S2000 Under The Hood S2000 Technical and Mechanical discussions.

Thumping sound when engaging 1st gear.

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Old Oct 25, 2007 | 11:12 AM
  #1  
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Default Thumping sound when engaging 1st gear.

I get this kinda knock thumping sound every time I engage 1st gear, like something falls in to place but has a hard time doing so. Is that normal in s2ks I have an 05 with 20000 mi on it. Is really annoying.
Thanks in advance
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Old Oct 25, 2007 | 11:23 AM
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yes, clutch in wait few secs then put in first..
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Old Oct 25, 2007 | 12:04 PM
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My car does the same exact thing..Not all the time, but every few times Im at a light..It almost feels like it drops and engages or something..wierd..
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Old Oct 25, 2007 | 12:11 PM
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I suppose you can say it
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Old Oct 25, 2007 | 12:45 PM
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cool thanks a lot guys. Thanks for going in depth slipstreem it looks like you know your shit. Load off my mind, thanks
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Old Oct 25, 2007 | 09:05 PM
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well said slipstream, well said
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Old Oct 26, 2007 | 05:17 AM
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I agree, you guys really know your stuff..Thanks for the info guys..I'll give that a shot, but I still find it odd b/c I've never experienced this with any of my other Honda's before..Good to know that I can avoid this now..Thanks!
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Old Oct 26, 2007 | 10:51 AM
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Originally Posted by Lex,Oct 26 2007, 05:17 AM
but I still find it odd b/c I've never experienced this with any of my other Honda's before..
i think it might be because its RWD, becuase a friend of mine has a IS and his does the same thing...i think
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Old Oct 26, 2007 | 11:42 AM
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[QUOTE=IlleztImportz,Oct 25 2007, 11:05 PM] well said slipstream, well said
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Old Oct 26, 2007 | 11:45 AM
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FWD cars usually have the engine & gearbox east-west, and therefore usually have bowden cables connecting the shifter to the gearbox.
Those cables make the shifting less "mechanical" but do smoothen out the process of shifting, IOW you select a gear less fast and more smooth.
It gives the synchro the time to do its work a little longer.

The shifter in the S2000 is right at the top end of the gearbox and the shift rods are metal, no flex, no smoothing and directly connected to the shift forks.
You push the shifter forward to select first its going to do that immidiately.
Clunck!

Btw .. there are some gear pairs (1st, 2nd & reverse) & synchro's spinning too in neutral.
All that mass has to be stopped and 1st being the "strongest" gear forward gives the most clunck in the drive line.


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