Question about 1998 Chevrolet Astro

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98 chevy astro. rear differential is whining

How do i put oil in my rear differential? i took a look around it and couldn't figure it out. there is a 1/4 " hose on the top for what i dont know.

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  • Anonymous Mar 14, 2014

    rear differential



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On the drivers side of the differential, towards the front, there will be a 1" circle, with a sunk in square spot in the center. This is where you put oil in. Use a 3/8" drive socket wrench to unscrew it. (it fits right in the square sunk in spot) WATCH THE KNUCKLES! It hurts if you bang them, trying to loosen the plug. LOL When you get the plug off, stick your finger in the hole, and see if your finger comes out with any oil on it. The oil needs to be filled to the bottom of that hole. When the oil starts coming out of the hole, then you screw the plug back in, and you are done. IF, the rear diff has plenty of oil in it, then you may have another problem, like (inner/outer) bearings.

Posted on Jul 01, 2008


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