To find it, you'll need to:
1. Identify your transfer case: Look for a tag or casting number on the transfer case itself. This number will help you find a diagram or manual specific to your transfer case.
2. Consult a repair manual: A repair manual for your specific year and model Dodge Dakota will show you the exact location of the fill and drain plugs for your transfer case. This is the most reliable method. You can find these manuals online (often in PDF form) or at auto parts stores.
3. Look closely at the transfer case: The fill plug is usually a bolt or similar fastener located on the side or top of the transfer case. It's often near the drain plug, but not always directly adjacent. It may be slightly recessed. Look for a slightly different shaped or sized plug than others nearby, as it might be a slightly larger hex head or have a different shape.
Caution: Incorrectly adding fluid to the transfer case can cause damage. If you are unsure, consult a mechanic.
