passenger side of the pumpkin. use a 3/8th ratchet to remove it.
It has no differential plug.
Assumeing you are at the rear of your van, if you crawl under the rear bumper you will see the rear axil, the center of that axil in the differential(round part)you should see a bolt or (plug) towards the top left side facing fprward the vehical this is where you can add differential fluid you want to fill it just below the leval of the hole.....
If doesn't have the rubber plug in the back cover it will have a threaded metal plug on the passenger side of the carrier housing near the pinion yoke. It takes a 3/8" square male drive to remove it.
Fill to refill plug, and up to 2 quarts. 75W-140 GL4 with 4oz slip additive.
Plug on the side of the differential. Location varies depending on the differential but should be easy to spot. If changing oil, you need to remove rear cover to drain (no drain plug), clean, seal and refill until oil begins to come out of the filler hole.
It's a stupid little plastic plug that can be stripped very easily. Take it to a rad shop and have them replace it.
The rear differential plug is located on the inside top part of the differential. Where the drive shaft connects.
Drive the vehicle for several dozen miles to warm the fluid up. Center a drain pan under the differential and remove the lowest of the two plugs. Allow the fluid to drain - remove the upper plug to allow it to drain freely. When the draining is complete, replace the lower plug and refill the differential with the proper fluid type until it just begins to run out of the upper hole. Replace the upper plug. You're done.
The fill plug is on the end of the differential. To access this, you will need to crawl underneath your car, and lok at the middle of the axle. There are two plugs on the differential; a drain and a fill plug. The Fill plug is obviously the plug closer to the roof of the car.
Unfortunately, those axles don't have a drain plug. So you're going to have to unbolt the differential cover and let it drain out that way. Note that you'll also have to clean off the old gasket and replace it when you reinstall the diff cover. To refill it, the plug is at the top of the differential carrier, on the right side.
Automatic trans drain plug is on left side of pan(for atf). differential oil drain plug is directly below differential. Manual transmission has only one plug(below differential in center of trans)
on the driver side on top of differential hub