sounds like 3 - 4 gear are pretty grinded away. shifting with out the clutch in a standard car is not the best idea. unlike a diesel trans witch is made to shift without a clutch, a production car needs the clutch to disengage each gear before shifting. not doing that can easily wear out the teeth in a gear prematurly.I would do what fuse said and try to bleed the system first to see what happens. who knows, start with the small stuff first before waisting money on unneeded parts or mechanic labor time.