duct tape & zip ties
Join Date: Jul 2006
Location: Willis, MI
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You can do a vacuum test on the lines. This will help pin point where the leak is. But I can pretty much tell you it is the seal on the inside of the hub. Pretty common problem. Personally I would replace the hubs with Warn premium hubs. When you are going to use 4wd often just leave them locked in.
My factory hubs don't work automatically no more. I drive around from Oct. 1st till mid april with the hubs locked in. The only thing it really does is drop my milage about 1mpg.
When I want 4wd I turn the switch the t-case engages and I am in 4wd. When I am done with 4wd I just flip the switch back to 2wd drive.
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Your Actions Today, Decide Your Future Tomorrow
2005 6.0 Crew Cab Long Box Lariat, current truck
2004 6.0 destroyed by contaminated fuel
2002 7.3L burnt