If your 90 stanza squeels when it shifts between first and second gear it is an AT is it the transmission?

Yes, if your 90's Squeel occurs specifically when shifting between first and second gear, it could indicate an issue with the automatic transmission. Common causes for this noise may include low Transmission Fluid, worn components, or issues with the torque converter. It's advisable to have a qualified mechanic inspect the transmission to diagnose the exact cause and determine if repairs are necessary.