If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
clutch can't engage without making a noise at 80mph
When driving down a hill, I usually leave my gear to neutral and let
the momentum carrying the car. I found if the speed reaches ~80mph, I won't be able re-enage the 5th gear without make a noise like it would when you do not step on clutch all the way. If I just step on clutch all the way and leavethe car slide, I can release the clutch and get back the gear without any noise. It appears there is some kind sychronization issue at high speed that it can't go to the gear smoothly. I don't have gear problem except sometimes it takes a few try to go back gear. Does this happen to you too? My car is 1994 4 cyl. Toyota Camry. |
Ads |
#2
|
|||
|
|||
clutch can't engage without making a noise at 80mph
"cpliu" > wrote in message ... > When driving down a hill, I usually leave my gear to neutral and let > the momentum carrying the car. I found if the speed reaches ~80mph, I > won't be able re-enage the 5th gear without make a noise like it would > when you do not step on clutch all the way. If I just step on clutch > all the way and leavethe car slide, I can release the clutch and get > back the gear without any noise. > > It appears there is some kind sychronization issue at high speed that > it can't go to the gear smoothly. I don't have gear problem except > sometimes it takes a few try to go back gear. > > Does this happen to you too? > > My car is 1994 4 cyl. Toyota Camry. > > > What kind of nut bar puts their vehicle in neutral going down hills? For starters, it is illegal in many jurisdictions. It's JUST. PLAIN. DUMB. |
#3
|
|||
|
|||
clutch can't engage without making a noise at 80mph
On Fri, 29 May 2009 22:20:42 GMT, "Sharx35" >
wrote: > >"cpliu" > wrote in message ... >> When driving down a hill, I usually leave my gear to neutral and let >> the momentum carrying the car. I found if the speed reaches ~80mph, I >> won't be able re-enage the 5th gear without make a noise like it would >> when you do not step on clutch all the way. If I just step on clutch >> all the way and leavethe car slide, I can release the clutch and get >> back the gear without any noise. >> >> It appears there is some kind sychronization issue at high speed that >> it can't go to the gear smoothly. I don't have gear problem except >> sometimes it takes a few try to go back gear. >> >> Does this happen to you too? >> >> My car is 1994 4 cyl. Toyota Camry. >> >> >> > >What kind of nut bar puts their vehicle in neutral going down hills? For >starters, it is illegal in many jurisdictions. It's JUST. PLAIN. DUMB. Camry owner. --Vic |
#4
|
|||
|
|||
clutch can't engage without making a noise at 80mph
"Vic Smith" > wrote in message news > On Fri, 29 May 2009 22:20:42 GMT, "Sharx35" > > wrote: > >> >>"cpliu" > wrote in message ... >>> When driving down a hill, I usually leave my gear to neutral and let >>> the momentum carrying the car. I found if the speed reaches ~80mph, I >>> won't be able re-enage the 5th gear without make a noise like it would >>> when you do not step on clutch all the way. If I just step on clutch >>> all the way and leavethe car slide, I can release the clutch and get >>> back the gear without any noise. >>> >>> It appears there is some kind sychronization issue at high speed that >>> it can't go to the gear smoothly. I don't have gear problem except >>> sometimes it takes a few try to go back gear. >>> >>> Does this happen to you too? >>> >>> My car is 1994 4 cyl. Toyota Camry. >>> >>> >>> >> >>What kind of nut bar puts their vehicle in neutral going down hills? For >>starters, it is illegal in many jurisdictions. It's JUST. PLAIN. DUMB. > > Camry owner. > > --Vic This is a Toyota newsgroup--haul your ricer ass back to the Honda groups. |
#5
|
|||
|
|||
clutch can't engage without making a noise at 80mph
"cpliu" wrote > When driving down a hill, I usually leave my gear to neutral and let > the momentum carrying the car. I found if the speed reaches ~80mph, I > won't be able re-enage the 5th gear without make a noise like it would > when you do not step on clutch all the way. If I just step on clutch > all the way and leavethe car slide, I can release the clutch and get > back the gear without any noise. Simply (and not very technically) put, the transmission has 2 "sets" of gears. One set spins at the same speed as the engine (via the clutch), the other set spins with the differential, which is connected to the wheels. When you're flying down the hill, the gears connected to the wheels are spinning away in there, fast enough to make a milkshake, while the gears connected to the clutch are (relatively speaking) standing still. Trying to ram the gears together when they're spinning at such different speeds will cause "gear clash", as the spring-loaded synchronizers that help the gears to mesh smoothly just can't keep up. If you insist on driving like this, you'll have to learn to partially "double-clutch". This is when the car is already moving, and the transmission is in neutral (or the synchros are worn out). You rev the engine to match the speed that it "should" be at in a particular gear, then (since both sets of gears are now turning at more-or-less the proper speed), you quickly push the clutch pedal down and shift into the correct gear