new fluid in the front and rear end - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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Old 08-29-2010, 11:46 PM
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new fluid in the front and rear end

ok so i wanna change my fluid int he front and rear end what wud yall reccomend.. and also anyone know how much a detroit locker is
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Old 08-30-2010, 05:40 AM
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I haven't read the manual on what they recommend but it's probably 75W-90, but don't quote me on that. A Detroit Locker will run you about $700-800. Out of curiosity, why are you changing your differential fluids. I don't think you need to for about 100,000 miles. I may be wrong.
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Old 08-30-2010, 11:06 AM
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Here's the page from the owners manual.

I have a MagHytec cover holding almost 6 qt. of Redline 75w140 plus 2oz of their friction modifier in my rear end. Works great, I changed it with less than 50k and gained about 1 mpg. The stuff that came out was surprisingly dirty.

In the front I have Mobil 1 75W90. I wanted to use Redline again but wasn't able to get it at the time. I don't recomend the MagHytec cover on the front of a stock height truck, you'll have interference problems.
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Old 08-30-2010, 12:15 PM
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k sounds good man and idk i just wanna change it truck has been wheeled alot and raced i just wanna change it haha
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Old 09-07-2010, 12:05 PM
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^^ drives the truck like its stolen at ALL times. i can count probably 15 4wd launches with me in the car and thats only during summer break!
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