4R70W Trans codes
4R70W Trans codes
Does anyone know how or what you need to pull codes from this transmission? I am having a problem with a hard 1-2 shift upon slow acceleration only. It bangs from first to second. I changed out the 1-2 accumulator spring, but it still does it, been doing it for about 15k miles now, just getting annoying now.
Thanks,
Rich
Thanks,
Rich






