c6 makes positive shifts still but car revs up more to move. shifts
1-2-3 & reverse solidly but slips in all 4 gears was revvin on it
pretty good made a stop & upon restart transmission was slipping what
did i break? checked vacum lines & all other external adjustments any
help appriciated

jim warman

Line pressure might be a nice start... especially with rpm and pressure at
stall speed - all gears.... Fluid level and condition? Do you have engine
braking in manual one and manual two? When do your "low" throttle upshifts
occur?

I can't recall if I still have a band/clutch chart for this trans...