I don't think anyone has had an issue with their manual transmission itself being bad.
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I don't think anyone has had an issue with their manual transmission itself being bad.
I agree. It seems clutch adjustment is the likely cause but it's hard to tell from here.
Did you try out the Redline gear oil? How are you liking it?
You need 75W80, GL4, certainly not a 75W90 GL4 and 5.
Despite the rating, a 75W90 is much thicker when cold than a 75W80. Now, according to the rating, both should be about equal when cold, but this is almost always not the case!
You may want to do some research in the net, in particular download the data sheets of your favorite sort of oil and compare the cold and warm viscosities to competing products.
There definitely are reasonably priced fully synthetic 75W80 GL4 available! Take your time to do some searching on the net and you will find.