1989 Acura integra 1.6 3-door

Driving down the highway and lost 5th gr.Have reverse through 4th though.No crunching sounds in tranny when it went out.Rpm's just shot up and then no power. Someone told me it was the clutch,a mechanic told me that if it were the clutch, the other gears wouldn't engage.Also was told that the bar that goes into the trans. could be bent and may not be engaging into 5th. My last resort would be dropping the tranny and checking the gear out.

hopefully someone out there has had this happen and knows the solution to my prob.