Hey calling all gear heads, my rear end cratered on the 97 Z71 and I have a free rear end if it's the same ratio as mine. I have 3.42's but don't know the ratio of the donor. It has GMK17 on the outside axle tube and is from a '92 4x4. I can't find info for an ID except for the RPO #'s on the glove box sticker, which the donor doesn't have. I do have another unit found that is from a '98 that is the same ratio but is $450 if this one isn't the same. The 450 bucks is still cheaper than having my old one rebuilt. It's all fun!