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#1
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How a manual transmission works... a question
Trying to understand more about manual's, and came across this
excellent article: http://auto.howstuffworks.com/transmission5.htm However, here's the part I don't get: What is preventing the driver from shifting into reverse while going 60 miles an hour? >From the colored diagram.... Please correct me if I have this wrong: The purple collars are always spinning when the car is moving. The blue, red, and green STOP spinning when the clutch is in neutral and the clutch is pushed in, or at least, spinning slowly from the friction of the output shaft (yellow) rubbing on the bearings that the blue gears ride on. TIA! |
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#3
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wrote:
> > Trying to understand more about manual's, and came across this > excellent article: > > http://auto.howstuffworks.com/transmission5.htm > > However, here's the part I don't get: What is preventing the driver > from shifting into reverse while going 60 miles an hour? > Absolutely nothing, I have done it. I hit reverse in a car once and only locked the rear wheels into a chirp when I realized it. Nothing blew up.... I was lucky.... Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's |
#4
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In article >,
Mike Romain > wrote: > wrote: > > > > Trying to understand more about manual's, and came across this > > excellent article: > > > > http://auto.howstuffworks.com/transmission5.htm > > > > However, here's the part I don't get: What is preventing the driver > > from shifting into reverse while going 60 miles an hour? > > > > Absolutely nothing, I have done it. I hit reverse in a car once and > only locked the rear wheels into a chirp when I realized it. Nothing > blew up.... I was lucky.... Yep, that would make two of us - Although I accomplished mine in a car with an automatic. Had this "hit the lights all green" strategy that seemed to do *WAY* better than 75% - Come off the the north/south freeway onto the east/west freeway leading into town, and mash the throttle for all it could give me/all traffic allowed in the space between the end of the off-ramp and the "Freeway ends 1 mile" sign. Usually that meant I'd be hitting somewhere between 70 and 80 as I blew past the sign. Bump the shifter into neutral, and coast in to the first light, which would (more often than not) change green just as I rolled up at about 40-ish. If I caught the first one, bumping it back into gear and holding at 40 would put me through the entire ten light sequence with every one of them green my way. One day I did this for probably the 100th time, if not more, only my "bump" was a bit too energetic, and I went through neutral and into reverse... <SHREEEEEIIIIIIIIK!> Smoking rubber, ass-end juddering around like it was about to go into bucking bronco mode, and me grabbing wildly at the gearshift with one hand while trying to keep the car pointed straight with the other, and the engine stalling out. It was a rather "interesting" ride that I don't have any wish to go on again! Didn't do any damage (that was evident right then, anyway... Strongly suspect that it WAS the death-stroke for the tranny, though, since it was only a couple months later that the thing went completely tango-uniform) but by all rights, that transmission should have gone off like a bomb... Manual or automatic, they just aren't made for being punched into reverse at 70+! -- Don Bruder - - New Email policy in effect as of Feb. 21, 2004. Short form: I'm trashing EVERY E-mail that doesn't contain a password in the subject unless it comes from a "whitelisted" (pre-approved by me) address. See <http://www.sonic.net/~dakidd/main/contact.html> for full details. |
#5
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> wrote in message ups.com... > Trying to understand more about manual's, and came across this > excellent article: > > http://auto.howstuffworks.com/transmission5.htm > > However, here's the part I don't get: What is preventing the driver > from shifting into reverse while going 60 miles an hour? > > >From the colored diagram.... Please correct me if I have this wrong: > The purple collars are always spinning when the car is moving. The > blue, red, and green STOP spinning when the clutch is in neutral and > the clutch is pushed in, or at least, spinning slowly from the friction > of the output shaft (yellow) rubbing on the bearings that the blue > gears ride on. > > TIA! > Nothing. Just like most transmissions you can shift into reverse from a forward gear. If your REALLY lucky the only thing that happens is that the rear tires lock up and the engine quits and you slide to a stop. If your unlucky, the trans will go into gear and then grenade the weakest part in the driveline. What that part is depends on the vehicle. Anything from U-Joints to the clutch disc or even the crankshaft in the engine. Something will give. -- Steve Williams ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
#6
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Some cars used to have a reverse lockout which helped to prevent disaster
when overvigorously shifting. It isnt likely you would get it completely into reverse while moving forward, but even to snag a little bit of the gear could, would, cause splinters to fly. |
#7
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#8
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> > However, here's the part I don't get: What is preventing the driver > from shifting into reverse while going 60 miles an hour? A greyish organ with lots of lumps and folds, located between the driver's ears. |
#9
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Steve > writes:
> > However, here's the part I don't get: What is preventing the driver > > > from shifting into reverse while going 60 miles an hour? > > A greyish organ with lots of lumps and folds, located between the > driver's ears. > > Plus a *very* pronounced grinding noise when he attempts to do it. |
#10
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"What is preventing the driver from shifting into reverse while going
60 miles an hour?" JS> Aside from the fact that it would take a real effort to grind those gears together I suspect the overriding reason would be cost. A boneyard gearbox on most cars will set you back $2k. If you can't find one a new one may exceed the value of a used car. |
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