Patent ID: 8434595

Claim:
A valve body cover of an automatic transmission, comprising: a cover plate having a hole; an oil level plug having a cap detachably mounted onto the cover plate from the outside of the cover plate and an insertion extended from the cap and selectively inserted into the hole of the cover plate; rotational pressing members formed in the insertion of the oil level plug and the cover plate respectively to press the cap against the cover plate while the insertion of the oil level plug inserted in the hole is rotated relatively with respect to the cover plate; and a sealing member which is disposed between the cap and the cover plate and compressed by the cap for sealing a gap formed between the cap and the cover plate while the cap is rotatably coupled to the cover plate; wherein the cover plate includes a receiving groove formed along the hole of the cover place to retain the sealing member therein; and wherein a locking protrusion is formed on an inner circumference of the receiving groove to couple the sealing member in the receiving groove.