My unscientific review of three 355 transmission fluids

I bought my car four years ago just after a major. Not sure what kind of manual transmission fluid was in it. Drove for a while with it and kept reading here about Redline NS and drained and filled with it. Last year I decided that the enemy of good was better, so I drained and filled with Royal Purple. This spring I drained and filled with Redline lightweight shockproof. Here are my observations.

Redline NS: huge improvement over whatever was in it. Minimal pre-warm up residual grinding of gears in second and third. Very soft feel once moderately warmed up and to full temp.

Royal Purple: Worse than whatever it had after major. Required the 5-7 minute idle from cold to not "grind" second and third. Once warmed up was fine. We are talking full temp being necessary though.

Redline LW shockproof: best cold performance. Can just take off when cold and not feel second and third. Feels the most heavy or "thick" even when warm, but who cares really.