We had a leak out of the input shaft at the top of the steering box, so I bought the reseal kit (not the fill kit, just for the input seal). Steering box works fine and I don't think it needs a rebuild other than the seal kit did not fix the leak out of the input shaft. I'm going to try some stop leak first, but I'd hate to pay to rebuild it or buy a new one since it works perfectly fine. Any tips from anyone that has done this? Seems like a common leak issue but I haven't seen it be persistent after changing the seals.