Did you check the transmission fluid? And if so, please give it a smell to see if it has a burnt smell to it. If it does smell burnt a transmission service may help it, we should run the codes as well. These guides will help, and I have included the instructions for your truck in the images below.
https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
and
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
Fluid Types
Transmission Fluid Type
4R100 .................... MERCON V
4R70W .................... MERCON V
MERCON ATF is being replaced by MERCON V ATF as a service fluid, per TSB 06-14-4.
Capacities
Transmission Fluid
4R100 .................... 15.5L
4R70W .................... 13.1L
Note: Approximately Dry Fill Capacity
This video shows it as well.
https://youtu.be/HJdcWI6m3J4?si=FTjNhwkDU24UEl5q
Check out the images (below). Please let us know what happens.
Images (Click to make bigger)
Saturday, June 8th, 2024 AT 11:17 AM