Here are recommended greases from Dexter Axle service manual:
http://i.b5z.net/i/u/1080235/f/6-8K%...talog_3-04.pdf
Recommended Wheel Bearing Lubrication Specifications
Grease:
Thickener Type ............................................. Lithium Complex
Dropping Point ............................ 215 degC (419 degF) Minimum
Consistency .................................................. ....... NLGI No. 2
Additives ............................ EP, Corrosion & Oxidation Inhibitors
Viscosity Index .................................................. .. 80 Minimum
Approved Sources:
Mobil Oil ..................................... Mobilgrease HP, Mobilith AW2
Exxon/Standard .................................................. ... Ronex MP
Kendall Refining Co. ........................................... Kendall L-427
Ashland Oil Co. ................................ Valvoline Multipurpose GM
76 Lubricants ................................................. 76 Multiplex EP
Citgo Petroleum .............................................. Lithoplex MP#2
Mystik.......................................... Mystik JT-6 Hi Temp Grease
Pennzoil Product Co. ............ Premium Wheel Bearing Grease 707L