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Is it really possible for excess oil to prevent gear shifting in a manual transmission?? I’ve heard of automatic transmissions being sensitive to oil level since they shift on hydraulic pressures, but a manual transmission only has gears sliding on shafts, and synchro rings made of brass engaging a tapered steel surfaces. I can’t see how excess oil could hurt anything but possibly the rubber shaft seals (due to elevated gear case pressure?)
I have read that some manual transmissions will baulk at high rpm shifts. I know my S51 transmission occasionally doesn’t like to shift at high rpm. But what’s the point of a high revving 2zz engine if you can’t shift gears, at high rpm? I believe there are hundreds of 2zz engines running with C60 transmissions. And I doubt they all shift gears at low rpm’s.
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