I do this often. Some tips: Pump the grease by hand, SLOWLY. It takes a while for grease to work through, and come out the front. Especially if the fitting was last greased by hand, and the middle cavity between the front and rear is empty. It takes about 100 pumps before the new grease comes all the way through the front, and you can tell because the new grease is not blackened by use. It takes three tubes of grease to do all four wheels. The important point is don't pump too hard, or use a pneumatic gun. I'm convinced that the stories you read about seals blowing out are because of excessive pressure.
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Marty and Martha
2015 Z-1 211RD
2012 Nissan Titan
Dalzell SC
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