NicksGarage
Senior Member
My 2009 1500 4x4 is intermittently having a problem with the transmission overheating when towing. Mostly when I'm towing, it's hot outside, and I'm in stop and go traffic or climbing hills. I recently went on a 1000+ mile camping trip towing my 3000 pound travel trailer and didn't have a problem. Drove 30 miles towing my empty car trailer and got stuck in construction traffic and transmission heated up enough to go into limp in mode. Last time was towing travel trailer 100 miles and once I got in slow traffic on the freeway, in 105 degree heat, the transmission went over 260 degrees according to the gauge and went into limp in mode. Stopped and ran it in neutral until it dropped to 180. Hit the road again and was fine until I got into traffic again. Eventually it just wouldn't cool down while towing the trailer and couldn't get up a hill. Disconnected the trailer and got it cooled down under 200 and it drove ok. Had the truck towed home. It's driving fine and no transmission heating issues driving around.
The cooler is part of the A/C condenser and I can't tell if it's flowing enough. Doesn't matter if the A/C is on or off and the truck has a mechanical fan.
I want to put in an aftermarket transmission cooler with a fan and see if that fixes my problem. There isn't much structure there in front of the radiator so I'm curious to see how other people have mounted coolers on these trucks. I'm ok with fabricating brackets if needed. I've seen some people mounting coolers under the truck next to the frame but I'd be worried about rocks hitting it or the fan.
Thanks for any replies.
The cooler is part of the A/C condenser and I can't tell if it's flowing enough. Doesn't matter if the A/C is on or off and the truck has a mechanical fan.
I want to put in an aftermarket transmission cooler with a fan and see if that fixes my problem. There isn't much structure there in front of the radiator so I'm curious to see how other people have mounted coolers on these trucks. I'm ok with fabricating brackets if needed. I've seen some people mounting coolers under the truck next to the frame but I'd be worried about rocks hitting it or the fan.
Thanks for any replies.
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