Rear End Oil Change, Need answer quick !!
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Junior User
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Rear End Oil Change, Need answer quick !!
Reading thru Customz step by step process to change the rear gear oil, he states the change will also need to include 4oz of modifier
However, my Ford book calls for 8oz of the modifier.
Need to know what to do quick, getting cold and dark on me
Thanks
However, my Ford book calls for 8oz of the modifier.
Need to know what to do quick, getting cold and dark on me
Thanks
Posting Guru
Joined: Jul 2006
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From: New York
Postmaster
Joined: Mar 2001
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From: So Cal
Try 4oz to start. If the diff still chatters on slow tight turns add more until the chatter just goes away. Don't use too much.
Some diff fluids do not require additive, check the bottle and see if the truck chatters.
Good Luck,
Jim Henderson
Some diff fluids do not require additive, check the bottle and see if the truck chatters.
Good Luck,
Jim Henderson
Post Fiend
Joined: May 2006
Posts: 10,007
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From: Central Florida
Some people like to double the friction modifier in diffs. Others use oils with modifiers already in them. With the oil they were using, they may have already had some modifier in it and they only wanted some fomoco in there too.
Post Fiend
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From: Central Florida
The diff chatters and makes a little noise while you take corners. The modifier is just to reduce the noise.
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The idea is that 8oz is normal and the LS slips more, and 4oz makes the LS slip a bit less and work more agressively. If it grips too tightly on 4oz and chatters around turns, you can add more until you're happy.
At least that's how I understand it from past threads.
At least that's how I understand it from past threads.
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