5th gear has bit the dust in my 24 Valve 5.9 Turbo 3500 Dually. I have the NV4500 5 Speed Tranny and I've been told it could just be a lock nut backed off or I'll need a replacement gear. I'm looking for some advise from someone who has tackled this job before. I am mechanically inclined but not a mechanic. Is this a do it yourself-er? If doable any helpful info before hand would be greatly appreciated!

 

Just wanted to say THANKS FOR ALL THE HELP ON THIS ISSUE I HAD! Yeah....