I have a 94 Camry LE 2.2. A few days ago while driving my camry, I noticed a couple different times it hesitated when I started to take off from a stop. The next day, I started the car and shifted it in to reverse and it wouldn't go anywhere, same with drive and the rest of the gears. Car's RPM's will spike when pushing the gas, it just wouldn't go into gear. I let the car set for about a week and decided to try again. Same problem EXCEPT I noticed if I jiggled the shifter while it was in reverse or drive, it would eventually take off. This worked for a couple days, and now it's back to not shifting into gear at all again....

 

I wonder of the gear selector needs adjustment.
I hope it is not an actual tranny issue. How many miles on the car?