
Transfer case oil is also called differential gear oil. The working principle of the transfer case is: after the engine's power passes through the transmission, it is directly connected to the rear axle via the drive shaft. The transfer case extends another output from the transmission and transmits power to the front axle's output shaft through a silent chain. Its characteristics include: 1. Improving the vehicle's off-road capability; 2. High reliability; 3. Switching to two-wheel drive mode on smooth roads can reduce consumption. The transfer case is a device that distributes the engine's power, delivering it to the rear axle or simultaneously to both front and rear axles. The effects of not changing transfer case oil for a long time include: 1. Accelerated wear of gears inside the transfer case; 2. Damage to the transfer case; 3. Reduced lubrication performance, with many metal particles present in the oil.

Transfer case oil is commonly referred to as transfer case lubricant or transfer case fluid in the automotive community. I’ve been driving a 4WD SUV for many years and have always called it that. This fluid is primarily used in the transfer case component, which is the core part of a four-wheel-drive system, responsible for distributing engine power to the front and rear wheels. Its main function is to lubricate gears and bearings, preventing excessive wear and noise. If you drive an off-road vehicle or an all-terrain vehicle, this fluid is especially important because rough road conditions can easily contaminate it. I personally experienced issues due to neglecting an oil change—there was loud noise during startup, which was resolved only after replacing the fluid. Remember to inspect and replace it every 50,000 kilometers or as recommended in the manual, and avoid using the wrong grade, such as GL-5, which could damage the system. Keeping the fluid fresh over the years can extend its lifespan and save on repair costs.

The transfer case oil, also known as transfer case lubricant or transfer case fluid, was something I had to research extensively when I first encountered it as a young, novice driver. This oil is used inside the transfer case to primarily lubricate the gears and drivetrain components, ensuring even power distribution in four-wheel-drive vehicles. Starting from the basics, the owner's manual always emphasizes its importance. My first car was a family SUV, and my dad often reminded me to change the oil regularly, otherwise, strange noises or acceleration issues might occur. Beginners should remember its variants like transfer case fluid and not overlook this item during maintenance. The manufacturer recommends changing it every 40,000 kilometers—a simple operation that can prevent major problems. Learning these details during the novice stage can enhance maintenance awareness.

The transfer case oil, also known as transfer case lubricant, is something my husband always mentions during our family car maintenance. It is used in the transfer case to lubricate the gears, ensuring smoother and quieter operation of the four-wheel-drive system. Neglecting to change the oil can accelerate component wear, leading to costly repairs. Based on my daily experience, I recommend selecting the oil according to the season, such as using a low-temperature variant in cold regions to prevent freezing and ensure driving safety.


