Hey everyone.  i just bought a 76 CJ7, and it had been parked in a barn for a little over a year until last week.  after a little adjusting on the carb., the engine is running great.  The problem that is has is shifting into 3rd gear.  When going into third, it "grinds" just enough to notice it, but not bad.  It is a little tough to shift into all of the other gears, but no grinding.  When you are driving, it is making a slight "whining" noise as well.  Any suggestions?  Clutch, incorrect fluid, take it to the shop?

Thanks for your help.