[Blue70SS]

Originally Posted by Rick@RKT56

I use GM manual trans fluid 88861800 in my personal Vette. I think the issue with g$rinding is due to the sintered bronze friction cones that are "grabby" and either on or off type of engagement (similar to manual clutch with similar friction material). The carbon blockers "slip" and have a softer engagement. I have heard through channels that 2011 Vette TR6060 have carbon blockers on all gears but my Tremec supplier told me it's only the 2nd gear blocker. Short of me getting my hands on one, I'll have to wait and see.

Just ordered an RPM Level 6 transmission. Not that Chevrolet needs to do micropolishing and such, but maybe there's something to be learned. They're doing a billet output shaft and actually installing a rear bearing. My output shaft hasn't broken yet, but I'm right in the # range and didn't want to get stranded several states away having to take off work an extra week and end up ruining a vacation. Besides mine wouldn't be covered due to mods I'm sure - but have had the touchy shifting before the mods. Royal Purple did make it better and that's the fluid RPM says to use. Must be something behind it! It would be interesting if just adding the additional bearing could have solved most of the problems (even though heat treating was an issue). Good to see customer service taking interest in this thread.