I would be pretty certain that is the turbo mate, if it's losing a lot of oil on boost and has signs of oil in parts of the turbo that it shouldn't, then i would definitely get it off and have it checked before it does any major damage.
Yes its the same as mine mate you think its in and when you lift the clutch up it makes a grinding noise, you just need to have a play getting it into reverse and when your completely sure its in gear, release the clutch
That's the exact one i'm thinking about mate Does that exhaust run under or over the rear axle, because i'm having issues with my current one banging on the axle? My current one runs over the beam