mr_g, try searching this forum using the word "syncromesh." There are several good threads here on the subject.
I like Specialty Formulations MTL-P and MTL-R for manual transmissions. One is a 75W-85 GL4/5 and the other is a 75W-90 GL4/5. Both real synthetic formulas as opposed to the fake stuff put out by many oil companies.
If your car calls for a GL-4, don't use a GL5. And ATF is way too thin for any Nissan manual transmission I've ever heard of.
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--- Bror Jace
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