Transfer case isn't in neutral? Put it in 4wd and back to 2wd/awd to check if the TC is able to switch... if the lights keep flickering, it could be a transfer case issue and not a transmission issue.

Musta been one heck of a bump!

 

 

 

The no codes part is so weird. Even a cracked filter usually throws a P0841 or something.

There is an input sensor and an output sensor. The solenoids are inside the trans, but the plug for them is external.

Do you have 2wd? Or AWD?

 

Another thought - Did the bump disconnect your gearshift selector cable at the transmission? If you put the truck into N, does it roll? Or does it stay parked?

 

try this, disconnect the battery for 20 minutes and let everything clear, like and electrical component it may just need a reset.