I had a leaking pinion seal and right side wheel seal on my 88 K5 10 bolt. Just fininshed changing pinion seal and both wheel seals about 2 hours ago (I had my 8 and 6 year old boys out there learning some shop stuff). While changing the fluid, wow,it didn't look all that good it had a brown rusty look. Any-way cleaned it up and noticed I have 2:73 gears, Yuk! I need to start thinking about replacing them or maybe go with a Dana? I don't know. I want to Lift it and put bigger tires on it. Well, I'll have to wait for some cash-o-la or strike it rich. Have a great weekend all.