I don't believe that transmission has a dipstick, just a plug on the filler tube. You're going to have to improvise. I think if you google something like 62TE dipstick something should come up.
Yeah no dipstick, just a filler tube. I looked up the specs online and you have to fully warm up the transmission and stick something down the tube to measure. The dealers have a special tool. I just made one out of a PVC tube and marked it with a marker. I don't believe in filled for life transmissions.