1. Engine on and warm (preferably after a few mins driving).
2. Tranny in Neutral.
3. Check dipstick. Fluid level must reach H (hot).
Same problem din sa Lancer ko. Mas malala yun kasi bumibitaw ang tranny when cornering, braking and climbing. Basta di level ang oto nagrereklamo sya. Had my mechanic refill the ATF to the correct level and ok uli.