I have a 2001 Chevy 2500HD with the 8.1 gasoline engine and Allison transmission. Randomly shows transmission hot light and gauge pegs out at 300+ degrees, truck goes in limp mode. Sometimes happens after sitting overnight and before driving a mile so fluid cannot be hot. I have replaced the transmission temperature sensor and wiring harness inside the transmission. Parts were from Allison not aftermarket. Fluid is GM as are both filters. Plugs in the TCM have been cleaned and dielectric grease applied. No rhyme or reason as to when this will .happen. Sometimes when light comes on I can stop the truck and shut it off then restart and everything normal. Sometimes if I just keep driving after it comes on the light will go off and the temp hand go to the lowest end of the scale. Just trying to find out if it sounds like a TCM problem or a cluster problem as has been suggested. Thanks for taking the time to read this long message and hopefully you can help with the problem
If you scan the vehicle for codes let us know what those codes are. The OBDII scan tool would have to be capable of communicating with the TCM. The Allison TCMs for 01-05 vehicles do go bad so we can do a bench test and refurbish that if we find faults with it.
If I bring it in could you possibly test it while I'm there? I'm in Alabama and wouldn't mind the trip. If it shows to need repair I would leave it and you could ship it back to me when fixed. Thanks for your help
You're most certainly welcome to drop it off, it takes 1-2 business days to run diagnostics on it and we can mail it back to you with no problem. Just make sure to mention that when you drop it off.
I have a 2001 Chevy 2500HD with the 8.1 gasoline engine and Allison transmission. Randomly shows transmission hot light and gauge pegs out at 300+ degrees, truck goes in limp mode. Sometimes happens after sitting overnight and before driving a mile so fluid cannot be hot. I have replaced the transmission temperature sensor and wiring harness inside the transmission. Parts were from Allison not aftermarket. Fluid is GM as are both filters. Plugs in the TCM have been cleaned and dielectric grease applied. No rhyme or reason as to when this will .happen. Sometimes when light comes on I can stop the truck and shut it off then restart and everything normal. Sometimes if I just keep driving after it comes on the light will go off and the temp hand go to the lowest end of the scale. Just trying to find out if it sounds like a TCM problem or a cluster problem as has been suggested. Thanks for taking the time to read this long message and hopefully you can help with the problem
i have the same problem. i would get both orange and red lights hot idle and trans fluid hot. i replaced filters and trans fluid temp sensor. got it all back together cleared the codes. started it and it wouldnt go into any gears. then the codes p0700, p0701, p1713 popped up. I never had a trans control module code ever pop up. does that now mean my fluid temperature sensor is good and the trans control module was the problem all along? And if i replace the tcm i i have to get it reprogrammed?
Thank you for contacting us. We specialize in repairing faulty electronic components. If your mechanic has informed you that you have a faulty unit, you can send it to us for a rebuild. If you are unsure whether your unit is faulty, we can perform a bench test for a nominal fee of $39.99. Should we determine that the unit is indeed faulty, we will charge you our standard repair price. Unfortunately, we are unable to pinpoint the exact issue remotely.
Our company offers repair services for a wide range of electronic modules, even if the specific repair service is not listed on our website. If you have a particular part that requires repair, please do not hesitate to contact us directly. We are committed to assisting our customers with their automotive needs and are always happy to help. Thank you for considering UpFix for your repair requirements.
