Manual Transmission - Oil Level Check, Oil Change
Check the transmission for oil leaks.
Check the transmission oil level by removing the filler plug. If the oil is contaminated, drain the oil and fill with new oil.
1. Remove the filler plug and check the oil level with your finger.
2. The oil level should be at the lower edge of the filler hole (filler plug hole).
If the oil level is below the specified level, add oil until it begins to flow out of the filler hole, then install the filler plug.
3. Replace the transmission oil if it is noticeably contaminated or does not have the correct viscosity.
TRANSMISSION OIL REPLACEMENT
Recommended transmission oil:
Hypoid gear oil (HP Gear Oil), API GL-4, SAE 75W-90 viscosity.
1. With the vehicle on a level, horizontal surface, remove the drain plug and drain the oil from the transmission.

2. Install a new gasket and reinstall the drain plug.
Tightening torque Drain plug: 30 - 35 N·m

3. Remove the filler plug and fill with new oil to 5 - 9 mm below the lower edge of the filler hole (filler plug hole).
Transmission oil capacity:
2.15 liters Tightening torque Filler plug: 30 - 35 N·m
Test yourself
A quick Hyundai Elantra CN7 quiz: every answer comes with an explanation and a link to the manual page.