running cool. Keep the EGT under 1200deg preturbo. Technically your engine should have no problem with 1200deg preturbo. However, there is manufacturing differences from gauge to gauge. Did you monitor the back 3 cylinders vs the front 3 cylinders? I prefer not to run my equipment at 100%. Keeping it under 1200deg preturbo would be considered safe.

srt20 wrote:Yeah those temps are awfully low. Mine is hotter than that just driving it to town with no load. I'd like to know where the sensors are.OP doesn't say what ambient air temp. was where he was driving.My 05 3500 typically runs 160-180 transmission temp in 70 to 90 degree ambient temps (temp sensor is in the pan) and 190-210 degrees coolant temp in the same ambient range.

truck temps | Good Sam Community

srt20
Explorer
May 14, 2014
Yeah those temps are awfully low. Mine is hotter than that just driving it to town with no load.
I'd like to know where the sensors are.
beaslwd
Explorer
May 14, 2014
Sam, where is the trans temp taken, Outlet line to cooler? in the Pan? it makes a difference in the temp of course. On our last Dodge an 03(3500) with a mild upgrade the temps were IIRC a lot higher, trans going down the road 170's, EGTs climbing the Siskiyus I had to back off to get the EGTs below 1200, and boost would run somewhere around 22 pounds.
So it sounds like your doing fine with those temps, although Clear Lake to Redding is not very mountainous IIRC?? Try Clear Lake to Salem Or for some hills LOL
Good Luck and have fun on your trip:)
diazr2
Explorer
May 14, 2014
Boy those temps sound low to me. You should have no problems at all if you get that kind of temp. Even if it gets over a 100 you should still be very low on temps in the truck. That part of California are in the tipple digits for the next few days but I don't think the high temps will last. At any rate you should be good to go.

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