MA87K5
1/2 ton status
I have a 12 bolt rear with an eaton posi in it. when I checked the rear the fluid was black. No flakes of metal at all. I put in posi additive and 80w90 gear oil. Why would the fluid be black? Thanks
CK5
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black fluid
- Thread starter MA87K5
- Start date
pauly383
Daddy383
The fluid is probably just old. I just got a 12 bolt with dark fluid too. Just change it and your seals while your at it. /forums/images/graemlins/k5.gif
MA87K5
1/2 ton status
The fluid was put in new with the new eaton in 2003 over the summer.
Pookster
1/2 ton status
You sure it was black? I know different manufacturer's sometimes have different colors- I know when my rear end got refilled, the lube my mechanic used was dark blue. When i changed it, mine was like motor oil colored with a tad of green hint.
Confedneck
3/4 ton status
gear oil mixing with LS additives can cause fluid discoloration, try an experiment in a plastic bottle and mix a little of each..see what happens.. /forums/images/graemlins/thumb.gif
MA87K5
1/2 ton status
it still smelt like gear lube, not burnt. Hopefully it is the mixing of the two fluids. Thanks.
