Dana 35 differential gear a little chewed up (some metal shavings inside).
So I changed my differential fluid again after noticing a leak from what appeared to be the pinion seal failing. I noticed some metal shavings inside the differential and also that the oil seemed silvery. After I took off the differential cover I noticed one of the smaller gears (one of the four grouped together next to the large one, see picture), seemed to have some small chunks missing; it also has some play when I moved it. There doesn't seem to be any kind of performance issues as of yet though. I cleaned it out with brake cleaner and got all the metal shavings out, and replaced the oil and sealed her up. What do you think, is it necessary to replace that gear?