Classic symptoms of low fluid level. MAKE SURE you check the fluid level in your transmission with the transmission HOT, vehicle parked on a level surface, AND the gear selector in NEUTRAL. This is very important that you check the level in NEUTRAL. If you refill and check the level in "P" the transmission will read full but as soon as you move your gear selector away from "P", the level will drop considerably. When the level drops the fluid will slosh around in the pan and will cause the pump to suck air when turning.