Trans running hot on 2005Ram 3500 Auto
We tow a horse trailer with our 2005 Ram 3500 dually auto. When towing in the mountains the trans temp will get up to 230 deg. as this year does not have the abililty to lock out the overdrive(both th...
Forum Discussion
I'm going to make many assumptions on this issue.
"I'm going to assume you are pulling the temperature from the OBD2 port, not the cooler line (hotter), and not the pan (cooler).
I'm going to assume that you do have the T/H enabled.
For all other replies; the '05 transmission T/H mode does NOT lock out overdrive. It does lock the TC in 3rd and at a lower speed in 4th.
freddmc, at what speed are you towing? If you are in hilly winding terrain if you slow down slightly the trans will hold 3rd longer. If you are powering hard out of a turn the TC will wait longer to lock up in 3rd, just ease up to about 20% throttle position then get back on it and the TC will hold."
Yes, you are correct,,I have a cts gauge off the obd2 port and we do have T/H enabled. This happened to my daughter last summer towing in hot weather in the mountains and she would have been travelling at 60. Other than in that I am sure she would have just kept her foot on the throttle and let the truck downshift automatically. So I am trying to get enough information to advise her what to do. I have been involved with cars/trucks/race cars for so long that I instintively know what to do in situations like that but its difficult for young people without that kind of experience.. Prior to the trip I had the trans serviced with a fluid change and band adjustment(not sure if it needed adjustment but it was at the dealer).Since then we put approx 8000 miles on it (just around town stuff)and the fluid is now discolored so the assumption is it got too hot and my daughter did say the CTS alarm went off(its set at 230) I was told on another forum that even in t/h mode and downshifting it is difficult to hold it in 3rd and t/c lockup.
I will look at the cooler bypass issue.
The option to have the TSB flashed is interesting as it will enable you to lockout OD thus keeping it in 3rd. What would be the downside to this option?
Thanks for all the replies.
Regards
Fred
"I'm going to assume you are pulling the temperature from the OBD2 port, not the cooler line (hotter), and not the pan (cooler).
I'm going to assume that you do have the T/H enabled.
For all other replies; the '05 transmission T/H mode does NOT lock out overdrive. It does lock the TC in 3rd and at a lower speed in 4th.
freddmc, at what speed are you towing? If you are in hilly winding terrain if you slow down slightly the trans will hold 3rd longer. If you are powering hard out of a turn the TC will wait longer to lock up in 3rd, just ease up to about 20% throttle position then get back on it and the TC will hold."
Yes, you are correct,,I have a cts gauge off the obd2 port and we do have T/H enabled. This happened to my daughter last summer towing in hot weather in the mountains and she would have been travelling at 60. Other than in that I am sure she would have just kept her foot on the throttle and let the truck downshift automatically. So I am trying to get enough information to advise her what to do. I have been involved with cars/trucks/race cars for so long that I instintively know what to do in situations like that but its difficult for young people without that kind of experience.. Prior to the trip I had the trans serviced with a fluid change and band adjustment(not sure if it needed adjustment but it was at the dealer).Since then we put approx 8000 miles on it (just around town stuff)and the fluid is now discolored so the assumption is it got too hot and my daughter did say the CTS alarm went off(its set at 230) I was told on another forum that even in t/h mode and downshifting it is difficult to hold it in 3rd and t/c lockup.
I will look at the cooler bypass issue.
The option to have the TSB flashed is interesting as it will enable you to lockout OD thus keeping it in 3rd. What would be the downside to this option?
Thanks for all the replies.
Regards
Fred
