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Old 03-14-2008, 01:56 AM   #1 (permalink)
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1st to 2nd gear grind in VTEC!!!:(

Ok so when I try to go into 2nd from 1st in vtec the gears just grind... and grind... I can't figure out what is wrong... at first I thought maybe I have to shift into second before the red line but did no good either... I tried shifting at 7200 but it still happens.. I noticed that when the car is launched from a stop I dont have the problem... but if i'm cruising in first and kick in vtec and try to go into second the gear grinds and it won't go in... does anyone have this problem?
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Old 03-14-2008, 01:59 AM   #2 (permalink)
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I had the same problem with my clutch grinding into second. I took it to the dealership where I bought the car from and they replaced the clutch under warranty. $0. I can scan a picture of the receipt if you want.
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Old 03-14-2008, 02:01 AM   #3 (permalink)
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Old 03-14-2008, 02:08 AM   #4 (permalink)
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sorry but i looked everywhere and yes a receipt would be great thank you
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Old 03-14-2008, 02:25 AM   #5 (permalink)
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same thing happened to me before and it would do it only on the 1-2 shift in the upper rpms. one day it grinded and my 2nd gear syncro went bye bye. the dealership replaced the defective syncro and haven't had that problem since.
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Old 03-14-2008, 02:40 AM   #6 (permalink)
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was this done under warranty? or did you have to pay out of your own pocket... it's really annoying. I dont even mind the 3rd gear pop as much as i hate this!
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Old 03-14-2008, 03:06 AM   #7 (permalink)
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its easy to grind from 1st to 2nd at high rpm's. from what i've read it has something to do with 2nd being taller than it should be. Whenever i shift from 1st to 2nd around redline i make sure to take my time and really engage the gear to prevent grinding.
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Old 03-14-2008, 01:08 PM   #8 (permalink)
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Having trouble shifting from 1st to 2nd

Quote:
Originally Posted by DetachmentBravo View Post
All you need to do is make sure to rev match on your up shift. What is happening is that the engine is either rotating too quickly or too slowly to match the speed of the vehicle in the selected gear. Trust me this drove me nuts on my EX for six months, but I learned to compensate for it.

To better explain what is going on, let me explain a different scenario where a lot of people (including myself) want to blame the gearbox instead of ourselves. Many times while down shifting, especially into second gear, it feels as though the transmission "sticks". In reality, what are feeling are the synchronizers in the gearbox attempting to match the speed of the gear to the speed of the engine. The synchronizer for second gear usually gets such a workout that Honda actually uses a double cone synchro for second gear in most, if not all, of their designs.

I'm not going to go too in depth about the finer points of rev match shifting, but on the upshift the technique is simpler than you might think. All you need to do is have a very "light touch". When you shift into the next gear, depress the clutch, take the car out of gear, but before putting it back into gear pause in neutral for just a moment. Put only a slight pressure on the shifter pushing it into the next gear. The resistance you feel is the synchronizers. As your engine's rpms drop to the perfect level so that it is spinning in unison with your gears, you will suddenly feel the shifter being "sucked" into gear as the resistance from the synchronizers goes away.

Once I mastered this light handed technique, my shifting has become smooth as silk, almost like I was driving an automatic. I'm getting pretty good at rev-match down shifting as well but I need more practice with getting just the right amount of throttle. Eventually I hope to master the heel-toe downshift, but my coordination isn't there yet.
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