Kurzhaar

23 hours ago, fjh said:

Tech  BE NICE now 😂 ! 

If it is a mack trans it sounds like it is You could have ! A loose trans yoke bolt check that first ! if its tight the trans lid has to come off to check to see that the shift rail bolt has not come loose!  Not a field fix! Chances are the range pack is worn  now eitherway the trans needs the back section off it and repaired and unless you got tools for the job you can't do it inframe Trans has to come out!😒 Wild can take over from here. Poke poke jab😀  don’t worry buddy your not alone!

It is an Eaton Fuller 9 speed.

Last night when returning to the field I flipped the switch to go to look range to downshift and got a grinding noise.  Now the truck shifts into gear but the driveshaft does not turn. 

How can we diagnose this in the field?