700R4
There are 4 different options for the type of transmission that came in a 1988 K5 Blazer. They are the 4 speed SM465 manual, the 3 speed TH350 automatic, the 3 speed TH400 automatic and the 4 speed 700R4 automatic.
4L60-E
700 R4 if it is automatic. 2x2
700r4 if its an automatic
dextron III
Chrysler torqueflite 727, it is a 3 speed automatic transmission.
automatic transmission fluid,preforably a synthetic or synthetic blended fluid.
automatic transmission
You can use any kind of SAE certified automatic transmission fluid in your 1993 Nissan Pathfinder. You can check the automatic transmission fluid level with the transmission dipstick.
Dexron II. Transmission fluid
That would be a 4L60-E transmission.
Type F Automatic Transmission Fluid.