I just did a rebuild on trans on my Z28 (94) and also put a near stock lockup converter in it as my high stall converter clutch gave out.

The car is much tighter now, and I notice a very harsh 1-2 shift. I am wondering how much you guys generally step down pressure (-5 -10 -50).

I will have a gauge on it while doing this to verify the minimum line pressure is met while 1-2 happens. I don't want to beat the crap out of my new sunshell and hard parts; and chirp tires while trying to pull off from a stop light.

Hope to get some insight from someone, thanks! I will likely try taking 10% out first and see what i get. Just don't want to decrease pressure and hopefully even with the shift kit it's possible to decrease firmness without burning up clutches.