Check the transfer case lubricant level Ford F150
Typical transfer case check/fill plug (A) and drain plug (B) are located on the rear of the transfer case
Note: Make sure the vehicle is on level ground for the check.
1. The lubricant level is checked by removing a plug from the side of the case. If the vehicle is raised to gain access to the plug, be sure to support it safely on jackstands — DO NOT crawl under the vehicle when it’s supported only by a jack!
2. With the engine and transfer case cold, remove the check/fill plug. If lubricant immediately starts leaking out, thread the plug back into the case — the level is correct. If it doesn’t, completely remove the plug and reach inside the hole with your finger. The level should be even with the bottom of the plug hole.
3. If more lubricant is needed, use a syringe or small pump to add it through the opening.
4. Thread the plug back into the case and tighten it securely. Drive the vehicle, then check for leaks around the plug.