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Old 12-20-2009, 08:18 PM
usamarshal usamarshal is offline
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4x4 Differential Fluid Change

2004 Chevy Sub 5.3 4x4 Z71

My manual says to change the fluid every 50k. Was wondering what the deal is if I hardly ever use the truck in 4 wheel drive? I'll be changing the rear diff for sure as I'm approaching 60k with no hard driving and/or hauling. Thanks for any advice/info.
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