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Preserving transmission synchros

Originally Posted by NismoNY Is high rpm shifting necessarily bad for synchros even if it was done carefully and gently (not slamming gears and letting the shifter slide into place)?

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Old 02-24-2015, 08:43 AM   #1 (permalink)
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Originally Posted by NismoNY View Post
Is high rpm shifting necessarily bad for synchros even if it was done carefully and gently (not slamming gears and letting the shifter slide into place)?

You'll be fine, quick drastic changes do the most harm. High rpms put a lot of stress on everything, not just your transmission. But, plenty of people track this car getting it close to or at redline often under high load and still have their engine running fine for years now. You can change the fluid the Redline MT-85 or similar if you want the added piece of mind or feel you have similar issues to what people described above.

DIY: Transmission Oil Change
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Old 03-02-2015, 05:54 AM   #2 (permalink)
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Default Any truth to upgraded 5th gear synchros?

Came across 2 posts mentioning Nissan upgraded the 5th gear synchros in the later model Zs. Is this true?

2013 Nissan 370z

Sticky: 370Z Transmission Failures (6MT)
"Well known that the Z has crappy synchros.

They toughened up the 5th gear synchro in mid10 and again in early 11. By all measures the mid11s seem to have dramatically better 5th gear behavior."
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