sherman trans

joe201 · Oct 23, 2017

I was wondering how hard to put a sherman trans in a 54 NAA and what additional parts that I will need.
Thanks Joe C

Kirk-NJ · Oct 24, 2017

If it's a combo with the same style input shaft that's used in the 8n It's not that hard. A tractor split is required and you will have to drill a hole in the side of the case. Some guys drill the pin that holds the fork for the throw out bearing and remove the shaft but if you slide the shaft to one side and if you remove the Sherman nose cone/input shaft you can snake it in. The Sherman trans fluid should be filled at instillation but since the Sherman uses the same fluid from the trans I would suggest you change your tranny fluid at the same time.
I have never put a step up or step down in an NAA or hundred series model. I suppose it can be done but the handle location and the bump out for the starter might be a problem. If you are going to try to install a step up or step down in the NAA let me know cause I have some step ups out and NAA trans cases out and I can take some measurements for you to see if it's doable

Kirk

Kirk-NJ · Oct 24, 2017

I would add one more thing after you install the Sherman I usually tip the nose of the bell housing down with a pan underneath. In a couple of hours if nothing is in the pan I will button it up. I hate having to resplit the tractor because of a leaky gasket. BTDT.

J. J. R. · Nov 14, 2017

I installed a Sherman step-up step-down in my Jubilee a few years ago. The one important thing you need to do is to shim the Sherman to the rear end. My Sherman came with the adaptor mount and various thickness of shims. There is a process of shimming by measuring the drag on the front input shaft of the Sherman after it's installed. It's a little tedious, but worth it to protect the bearings. I was lucky to get all this information from the guy I bought the rebuilt Sherman from. After the Sherman was installed, we took as many measurements as we could to determine the shifter hole location. Then drilled a very small hole to see how close we actually were. Then made any location adjustments on the case, and drilled the finial larger hole. I finished it off with a nice rubber grommet I scrounged up. It all worked out very well. Best of luck with your project.

sherman trans

joe201

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Kirk-NJ

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Kirk-NJ

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J. J. R.

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