On vehicles with a manual transmission, worn shift bushings can cause the transmission to pop out of gear, especially when coasting down in 1st or 2nd gear. Replacing all the shift linkage bushings is pretty straight forward and not expensive and will commonly correct this concern.Google+
Car Problem Reports
Toyota Camry Worn Shift Bushings Will Cause Manual Transmission to Pop Out of Gear
Toyota Camry Problem
Drive Train Affected: Manual Transmission
Average Mileage: 219,500 mi (199,000 mi - 240,000 mi)
Visitor, 1995 Toyota Camry, Manual Transmission, 199,000 mi
My manual transmission pops out of fifth gear.