I had some minor work done on my '87 Blazer today. I had my complete drive train serviced. When they had the cover off the differentials I was able to read these numbers off of the ring gear: 2GM 260151031 13 40 1 92 Can anybody tell me what gear ratio I have. The guy doing the work gave me a number that really surprised me. I need to confirm it. I didn't have time and didn't want to get in his way to count the teeth. The covers have 10 bolts in them and he said it was a Dana 44.