Line pressure should only be increased at the shift point. If you increase line pressure at all times you will eventually destroy the transmission. As for the shifts, I have the mild J-mod and with 3.73 the tires do chirp even at 3500 rpm. I have never felt the 300+ jmod so I could not tell you what it feels like. In rainy weather I have to ***** foot the car, sinc first gear is absolutely useless and even when the 1-2 shift comes at low rpms it tends to kick the rear end out a bit.
1997 Birdie, its the good one. Limited Edition Sport Sold
9/6/03-9/7/03-J mod & Mark VIII TC 12/26/03-
Apten Chip & 03 GT MAF 3/11/04-3/14/04-PI Cams & PI Intake 8/19/04-FRPP 3.73 Diffy2/26/05-SCT chip (burned by Ken B.)
1998 Z28 M6 5.7 LS1