Ok ihave a 02 tahoe just hade my tran replaced 4l60e like a week ago.. Up untill saturday it has been running good now it over revs before shifting to the next gear (have to let go of the gas at around 4k so it shifts have only done it from 1-2 to 3rd afraid to go faster) only big thing i have done to it before doing this was changed my transfercase motor(had the serv 4wd light) which dint help i think i have a bad module bot sure if that can affect it please help and thanks in advance