Just wondering if i bought the right ones. 3.42 gears off ebay. Its been awhile since i pulled a set and i just feel odd looking at them. Does it look like they are for a 8.5 diff? Heres the number 1235128 12 41 9? 89 .. I know 12 -41 is the 3.42 ratio and im guessing 89 is the year. Whats the other numbers come up as?