Where do you put the transmission fluid on a manual 1990 Nissan 300zx?
The transmission fluid for the 1990 Nissan 300ZX manual transmission is added through the transmission oil filler plug. This plug is located on the top side of the transmission casing. It is usually marked with a cap or a plug that has the word "OIL" or "TRANS" on it. Remove the plug and pour the transmission fluid in until it starts overflowing from the filler hole. Replace the plug and you are done.