Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Automatic Transmission Fluid Check
2003 Hyundai XG350 BaseSECTION Automatic Transmission Fluid Check
- Drive the vehicle until the fluid temperature rises to the normal temperature (70-80°C).
- Park the vehicle on a levelled surface.
- Move the selector lever through all positions to fill the torque converter and the hydraulic circuits with fluid, and then move the selector lever to the N position.
- After wiping off any dirt around the oil level gauge, remove the oil level gauge and check the condition of the fluid.NOTE: If the fluid smells as if it is burning, it means that the fluid has been contaminated by fine particles from the bushes and friction materials, A transmission overhaul may be necessary.
- Check that the fluid level is at the HOT mark on the oil level gauge. If the fluid level is lower is lower than this, pour in more fluid until the level reaches the HOT mark. Automatic transmission fluid: GENUINE HYUNDAI ATF SP-IIINOTE: If the fluid level is low, the oil pump will draw in air along with the fluid, which will cause bubbles to form inside the hydraulic circuit. This will in turn cause the hydraulic pressure to drop, which will result in late shifting and slipping of the clutches and brakes. If there is too much fluid, the gears can churn it up into foam and cause the same conditions that can occur with low fluid levels. In either case, air bubbles can cause overheating and oxidation of the fluid which can interfere with normal valve, clutch, and brake operation. Foaming can also result in fluid escaping from the transmission vent, in which case it may be mistaken for a leak.
- Insert the oil level gauge securely.
- The fluid and the oil filters should always be replaced when overhauling the transmission or after the vehicle has been driven under severe conditions. The replacement procedures are given below. Furthermore, the oil filters are special filters which are only to be used for the automatic transmission.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.