hey guys, i have a 98 2500 Z71 that is having some issues. it started a few months ago when i was helping a buddy move. at first the tranny would shift outta od all on its own. this lasted a couple months. then while i was headed home with my buddies stuff i lost all gears. the sound that came from the drivetrain was a sound like it got put in park while the truck was still moving. like i said i lost all gears and it has got me puzzled. any ideas thoughts or comments would be great. my tranny is 4L80E with a np 241c t-case.
The ratcheting sound you are describing means something broke inside the transmission. Probably a gear. Sounds like you are going to need to have it removed, taken apart and repaired. You drop the pan and will probably see metal chunks.