In need your insight guys my daily driver 07 classic lbz duramax with the 6spd allison transmission took a dump as I was taking off from a red light @about 5-10mph i heard a loud claack and truck went to neutral stoped on the side of the road thinking it was the shaft and nothing everything looks good truck lost all gears wont move even on 4x4 engine turns on perfect but when i drop it on gear i get clacking noises in the trans\tranfer area what could have broke???

Side note truck seems to be in neutral on all gears even on park i can still move/ push it...

Any help is appreciated thanks

 

Stab in dark without seeing it but sounds like input of transfer case let go... When you put it in park with engine running can you hear the parking pawl trying to catch??

 

Yeah it grinds bad idk if i should take it apart an see what it looks like in the tc

 

Sounds like tcase