Are you using the correct Dexron fluid? You know the trans fluid creates a "whipping" effect and can cause the jerk your describing. Have you taken a peep at your transmission mounts? I would try to eliminate the easy parts before digging through a transmission.
2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille
Last edited by 5t3alth; 04-25-2014 at 06:10 AM.