I have an 80lb Terrova that I just changed the shaft on. Mine was too short 45". Minn Kota sells all of the parts for a rebuild. I bought the seals, shaft, new wires , Coiled power cable and an extension cable for the Sonar 283.00. The hardest part was there is very little room for the wires to go up the shaft. I would do it again but would do away with the sonar as that cable takes up a lot of room and makes it a much harder job. Mine has been in use since early 2012. The brushes looked new every thing else was in good shape.
Don