Question.. This original thread started by adding friction modifier to existing fluid. Would it be better to add the modifier to my stock fluid or drain it out and replace it with the pennzoil synchromesh?
Just remove the drain plug on the side of the trans to drain it correct? Then fill from where the shifter is until it tops off?
personally, i would change the fluid out to syncromesh. earlier in the thread someone pointed out that tremec now recommends this fluid for T56's. if that doesn't solve your problem, then try switching back to stock fluid w/ friction modifier.
yesterday i installed steeda's clutch adjuster kit that includes a new cable, firewall adjuster, and clutch quadrant. this solved my problem completely. no more brick wall in any gear, even at higher RPM's. proper clutch adjustment might be something to look into if you haven't already. good luck