I just had my Getrag rebuilt. Trying to find someone that can rebuild it for you is the hard part. If you have the mechanical ability and tools to pull the transmission, then thats a different issue. That was a project beyond my skill level. The costs when I priced it were about $2,500 to have the Getrag rebuilt and about $4,500 to get the NV4500 installed. Going to the NV 4500 there are extra parts that you have to buy. I went with the rebuild. I have some noise in nuetral that I did not have before, but it works well. The original pilot bearing ate the input shaft, but otherwise there were no extra parts needed. There is a real difference of opinion on the strength of the Getrag vs the NV4500. I went with the opinion that the Getrag was better than the NV4500.