S2000 Under The Hood S2000 Technical and Mechanical discussions.

Cold shifts

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Old Oct 18, 2009 | 05:12 PM
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Thumbs up Cold shifts

I've noticed this getting worse as its getting colder out 1-2 and 2-3 shifts are pretty notchy then as it warms up it gets smooth. Is this just normal? Its got about 14k miles and I doubt the trans fluid has ever been changed. Would it help to switch to a synthetic trans fluid?
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Old Oct 18, 2009 | 05:22 PM
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Normal. Read other postings on this topic.

Do switch the fluid out, it'll be an improvement.
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Old Oct 18, 2009 | 05:30 PM
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I just shift slow when it's cold.
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Old Oct 18, 2009 | 06:49 PM
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lol@thread.

At first I was wondering WTF only 8K miles on an 01??? then I noticed the date...

Btw, IF you DC 1-2 shift, it will considerably lessen the notchy shift.

Call me crazy, but more than just me will attest to it fixing the problem.

My theory (as an engineer, you always need a theory... but this is a after the fact theory a possible explanation for why it works)
is:
1) it gives the input shaft time to slow down, so just shifting it to N, then waiting a sec, then popping it into 2 might work just as well
or
2) it forcibly slows the ip shaft down when you clutch out in N since the engine revs drop.
or
3) a mixture of 1&2.

Btw, fresh TF is a must for silky smooth shifting... I <3 Redline MTL, others love Honda MTF, GM Friction Modified Syncromesh, Redline MT-90...

Just try a few, pick one that fits YOU & your climate & your driving habits...and you'll love the s2k shifting action.
from other thread.

DC = double clutch = shift out of 1, let off clutch, clutch in again, shift into two
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Old Oct 18, 2009 | 06:57 PM
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Yes, changing the fluid may help (go ahead and change your diff fluid while your at it). Also when it's cold out, while warming the car up, I actually depress the clutch and row through all the gears before actually taking off. I started doing this after I read about another member doing it. Seems to help IMO.
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Old Oct 18, 2009 | 07:49 PM
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its common..just shift slower so you don't get the grind and as someone else said new fluid could help a little
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Old Oct 18, 2009 | 08:28 PM
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i agree, its pretty normal, fresh mtf will help
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Old Oct 19, 2009 | 03:11 AM
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Originally Posted by ikeyballz,Oct 18 2009, 06:49 PM
from other thread.

DC = double clutch = shift out of 1, let off clutch, clutch in again, shift into two
ah damnit not double clutchin like I should be

thanks all just wanted to make sure, I'll have to change out the fluid soon
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Old Oct 19, 2009 | 05:12 AM
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Originally Posted by GregFarz78,Oct 18 2009, 05:12 PM
Its got about 14k miles and I doubt the trans fluid has ever been changed. Would it help to switch to a synthetic trans fluid?
I'd recommend changing it at 15K or earlier. Honda MTF is good.
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Old Oct 19, 2009 | 05:31 AM
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+1 for the Honda MTF. It works as good as the GM Synchromesh Friction Modified and lasts longer. I change mine every 10-12k.

I was only getting about 6k out of the GM Synchromesh Friction Modified
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