I am having a noticeable shift stagger between first and second gear. It happens from a stop under full throttle, it shifts to second then seems to stubble, like it wants to down shift again, then continues normally. Anyone else experience this? Could it be my boost-by-pass valve dumping boost or what? My mods are a Diablo chip, Mac cat back, Anderson power pipe, 6# lower pulley, and NGK Tr6 plugs. Thanks for any help.

 

I have the same thing going on too, Sal at PSP said it's the torque converter unlocking but I never noticed it when my truck was unchipped. it seems to happen most on the downshift