What color is diff fluid supose to be when checked - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 09-19-2007
01 ranger's Avatar
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What color is diff fluid supose to be when checked

My diff fluid is a dark brown color. It looks nasty and im sure its not supose to be like that. Any help is appreciated. Thanks
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Old 09-19-2007
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Yep, dark brown is about right for used gear oil. You should be ok, how many miles do you have on the truck?
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Old 09-19-2007
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with your truck being on '01, you should go ahead and change it....but to answer your question, gear oil is susposed to be dark brown and stink....
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Old 09-19-2007
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if its white that means water got in it. but ya, it smells pretty bad
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Old 09-19-2007
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Cool. Thanks for the help. It has 77,000 miles on it. I feel alot better knowing its ok. I will be changing it in the near future. I have to make a 3 hour trip tomorrow and just wanted to be sure. thank again for the help.
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Old 09-19-2007
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you should change it as soon as possible....it isn't critical, but 77,000 miles is a bit for diff fluid...
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Old 09-19-2007
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yeah i'll probably do it tonight just to be safe
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Old 09-20-2007
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Geez, I change mine every 30,000 miles
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Old 09-20-2007
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Quote:
Originally Posted by lifted97ranger
and stink....
um yeah id say
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Old 09-20-2007
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my front has come out like, olive drab a few times...
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Old 09-20-2007
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has your tcase every been drained....mine has never been changed until last week at 72k....and all I can say...is YUCK.
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  #12  
Old 09-20-2007
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Quote:
Originally Posted by lifted97ranger
you should change it as soon as possible....it isn't critical, but 77,000 miles is a bit for diff fluid...
I have 120k on my 98's stock fluid and it seems fine?

I can understand preventative maintnance But I dont think ford recomends that you change it to much i mean yeah 100k its time for some new fluid I dont know how many miles you think you should change it?
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Old 09-20-2007
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Quote:
Originally Posted by 01 ranger
I have to make a 3 hour trip tomorrow and just wanted to be sure.
You are worried about a 3 hour trip? Ha...come to Texas where a 3 hour trip isn't bad. Make an 8-9 hour drive to the south part of Texas, and then we'll talk of being concerned.

No grinding, whining, metal/bit chunks, or watery dark dark brown oil? Your fine. Diffy 90 weight oil is pretty stout...
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