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2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck.

time to change my fluids.

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Old 05-22-2013, 05:52 AM
  #11  
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Originally Posted by I just don't know
The diff fluid is a lifetime because its full synthetic that being said. You should change it if the axle is ever submerged in water. Or usually around 100 k I believe the clutch packs needs to be serviced on the t lock if you have one so at that point you would Change the fluid.
100k is not lifetime...
Old 05-22-2013, 11:18 AM
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The fluid itself is it's other stuff that causes it not to be. Say you don't have a Ls diff and you never submerge you axle. According to what I can find its a lifetime fluid.
Old 05-23-2013, 03:24 PM
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Old 05-25-2013, 06:32 PM
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I change my brake fluid to dot 4 power steering the valvoline and the rear end to royal purple simple because i melted the bearing the housing..... To many burn outs
Old 06-03-2013, 03:36 PM
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05FordPower, did you have any issues with the RP fluid? Another member stated his rear diff made noises when he used AMSOIL.



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