Is transfer case fluid and transmission fluid the same

Transfer cases may be filled with gear oil, automatic transmission fluid (ATF), or specialty lubricants. It is important to regularly inspect the transfer case for any damage, leaks, or other concerns.

No. A transmission is used primarily to multiply engine torque at lower vehicle speeds, as well as provide a reverse gear. A transfer case is usually but not always attached directly to the transmission's output, and is used to supply torque to both front and rear drive axles.

Gear oil is a lubricant for manual transmission while transmission fluid is a lubricant for the automatic transmission of semi-trucks and other heavy and light-duty vehicles. In essence, they perform the same functions. However, they differ in chemical composition.