There aren't any issues that can get by us when troublehshooting an issue at the shop, but this one we just can't resolve.
Transmission Hot is displayed on the cluster.
2006 Silverado SS, 2wd. 80e conversion.
Here's what we've done. Some of the easier things were done first, then as time passes, you start thinking of anything remotely possible that could be causing this.
Steps are not in order, just typing them as I remember.
- replaced the internal transmission harness and temperature sensor
- replace the transmission terminals on the main harness transmission connector
- replaced the two wires associated with the temp sensor
- replaced both pcm terminals related to temp sensor
- replaced pcm
- flash and tuned with a completely different calibration
- turned off the codes associated with the temp sensor
- adjust values in calibration that determines at what temperature the display will set
- swapped cluster
- blew trans lines out just to be sure
TRANSMISSION IS NOT RUNNING HOT! THE TRANSMISSION SHIFTS JUST FINE AND FIRM, NO SLIPPING NO OVERHEATING.
Temperature sensor is registering the correct temp and it's working, but for some reason the pcm wants to send the message, thru serial, that the trans is hot.
Everything electrical and mechanical has been replaced or swapped.
Using hptuners, there is a value under Trans Diag, that value allows the user to set the Hot Mode of the transmission, however, when this value is set to say 700 degs, it makes no difference, the Transmission Hot message still displays.
Duration for this code to set is 10mins, while driving and after ten minutes, it sets just as if the trans was hot. Changing any of these values in the calibration has no effect.
We always have bad luck with transmissions and converters, could these two possibly cause this issue?
Just a last minute addition: I tried my '05 avalanche cluster just to be sure, no trans temp gauge, but it still set around 175 degs.
thanks for any input,
allen