12-13-2006, 11:50 AM
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Hummer Guru
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Join Date: Jul 2005
Location: Idaho
Posts: 4,744
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Re: Diff fluid change interval
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Originally Posted by Hal
OK, next time if the fluid is black I'll taste it to be sure it's bad  Make a comparison test with the front diff fluid.
f5, I understand your point, I'm just still a bit curious...
It's not a question of the FLUID being good or bad... more to the point: what is going on in the REAR diff to make it black and have alot more metal fragments stuck to the magnet on the drain plug as compaired to the FRONT. I haven't seen that in any of my other 4x4 vehicles.
Did a magnetic drain plug show a lot of metal, or just a covering of metal on the plug? The breaking in process will result in some metal particles. Why it is darker, probably has something to do with the rear has more stress to it then the front. I guess we would need a chemical engineer to step in and explain that one.
Has anyone changed it a second time and found the same thing? |
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