Black Diff ?
#1
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Black Diff ?
I just changed my rear differential for the first time a few weeks ago, and the oil that I took out was Black or a real dark gray. .. I figured it was just because it had been 17 k mileage, but then I just changed it again last nite (to get the rest of the black crap out) and it was the same black color again ....Is this normal ?
#2
Diff fluid should be changed on this car annually or about every 10K miles. Anytime the fluid gets that cruddy, it will not completely drain out, especially if you do it when the diff is cold. Therefore, if you change it again right away, the rest of the remaining crud will get flushed out. You should NOT worry about what it looks like. Diff fluid is notorious for looking like mud. This doesn't mean that the fluid has stopped working.
Now that you've done it twice within such a short period of time, do it on at the interval I mentioned and you'll be fine.
Oops, edited to read: should NOT worry (above)
Now that you've done it twice within such a short period of time, do it on at the interval I mentioned and you'll be fine.
Oops, edited to read: should NOT worry (above)
#5
For your interest:
Here is Redline diff fluid. Left was in the diff for about 2500 miles, right is new.
Here is Mobil 1. Left was in the diff for maybe 2500 miles, right is new.
Here is OEM fluid ('04) with about 2000 miles on it on the right, new Mobil 1 on left:
I would consider most of these "old" fluids as "clean", so this is a relative term.
Here is Redline diff fluid. Left was in the diff for about 2500 miles, right is new.
Here is Mobil 1. Left was in the diff for maybe 2500 miles, right is new.
Here is OEM fluid ('04) with about 2000 miles on it on the right, new Mobil 1 on left:
I would consider most of these "old" fluids as "clean", so this is a relative term.
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#9
Originally Posted by APEXSEAL,Jul 26 2005, 10:43 PM
Very small change in color for the Red Line stuff, huh!!
I should revise those mileage figures now that I've found the thread where I conducted the experiment. It was 2500 mile interval for both the Mobil 1 and the Redline.
Here is that thread:
https://www.s2ki.com/forums/index.php?showtopic=141409
(I'll go back and edit the figures in this thread.)
#10
Originally Posted by SimbaDogg,Jul 27 2005, 12:29 AM
beautiful glasses i must say
(They are about 30 years old and I got a big whack of them for free when I bought Shell gas. So they aren't what you would call "high class". )