I was driving normally then out of nowhere truck wasn’t going anywhere , pulled over and put it in park and grinded when put it in park , tried putting it in every gear and truck wouldn’t go in any gear nor move , put it in park and still grinding. Checked wiring harness , everything checked out , checked all speed sensors on tranny , all checked out , put a new ecm in the truck , still didn’t fix anything , I’m out of ideas and don’t know what the problem could be , any help would be appreciated !

 

Sounds like you might need to rebuild the tranny

 

Tranny was shifting just fine before it happened , the linkage is messed up was the only problem , the truck goes into gear just doesn’t move , no metal in the tranny pan either

 

Check engine light on?

 

Is this a 4X4? Something broke and doesn't have power to the drive shaft. The grinding is probably the park gear trying to engage at speed(still turning).