Ford Focus Forum, Ford Focus ST Forum - View Single Post - not so stock transmission issues
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Old 10-05-2012, 05:46 PM   #8
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Join Date: Jun 2006
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Location: Darwin, MN
What I Drive: 2000 & 2001 ZX3's

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Yes the grind/lockout is a trans issue.
The syncro's can't match speed fast enough at high RPM. Using a lower viscosity fluid helps.
I run 5w-30 motor oil and shift without issue @8,000RPM.
The thinner fluid allows the syncro's to catch up faster, less resistance.
Don't "think outside the box".
There is no box.
Do it correct, or do it twice.
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