My 2WD 99 Ram 1500 also has an NV 3500, not sure what lube was in there but it died. 4th gear was the only one working. It fills like it goes through the gears fine but only 4'th pulls. We we're just tooling down the road and poof acted like it went in neutral. any ideas out there? thanks for the help ahead of time

 

I will move this over to the 2nd Gen section for you. Hopefully they can help more