Can 85w140 Gear Oil Be Used in a Transmission?

2 Answers
LaPaislee
09/06/25 3:33am
85w140 gear oil can be used in transmissions. 85w140 gear oil is a multi-grade viscosity, all-weather type with a wide operating temperature range, making it suitable for year-round use. In 85w140 gear oil, the 'w' stands for winter-grade gear oil, '85' indicates the low-temperature viscosity—the smaller the number, the lower the viscosity, resulting in better low-temperature fluidity and performance. '140' represents the high-temperature viscosity—the larger the number, the higher the viscosity and temperature resistance. Gear oil is primarily composed of petroleum-based lubricating oil or synthetic lubricating oil, blended with extreme pressure anti-wear agents and oiliness agents. It serves to lubricate gears and bearings, prevent wear and rust, and assist in heat dissipation for gears. It is used in various gear transmission devices to extend their service life and improve power transmission efficiency.
Was this review help?
9
3
Share
Damien
09/18/25 3:33am
The viscosity grade 85W140 is quite high. The number before the W represents low-temperature fluidity, and the number after it indicates high-temperature viscosity. For ordinary family cars, it's recommended to use medium-viscosity oils like 75W90 or 80W90 in the transmission. 85W140 is too thick. During cold starts in winter, the oil won't flow properly, leading to insufficient lubrication of transmission gears and accelerated wear. Automatic transmissions require extra caution, as ATF (Automatic Transmission Fluid) demands specific friction coefficients. Using excessively high-viscosity oil can cause clutch plates to slip and significantly increase shift shock. I once saw someone use this oil in a manual transmission car, and it became difficult to engage first and second gears, with fuel consumption rising by 10%. It's advisable to check the recommended grade in the owner's manual rather than experimenting arbitrarily.
Was this review help?
13
1
Share
Expand All
More Forum Discussions

Does the Tire Pressure Monitoring System Need to Be Reinstalled When Changing Tires?

Replacing two tires does not require resetting the tire pressure monitoring system. Only when swapping the front and rear tires is it necessary to reset the tire pressure monitoring system. Reason for resetting: After tire rotation, the tire pressure monitoring system must be reset, also known as "tire pressure learning." Each tire is equipped with a pressure sensor that transmits tire pressure data wirelessly to the car's tire pressure control system, allowing the vehicle's data display to show the pressure of each specific tire location. For example, if the left front tire is moved to the right rear position without resetting the system, the car will still recognize it as the left front tire rather than the right rear tire. Reset method: After parking and turning off the engine, engage the handbrake. Power on the car but do not start the engine. Simultaneously press and hold the lock and unlock buttons on the remote for 5 seconds until you hear two short honks (not too loud). Then, follow the sequence of left front, right front, right rear, and left rear to reset each tire. Start with the left front tire: Remove the valve cap and continuously deflate (or inflate) the tire until you hear a short honk, indicating the tire is set. Deflation may take 10 to 20 seconds. If no honk is heard, continue deflating. Repeat the same method and sequence for the remaining three tires. After the last tire is set, the car will immediately emit two short honks.
18
5
Share

Are the questions in the subject one exam the same as those in the mock exam?

The questions in the subject one exam are basically the same as those in the mobile mock exam, with possibly slight differences. You need to answer the questions on a computer, and the computer equipment in each examination center may vary. The number and types of questions are the same. Below is relevant information: Introduction: Subject one, also known as the theoretical exam for drivers, is part of the assessment for obtaining a motor vehicle driver's license. Exam content: According to the "Regulations on the Application and Use of Motor Vehicle Driver's Licenses," the exam includes driving theory basics, road safety laws and regulations, local regulations, and other related knowledge. The exam is conducted on a computer, with 100 questions, and a score of 90 or above is required to pass.
19
5
Share

Can the window be rolled down during the Subject 2 driving test?

Subject 2 driving test allows the window to be rolled down. Below is relevant information about Subject 2: Introduction: Subject 2, also known as the small road test, is part of the motor vehicle driver's license assessment and is the abbreviation for the field driving skills test. Test Content: The C1 license test includes five mandatory items: reversing into a garage, parallel parking, stopping and starting on a slope, right-angle turns, and curve driving (commonly known as S-turns). Some regions may include a sixth item, such as high-speed toll card collection. The C2 license test includes four mandatory items: reversing into a garage, parallel parking, right-angle turns, and curve driving (commonly known as S-turns).
8
5
Share

What is the reason for no sound when connected to CarPlay navigation?

The specific reasons for no sound when connected to CarPlay navigation are as follows: Check if the phone is in silent mode. Reconnect CarPlay. Check if the car volume is at maximum. Additional information: Reconnecting CarPlay: If electronic devices experience some malfunctions, it's well known that restarting or reconnecting is the best and most effective solution. You might want to try reconnecting CarPlay, then check if the phone has notification sounds again. Checking if the car volume is at maximum: The car has its own separate volume control. If there's an incorrect operation that accidentally mutes the car's volume, it will result in no notification sounds from the phone when connected to CarPlay. Adjusting the volume to maximum might solve this problem.
17
2
Share

Can carlife play videos?

carlife cannot play videos. CarLife can be well adapted on the vehicle terminal, whether it is Linux, QNX or Android. The following is a detailed introduction about the automotive module: Automotive engine control module: The automotive engine control module is the core component of engine control. According to the input information of each sensor, it controls the fuel injection and ignition timing of the engine, and provides the best control instructions for other output devices. Automotive ignition module: The automotive ignition module, also known as the ignition controller, can choose the combination of metal probe or ultraviolet photosensitive tube according to different environmental requirements, so as to realize automatic ignition, flame indication, flameout alarm and signal transmission.
1
0
Share

Is rust inside the car wheel hub a serious issue?

It's not a serious issue. For most vehicles, the components securing the brake discs and the entire wheel assembly are made of iron. Here is some relevant information: Introduction: The wheel hub, known in English as Wheel Hub or Wheel Hub Unit, is the cylindrical metal component inside a car tire that supports the tire centered around the axle. Simply put, it is the part at the center of the wheel where the axle is mounted, serving as a crucial component connecting the brake drum (or brake disc), wheel disc, and axle. Tire: The so-called 'tire' refers to the rubber part of the 'wheel.' Being a flexible body, the inner contour of the tire is supported by a barrel-shaped component at the center mounted on the axle, which is called the wheel hub. Due to different language habits, many people have various names for the wheel hub, such as 'rim.' In southern regions, many people refer to it as 'tire bell' or 'car bell.'
13
5
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.