I drained the fluid from my transmission while I had it out of the car replacing ims, and rms. The fluid that came out was red in color. Makes me think it was redline. I replaced it with porsche gear oil I bought from Pelican. Now the transmission (5 speed) is difficult to shift when cold and will grind a bit if forced.

Brake, and clutch fluid all replaced, and flushed alongside new slave cylinder.

Should I try to switch to a different fluid? Boxster has 90k on it.