Oil leak
Check for oil leaks in and around the transfer case (oil seal, crankcase drain plug, etc.).
Oil level
1. Remove the plug (1) from the filler hole and remove the gasket. Check oil level (A) through the hole for the filler plug.
2. Place a new gasket on the filler plug. Screw the plug into the transfer case and tighten to the required torque.
Attention. Do not reuse the gasket.