being that your tag says you are in Washington and that you deliver mail I am guessing that the 4x4 is a necessity not an option especially if you are in a rural area.
I would suggest change your axle fluids to synthetic especially if it time to change it.. try and shed some unnecessary weight if possible pull full size spare for a space saver. Depending on your jeeps model and year maybe look to get a new coil change your wires cap and rotor if you have them and make sure that you run the higher tire pressure.
That is what I would do , doesn't mean I am correct. I am sure some more creative suggestions will be on their way soon
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2012 Chevrolet Traverse *active*
2002 Oldsmobile Alero GLS *active*
2002 S10 2wd p/u 139,000mi. *active*
1975 Corvette Stingray *active*
1994 Camaro Z28 Convertible 149k *Sold 2013*
1998 Blazer ZR2 189k *Sold 2012*
1995 Tahoe LT 250k *Sold 2011*
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