I've been running DOT 3 but I heard you have to use DOT 5 with Cartek and I Was curious if I'm using the right stuff. Yesterday I started having problems with my trans. Wouldn't go into any gear until I slowed down drastically and at a stop it grinds rear bad when going into first or even second and also when I let the clutch out just to where it starts engaging? A local trans guy suggested it was a clutch problem and I looked at my fluid yesterday and it was filthy. So I'm going ot try and change out my fluid and rebleed the system and wanted to make sure IM putting the right stuff back in