I have a 2015 Silverado with 105,000 miles on it. Did a full transmission flush about 3 months. Driving with no trailer for more than 2-3 hours at a time specifically in hill country the tranny temperature is running between 220 and 260 obviously very high. After a few hours if I am not babying it I will get the message " Transmission is hot let engine idle" If i let it idle for 60 seconds it drops 5-10 degrees and on the road again however the temp still remains way to high. If I am pulling a trailer of any kind flat bed, toy hauler it will over heat within 2 hours or so and again really having to baby it. I ran the computer on it and receive a Lost communications with TCM OBD-II trouble code. Now before i start swapping parts such as the TCM I am hoping for some ideas or suggestions with what is going on with it. Also occasionally maybe 3 times in the last year the rear tires with lock up in first gear for a 10th of a second just long enough to screech the tires. Once in a while there will be a hard shift doesn't matter if the truck is hot or cold and is rare but non the less happens.
Any ideas before I take it into the shop?
I have a 2015 Silverado with 105,000 miles on it. Did a full transmission flush about 3 months. Driving with no trailer for more than 2-3 hours at a time specifically in hill country the tranny temperature is running between 220 and 260 obviously very high. After a few hours if I am not babying it I will get the message " Transmission is hot let engine idle" If i let it idle for 60 seconds it drops 5-10 degrees and on the road again however the temp still remains way to high. If I am pulling a trailer of any kind flat bed, toy hauler it will over heat within 2 hours or so and again really having to baby it. I ran the computer on it and receive a Lost communications with TCM OBD-II trouble code. Now before i start swapping parts such as the TCM I am hoping for some ideas or suggestions with what is going on with it. Also occasionally maybe 3 times in the last year the rear tires with lock up in first gear for a 10th of a second just long enough to screech the tires. Once in a while there will be a hard shift doesn't matter if the truck is hot or cold and is rare but non the less happens. Any ideas before I take it into the shop?