Wondering if someone can help me figure out what just happened to my 5th gear.  I have a 5 speed manual transmission.  Everything was shifting beautifully until this evening while driving home in 5th gear at about 60-65 mph.  I accelerated and just got a rapid engine rev with no gear.  I slowed and shifted into 4th.  The rest of the way home 1st - 4th gears were fine.  I tried 5th once again and it just wasn't there.  I have searched high and low but haven't found this problem addressed.  Any insights into what happened and where to get any parts I might need would be greatly appreciated.  I have a Series III that I work on with no major snags but I just got this D90 recently and I am not so sure. Please help if you can.
							
						
					