I have a set of 4.56 Genuine Gear ring and pinion set . I had installed them on a 2000 ford Excursion Dana 50 Up front and 10.25 In the rear .I used them probably for about 3000 miles and went back to my old set up (3.73) becuase didn't like them when I would take long road trips . I have had them for a couple of years ,but are in good condition . I am looking to get 200.00 for them or will trade for dual shock set up kit or Shock absorber remote control kit for the rx9000 shocks. having trouble posting pics but wil post later tonight.