hi, i have a 93 gmc sierra 4x4 5.7L pickup, recently it felt like the tranny was slipping, i know its not because the tachometer stays steady when it feels like this, it seems like it is very slowly shifting from drive to over drive . when this happens i shift into drive an all is well again.
when i'm slowing down to almost a stop or driving slow in bumber to bumber traffic sometimes it will bang into a lower gear and actually stop the vehicle. scary!!
could the first problem be the torque converter? how bout the second?
Hope someone can help ThankTony