[tex2001diesel]

Well, I thought the Tranny was going out on a trip back from N. W. New Mexico. Tranny started to shift rough in the 3rd to 4th gear and lock up. took it to the tranny shop and they pulled a code for throttle position sensor malfunction. The tranny shifts fine now and the next day after the incident. Is this possible? I was told it is a fly by wire accelerator pedal. Has anyone had this problem before? Thanks in advance.

 

[socalgn]

The accel pedal is a variable potentiometer that sends a signal to the PCM based on the amount of pressure put on the pedal. There is no traditional accelerator cable on these trucks.

Yes, a faulty signal from the pedal can give you erratic throttle response.

 

[olddieseldude]

The accel pedal is a variable potentiometer that sends a signal to the PCM... Yes, a faulty signal from the pedal can give you erratic throttle response.

...and those signals sent to the PCM will influence the decisions that the PCM makes about shifting the transmission.

 

[socalgn]

...and those signals sent to the PCM will influence the decisions that the PCM makes about shifting the transmission.

.....and the leg bone's connected to the thigh bone.......:lol:

 

[olddieseldude]

.....and the leg bone's connected to the thigh bone.......:lol:

Yep!

The PCM knows all and tells all...,LOL!