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A stethescope is a very good tool for determining the source of the BAD BEARING. sorry, bu that is where a whine will come from. I'd always thought that it was straight cut gears, but when mine finally turned to a clunk, it turned out to be a bearing in the main transmission shaft. The good news is this is easy to fix....you take off the engine (you know how to do that) and then unbolt the tranny from the rear end (yuou do have to remoe the PTO lever/cover first). I am not sure how a sherman comes out, but on mine, the bearing carriers come righ off, and then you can install new tapered roller bearings and seats. I only needed them on the main shaft. You adjust the end play with shims under the bearing carriers. I had too many, and so the shaft had too much end play. You'll see when you get it apart. What a difference. Now it's silent (well... compared to before). While you are in there, prepare to deal with 60 years of sludge buildup. My wife has banned the N from the garage after that job! Take Care
Steve
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