What is grinding? - MR2 Owners Club Message Board
 
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post #1 of 13 (permalink) Old June 7th, 2007, 23:40 Thread Starter
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What is grinding?

What *EXACTLY* makes the grinding noise when I mis-shift, or shift wrong?

I don't really understand the whole clutch, tranny plates, cables, etc deal with manuals. How it all works at least. I want to know what I'm HURTING when I hear that lovely little crunch.

Tonight I was making a turn and tried downshifting into 2nd, CRUNCH! Seems like it's happening more nad more often, but my clutch feels great. I'm doing a transmission drain and fill soon so hopefully it fixes it all. Just wondering though, what am I hurting? The entire transmission? Something that can be fixed simply in parts? Can a single "gear" go bad, but the rest are fine? If so, can I just fix one gear and save moeny, or should I consider a whole new tranny?

Driving normally everything is fine. I can drive for a month and have no problems. It seems that whenever I drive aggresively though, and try to shift "faster"...it wants to get stuck in almost every gear. Almost always going into gear, not out of gear. Mainly in 2nd and 4th gears.
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post #2 of 13 (permalink) Old June 7th, 2007, 23:56
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when you let the clutch out and your not in gear compleatly then one of the gears is not in contact with the other gear and when your keep trying to put that gear onto that other gear the teeth start to rub oneanother and that makes the grinding noice.

and when your driving aggresivly just hold the clutch in a little longer till you get into that gear
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post #3 of 13 (permalink) Old June 8th, 2007, 01:52 Thread Starter
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Hmm, that seems to make sense. Do you have any pictures of the breakdown of a transmission? Any manual tranny really...showing the gears and such?

Really...just an article explaining the parts, how they interact, etc. I would just like to know. It bugs me driving a manual, and not knowing exactly how everything works.

Also, is it possible to strip the gears of teeth? I'd imagine when draining the fluid I would see bits and pieces fo metal. It didn't grind hard really...I am just paranoid. The instant I heard it grinding I slammed in on the clutch and went back to neutral. Kind of killed my nice little turn haha.
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post #4 of 13 (permalink) Old June 8th, 2007, 04:46
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don't know if this'll help you, but :

http://auto.howstuffworks.com/transmission.htm
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post #5 of 13 (permalink) Old June 8th, 2007, 11:03 Thread Starter
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It's a start! Thanks, I totally forgot about that site.
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post #6 of 13 (permalink) Old June 8th, 2007, 11:30
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post #7 of 13 (permalink) Old June 8th, 2007, 12:26
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I recommend howstuffworks.com for all of your basic car questions! lol, I learned SO much from that website, it's insane. Just go on there and cruise through the auto section, if your like me - you may waste a work day or two at that site
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post #8 of 13 (permalink) Old June 8th, 2007, 12:56
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Quote:
Originally Posted by squid?
when you let the clutch out and your not in gear compleatly then one of the gears is not in contact with the other gear and when your keep trying to put that gear onto that other gear the teeth start to rub oneanother and that makes the grinding noice.

and when your driving aggresivly just hold the clutch in a little longer till you get into that gear
GEARS never actually grind (expect maybe going into reverse) as they are always engaged. Syncros or dog teeth are what make that grinding noise. Read the how stuff works article... it explains it pretty well.
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post #9 of 13 (permalink) Old June 9th, 2007, 00:04
 
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check this out-it explains everything http://www.carbibles.com/transmission_bible.html
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post #10 of 13 (permalink) Old June 9th, 2007, 00:38
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I don't know if you guys have ever seen the screen saver that puts together a 16 valve 4 cylinder and then shows it running, someone should make that for a transmission or a transaxle becuase I really don't know much about how gears and syncros work.
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post #11 of 13 (permalink) Old June 9th, 2007, 09:38 Thread Starter
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I think I have that screensaver lol. Thanks for the links guys.
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post #12 of 13 (permalink) Old June 9th, 2007, 21:42
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Could you post the screensaver as an attachment? I wouldn't mind having that one for myself.
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post #13 of 13 (permalink) Old June 10th, 2007, 00:50 Thread Starter
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Or better yet, a link so I don't have to upload it myself!

http://www.eng.auburn.edu/~pjones/MECH.4410/deutz/

you need to download those to 1 file on your PC. Then run the .scr to see it in action.

I believe that's the right one. I actually couldn't find the file on my PC so I just Googled for it again.
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