Transmission - Rearend
hi i have a 96 chevy 15004wd ext cab sb with vortec 305/4l60e 188k miles, and heres the problem, when the truck is completely cold(colder outside the longer) the tranny up and dowshifts 100% beautifuly no slipping nothing its perfect for maybe 10-15 miles, then once its warmed up it completely...