Quick 6 / 6R80 hard 1-2 shift
By Ihavea73
73 with a BluePrint 306, FiTech Go Street, 6R80 and a US Shift Quick 6. The 1-2 bangs in and shifts late at normal light throttle. 2-1 coasting down is a little harsh too. 2-3 and up are fine. If I barely feather it from a stop it shifts smooth, but normal driving it slams into 2nd. A TPS recal fixes it for a while, then it comes back. The trans TPS is the US Shift cable-pull sensor on its own bracket and the cable has some slack in it (pic attached). Also the FiTech handheld only shows... Read more


