OK, found the line bias valve. I guess i did not realize its function. I have rebuilt this trans using a combination of astg manual excerpts, online info that i found for the 4L60 and 4L60E, and the rebuild DVD.
From what i am understanding i need a stiffer spring that will not allow the valve to blow off the pressure on the forward gears, so it will allow for higher line rise.
I am seeing that some people are blocking off this valve? this sounds like a mod, should i consider this? If i were to replace the spring which one (color) should i use?
aside from this does my 10-15 psi boost at 1500rpm sound right? Just want to make sure that my TV setup is good.
Thanks again for your help on this.