Not a GN, but over at the corvette forum board, you guys are acknowledged as the 2004r masters...I have a 77 Vette that I installed a 2004r from Monster Transmission in. Stage 2 rebuild, stock L48, a cruiser, not a race car. Install went fine, and pressures were good. The only issue I have is that, at part throttle, it shifts late, over 2500 rpm, and slams into 2nd gear, hard enough to snap your head back. 3rd and 4th are fine. I've been told a Sonnax governor would fix it, or a CK Performance valve body. What would you guys suggest?