If it has overdrive, then it is the 4L60 which is almost identical to the earlier 700R4. If it does not have overdrive, then you most likely have the Turbo 400 3 speed automatic.
700r4 if its an automatic
Th-700 r4
4L60E / 4L65E Transmission.
Should be a 700R transmission.
That would be the 4L60E transmission
That would be the 4L60E transmission.
That would be the 4L60E transmission.
That would be a 4L60E transmission
4L60E / 4L65E transmission.
Dexron 3
700R4
That would be the 4L80E transmission.