2006 L3940 GST Front/rear axle seep repair estimate

[okiecraig]

Bought new, has 2700 hours. Started seeing drips inside right front tire, seems to seep about a 1/2 cup every week. Been going on about 6 months, only takes a a few squirts of 80/90w gear oil to refill when I check it before use. Just noticed a few drops on floor inside rear wheel, right side.

Thinking about having hauled to mechanic/dealer for repair as I am greatly annoyed at fluid leaks - been very careful for 18 years to maintain properly. Anyone had this work or similar done recently that can give me a ballpark estimate for replacing seal on a front wheel or a back wheel?

 

[okiecraig]

Hooboy, got some estimates for recommended work. Almost $ 4,000 parts and labor for the following:
Replace front axle pivot seal, bearing,
Replace rear wheel axle seal, bearing, (will lose $250 UDT put in last July and cost $250 or more to refill))
Replace fuel sensor (rusted out?)
Perfrom valve adjustment (diesel engine) just because never done in 2700 hrs/16 years. Say they have to remove heat shield and fuel tank. Engine start perfectly every time and sounds smooth, but I ain't a mechanic.

Your thoughts on any or all of the above?