Browse

Antiques Collectibles Apparel Baby Kids Items Books， Movies And Music Electronics Free Stuff Garden Outdoor Health Beauty Home Goods Home Improvement Supplies Musical Instruments Office Supplies Pet Supplies Sporting Goods Ticket Toys Games Transportation Others

Used Cars New Cars Others

Business Crafts Design And Web Events Home Improvement Legal Lessons Personal Pets Photography Repair And Technical Support Wellness Writing， Translation， And Transcription Others

Activities & Groups Artists & Musicians Classes & Lessons Events Friendship & Networking Lost & Found Rideshare Sports Teams Volunteers Travel & Travel Partners Skills & Language Swap Other

Is It Normal for Oil to Leak from the Transmission Vent?

2 Answers

EverettRose

07/24/25 1:47pm

Oil leakage from the transmission vent is a normal phenomenon. Here are the specific details about oil leakage from the transmission vent: 1. Cause: The main reasons for oil leakage from the transmission vent are damaged seals or pipeline breakage. Pipeline breakage causes oil to leak from the damaged area during circulation; at the connection between the transmission and the engine, damaged seals or loose fastening bolts can widen the connection gap, reducing sealing effectiveness and allowing oil to leak from the gap. If the root cause is not addressed promptly, the leakage issue will persist. 2. Impact: Oil leakage from the transmission vent can lead to insufficient lubrication, accelerating friction between gears. Oil also serves to cool and remove impurities within the transmission. Prolonged lack of lubrication can result in transmission failure.

Was this review help?

13

2

Share

FelicityAnn

08/11/25 7:43am

The issue of oil leaking from the transmission vent hole depends on the situation. Last year when I was driving on mountain roads, I encountered the same thing. On a hot day, after continuously climbing for two hours, the transmission oil temperature soared to over 90 degrees. At that time, I noticed the vent hole was a bit damp. My mechanic buddy said this is normal—the transmission needs this small hole to vent due to thermal expansion and contraction, and a bit of oil mist is fine. But if it keeps dripping or even forms a steady stream, then you need to pay attention. It’s likely either overfilled oil or a clogged vent valve. As an experienced driver, I suggest you wipe it clean first and observe for a few days. If oil stains appear on your parking spot, get the oil level and transmission seals checked immediately.

Was this review help?

12

2

Share

Expand All

More Forum Discussions

Is it mandatory to use 95-octane gasoline for the Magotan?

The Magotan must use 95-octane gasoline. The Magotan is equipped with turbocharged engines across its lineup, and the manufacturer requires a minimum of 95-octane fuel to prevent premature engine carbon buildup and knocking. In terms of exterior design, the Magotan features Volkswagen's signature front grille, sharp split headlights on both sides, and black trim around the lower air intake. Power options include a 1.4T and a 2.0T turbocharged engine, with the 2.0T available in high and low-power versions. The 1.4T turbocharged engine delivers a maximum power of 150 horsepower and a peak torque of 250 Nm, while the 2.0T turbocharged engine offers maximum power outputs of 186 horsepower and 220 horsepower, with peak torques of 320 Nm and 350 Nm, respectively. The transmission system comes standard with a 7-speed dual-clutch gearbox.

Does a newly installed battery need to be charged?

Newly installed batteries do not require charging. If going out or not in use for an extended period, charge it once a month. The charging time should be controlled at around 8 hours. Stop charging 1-2 hours after the charger indicator light turns from red to green, completing the charging process. After using the battery for half a year, discharge it once every month, then recharge the electric vehicle battery, controlling the time within 12 hours. When the battery's power significantly decreases or the electric vehicle charger does not switch lights during charging, distilled water needs to be added to the battery. Batteries should be inspected regularly. During use, if the electric bicycle's range suddenly drops by more than ten kilometers in a short time, it may indicate that at least one battery in the battery pack has issues such as broken grids, softened plates, or shedding of active material from the plates, leading to short-circuit phenomena.

