[yankeeralph]

I need to change the driven gear in my TH350 from a 39 tooth to a 45 tooth, but I found out the 45 tooth will not fit in the present holder(retainer) for the 39 tooth (slightly larger stem diameter as well as outside tooth diameter). I noticed that the present holder has numbers on the outside, like 36, 37, 38, 39 which I now assume is the size of the speedo gear that can be installed in this holder. Do I need to get a different holder for the 45 tooth (where?) or do I have the wrong speedo gear, or worse yet do I have to get a different drive gear for the transmission shaft? Thanks