WHAT GEARS (REAR END) DO YOU GUYS THINK ARE IN A 96 F-250 XLT,NON HEAVY DUTY? ALSO MY REAR END DOESN'T EVEN HAVE LIMITED SLIP, SHOULD I PUT A LOCKER IN HER, OR ANY SUGGESTIONS ON WHAT TO DO AND FROM WHERE (PLACE TO PURCHASE)? I DO NOT HAVE THAT MUCH MONEY SO NEED SOMETHING VERY RELIABLE BUT AFFORDABLE. THANKS