Why is the Teana called Altima?

The English name of Teana is Altima, and this car is known as Teana in China. The Teana has a length, width, and height of 4910mm, 150mm, and 1447mm respectively, with a wheelbase of 2825mm. The front grille of the Teana adopts a trapezoidal design, which is quite large, and a chrome strip surrounds the grille area, connecting the headlights on both sides. The Teana is equipped with two engines, a 2.0L and a 2.0T, both paired with a CVT continuously variable transmission. The 2.0L engine has a maximum output power of 117 kW, a maximum torque of 208 Nm, and a top speed of 200 km/h. The 2.0T engine has a maximum output power of 185 kW, a maximum torque of 380 Nm, and a top speed of 210 km/h.

How to Use the Air Conditioning in a Car?

Steps to use the air conditioning in a car: 1. Open the car doors and windows; 2. Use the fan for ventilation, wait two to three minutes for the hot air to dissipate before entering and starting the car; 3. Do not rush to close the windows, first turn on the external air circulation; 4. When the temperature inside and outside the car is similar, close the windows and switch to internal air circulation. After a car has been exposed to the sun in summer, do not immediately turn on the air conditioning upon entering. Instead, open all four doors first and allow natural ventilation for 5 minutes before turning on the air conditioning. Using the air conditioning during low-speed driving, especially when encountering traffic congestion, causes the engine to run at artificially higher speeds, which can reduce the lifespan of both the engine and the air conditioning compressor. Prolonged use of the air conditioning can lead to excessive pressure on the condenser, causing wear and tear on the cooling system.

What are the body dimensions of the Highlander?

Taking the 2022 Highlander as an example, its body length is 4965mm, width is 1930mm, height is 1750mm, and wheelbase is 2850mm. The relevant introduction of the Highlander is as follows: Introduction to the 2022 Highlander: The Highlander is an automobile brand under Toyota. The 2022 Highlander has a maximum fuel tank capacity of 65L. It comes standard with ABS anti-lock braking system, tire pressure monitoring, automatic parking, multifunction steering wheel, knee airbags, in-cabin PM2.5 filter, and other configurations, making it generally well-balanced. Introduction to the 2022 Highlander's powertrain: It is equipped with a 2.5L naturally aspirated engine, delivering a maximum horsepower of 192Ps, maximum power of 141kW, and maximum torque of 238N·m, paired with an E-CVT continuously variable transmission. Additionally, it features an electric motor with a maximum horsepower of 237Ps and maximum power of 174kW.

What does 2055516 tire represent?

2055516 tire represents the tire model, with the standard notation being 205/55R16. These numbers and letters indicate the following: 205 refers to the tire width of 205 millimeters, 55 is the aspect ratio meaning the sidewall height is 55% of the tire width, R stands for radial tire, and 16 indicates it fits a 16-inch diameter wheel rim. Tires are the only components of a vehicle that make contact with the ground, directly affecting driving stability and safety. The tire specifications are printed on the sidewall, which contains crucial information such as tread pattern, size specifications, recommended tire pressure, manufacturing date, speed rating, and load index.

Trending Ranking

Why is there high-pressure gas inside the cooling system?

What Causes the BMW to Display an Engine Overheating Warning?

What is the process for renewing a driver's license in Fuzhou?

How Long is a Driver's License Valid After Expiration?

Common Engine Faults?

What does the autohold function mean in Volkswagen cars?

How to Check Tire Pressure on the New Sagitar?

What happens if you drive without inserting the dipstick?

What Causes the Abnormal Noise When Shifting Gears in the Transmission?

How to Check the Production Date of New Car Glass?

More Forum Discussions

What are the four-character car brands?

What should be paid attention to when performing the first maintenance on a vehicle?

What causes a Jetta to have trouble accelerating?

What to Do If the Car Low Beam Adjustment Screw Is Broken?

Help

Cookie

Cookie Settings

© 2025 Servanan International Pte. Ltd.