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I have a small gear oil leak coming from what I believe is the front diff (I'm not super familiar with IFS), it appears to be coming out of a sensor or something on the side of the diff and I'm having trouble identifying exactly what this is. Any ideas? Is it hard to replace and how long can I let this go before fixing it? I'm currently out on a road trip and would like to get back to my mechanic in Denver if possible. Thanks!

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That would be the 4WD actuator.
Unclip the wires to the actuator and unscrew the actuator.
 

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Thanks guys, I'm assuming taking this off won't drain all the fluid? Just curious since I'm doing this in a campground!
You might see a little fluid from the case but it shouldn't all run out. Whether you replace the oring seal or replace the whole unit, have it ready to go when you do pull it and you'll minimize any leakage
 
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