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I'm doing a fluid change on my rear diff' (V8-RWD). I was following one of the excellent guides from this forum. I wasn't sure if I had identified the fill plug correctly, since even with the LHS wheel removed it's a little difficult to see in there. I pulled up the service manual, just to be sure I was looking in the right place, and they have it located on the top:
So now I am confused, as everything else suggests it should be about 1/3 of the way up the LHS cover. Am I over thinking this and the drawing just shows an additional fill plug, that they use during manufacturing?
On the mechanical LSD version the plug is just to the right of where #5 is pointing in the diagram from post #1. That's where I'd expect it to be on the e-diff version too, but I don't have a PDF of that. A quick check of an online parts catalog shows a replacement plug hovering around that location but the diagram doesn't show it in place.
On the mechanical LSD version the plug is just to the right of where #5 is pointing in the diagram from post #1. That's where I'd expect it to be on the e-diff version too, but I don't have a PDF of that. A quick check of an online parts catalog shows a replacement plug hovering around that location but the diagram doesn't show it in place.
Yes, that's what I've got and it matches the reality in the driveway. I do expect the e-diff filler plug to be very close to that location but don't have an example handy.
Yes, that's what I've got and it matches the reality in the driveway. I do expect the e-diff filler plug to be very close to that location but don't have an example handy.
For the benefit of base model owners who might have run across this topic as a result of a SEARCH:
The fill plug on the base car is in the same position (yellow high-lighted #6) on open-diff cars, too. As stated, visual access is not straightforward. The 'angle of the dangle' is important. For sure, it is an aperture view. Have I emphasized that enough?
I made a few vain attempts to unscrew NOTHING in that little circular embossed 'hole' to the left of #6 at first...
OK cool, thanks. Interestingly, the drawing above of the mechanical diff' seems to show the same top mounted fill/level plug. So perhaps it is fitted to all models? I can't image how anyone would get to it, without dropping the diff. I did locate the side plug. It just takes some serious contortion to get in close enough to see it.
OK cool, thanks. Interestingly, the drawing above of the mechanical diff' seems to show the same top mounted fill/level plug. So perhaps it is fitted to all models? I can't image how anyone would get to it, without dropping the diff. I did locate the side plug. It just takes some serious contortion to get in close enough to see it.
Did you look at my DIY? I show exactly how to get to it and which tools.
Did you look at my DIY? I show exactly how to get to it and which tools.
I looked at it and found it helpful, modified for tools I had on hand. I used a 3/8" drive short hex bit and some combination of extensions. I think I used a wobbly one but can't remember with certainty, but probably ended up with about 12" so I had a good swing on the ratchet handle. A flex-head ratchet helped. I used a variation of your "IV bottle" technique, but instead snaked a tube through the spokes (wheel left on). I pumped the fluid in with a big syringe designed for setting oil level in motorcycle forks.
Did you look at my DIY? I show exactly how to get to it and which tools.
DC
Sure did. Found it very helpful thanks. Just got a little nervous when my service manual showed contradictory information on the fill plug location. Don’t want to put it in the wrong hole
02-10-2022, 12:45 PM
Rear Differential Fill Plug
