[wneubauer]

I just spent the last hour and a half driving around McKinney TX looking for differential lube for an 05 3500 11.5 rear end. I couldn't find anything that I was familiar with....

I saw "super tech" (or something like that) at Wal-Mart, and "Lucas" at O'Reily's.... No major brands.

Any ideas on where I can buy the 75-90 I need around here? (North dallas or anywhere in the metroplex for that matter)

Anyone know anything about the Lucas product?

I was also given the "warranty voiding" warning by a guy at a parts store if I didn't buy Mopar diff lube. Anyone had this problem?

Any help or advice on this would be much appreciated.