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.
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