So you have sliders by the sound of it. I have had bad experience with them, so I personally don't recommend them.
However, others have had zero issues, so I can't say what the difference is in the situations, that it works perfectly for one, and issues for others.
Perhaps the they are installed,
or the variator has a certain type of wear.
Just guessing here.
I went with a sports variator, and ditched the rollers they provided, and used my stock rollers, and got a better top end with lower revs, thus saving on the engine wear and tear.
Well, that is the theory, anyway.
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