S2000 Under The Hood S2000 Technical and Mechanical discussions.

Lost 5th gear

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Old Oct 18, 2020 | 09:13 AM
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Default Lost 5th gear

I’m new to this website and forum, but I need some help. I have a 2000 with 31,000 miles. The beginning of summer 1st and 2nd started grinding, my BF made some adjustments and fixed that. Then like a month later 5th went and it was slipping out of 6th. Now 6th is fine, but I still don’t have 5th. My boyfriend, whom is a mechanic (diesel mechanic) thinks I need a rebuild. I really don’t think I do, mainly because of the low mileage and the fact that I don’t beat it, or race it. Why the hell would I need a tranny rebuild at 30k miles?!
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Old Oct 19, 2020 | 04:18 PM
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What did he do? If you're transmission is grinding check clutch hydraulics and transmission fluid first. If the master is leaking or there's air in the line you will grind. If your transmission fluid is really old shifting gets hard and it will wear out the synchros quickly, especially the brass ones on the AP1.
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Old Oct 19, 2020 | 08:47 PM
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Does "I still don’t have 5th," mean you can't get the shift lever into 5th? Or you can get it into 5th, but it pops back out?

Thanks!
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Old Oct 19, 2020 | 09:26 PM
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Originally Posted by windhund116
Does "I still don’t have 5th," mean you can't get the shift lever into 5th? Or you can get it into 5th, but it pops back out?

Thanks!
I can not get it in to 5th at all! It was pooping out of 6th, but now 6th is fine, still can’t get it in to 5th tho!
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Old Oct 19, 2020 | 09:27 PM
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Originally Posted by Slowcrash_101
What did he do? If you're transmission is grinding check clutch hydraulics and transmission fluid first. If the master is leaking or there's air in the line you will grind. If your transmission fluid is really old shifting gets hard and it will wear out the synchros quickly, especially the brass ones on the AP1.
it’s not grinding in 1st and 2nd anymore, it just won’t go into 5th now!
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Old Oct 19, 2020 | 10:14 PM
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You know if the clutch has OEM parts in it? If so... then have your BF change the gear oil, to OEM Honda MTF or Royal Purple Synchromax. Then, pray this works.

If not, could be an internal issue with the transmission.
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Old Oct 20, 2020 | 10:10 AM
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What adjustments did he make?

How much freeplay does the pedal have?

What fluid is in the trans?
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Old Oct 20, 2020 | 12:47 PM
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10 min fix.

Its been a while, search “lost 5th at a track day” I have a fix
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Old Oct 20, 2020 | 12:51 PM
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Here it is:

https://www.s2ki.com/s2000/topic/872..._fromsearch__1
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Old Oct 20, 2020 | 01:09 PM
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Note the reference to "skip shifting" in the link. That means skipping gears on the way up or down. This is not being kind to the gearbox. On a race track you may have to abuse the gearbox for a second or two drop in lap time -- but you're already abusing the whole car,. On the street it was long ago recommended to me to engage every gear. As far as I know it's not necessary to let the clutch out just go into the next gear and work your way up or down.

-- Chuck
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