before the engine-side gears have a chance to slow down. This usually must be done within 1/4 second or so, or you'll grind the gears. -- Side-note: With a LOT of practice, it's possible to drive without using the clutch at all (except for starting off from a light). It happened to me years ago when my VW clutch cable broke. At the light, engine off, in 1st gear, light changes, turn the key, chugchugchugchug and I'm driving down the road in 1st gear. Get the revs up to where I would normally shift, let off the gas just a bit so I can pop the shifter into neutral, wait for the engine to slow to the "normal" speed for shifting, and gently slide the lever into 2nd. Rev, pop, wait, slide into 3rd. Same for 4th. To shift down, let the car slow, neutral, rev, gently into 3rd. A bit harder to shift down, but possible. Drove for about 3 miles that way (in city traffic) to the dealer where I bought a new cable, then to a garage for a big glob of grease, then another 5 miles home, where I changed the cable. |
#6
|
|||
|
|||
clutch can't engage without making a noise at 80mph
"cpliu" wrote: (1994 4 cyl. Toyota Camry)
When I go downhill, I put my transmission in neutral. If I try to re-engage it, fifth gear will grind when I am going over 80 mph. There seems to be some kind of synchronization issue. __________________________________________________ _________ Options: 1.) When you want to re-engage, step on the gas until the engine revs are at the rpm corresponding to 80 mph in fifth gear. Then pull it into (only) fifth gear. You won't even need the clutch. 2.) Don't try to re-engage the gears - just let the fun continue. 3.) Option deleted as judgmental. Good luck. Rodan. |
#7
|
|||
|
|||
clutch can't engage without making a noise at 80mph
cpliu wrote:
> When driving down a hill, I usually leave my gear to neutral and let > the momentum carrying the car. I found if the speed reaches ~80mph, I > won't be able re-enage the 5th gear without make a noise like it would > when you do not step on clutch all the way. If I just step on clutch > all the way and leavethe car slide, I can release the clutch and get > back the gear without any noise. > > It appears there is some kind sychronization issue at high speed that > it can't go to the gear smoothly. I don't have gear problem except > sometimes it takes a few try to go back gear. > > Does this happen to you too? > > My car is 1994 4 cyl. Toyota Camry. > Aside from the fact that coasting in neutral is kinda dumb.... You're really over-stressing the 5th gear synchronizer trying to get it to bring the idling clutch plate back up to high RPM to engage the gear. 4th and 5th gear synchros are less beefy than lower gear synchros and just are not made to take that kind of abuse. |
#8
|
|||
|
|||
clutch can't engage without making a noise at 80mph
Steve wrote:
> cpliu wrote: >> When driving down a hill, I usually leave my gear to neutral and let >> the momentum carrying the car. I found if the speed reaches ~80mph, I >> won't be able re-enage the 5th gear without make a noise like it would >> when you do not step on clutch all the way. If I just step on clutch >> all the way and leavethe car slide, I can release the clutch and get >> back the gear without any noise. >> >> It appears there is some kind sychronization issue at high speed that >> it can't go to the gear smoothly. I don't have gear problem except >> sometimes it takes a few try to go back gear. >> >> Does this happen to you too? >> >> My car is 1994 4 cyl. Toyota Camry. >> > > Aside from the fact that coasting in neutral is kinda dumb.... > > You're really over-stressing the 5th gear synchronizer trying to get it > to bring the idling clutch plate back up to high RPM to engage the gear. > 4th and 5th gear synchros are less beefy than lower gear synchros and > just are not made to take that kind of abuse. Not just dumb but ILLEGAL in every state. It falls under the section of DMV laws about having control of the vehicle. The stress on the syncros is NOTHING compared to the stress on that clutch plate as it tries to deal with the centrifugal force on it. That plate is NOT designed to handle that without being clamped between the pressure plate and flywheel. Wait until that plate explosively fails. It makes a LOT of noise and tosses part all over!! -- Steve W. |
#9
|
|||
|
|||
clutch can't engage without making a noise at 80mph
Steve W. wrote:
> Steve wrote: >> cpliu wrote: >>> When driving down a hill, I usually leave my gear to neutral and let >>> the momentum carrying the car. I found if the speed reaches ~80mph, I >>> won't be able re-enage the 5th gear without make a noise like it would >>> when you do not step on clutch all the way. If I just step on clutch >>> all the way and leavethe car slide, I can release the clutch and get >>> back the gear without any noise. >>> >>> It appears there is some kind sychronization issue at high speed that >>> it can't go to the gear smoothly. I don't have gear problem except >>> sometimes it takes a few try to go back gear. >>> >>> Does this happen to you too? >>> >>> My car is 1994 4 cyl. Toyota Camry. >>> >> Aside from the fact that coasting in neutral is kinda dumb.... >> >> You're really over-stressing the 5th gear synchronizer trying to get it >> to bring the idling clutch plate back up to high RPM to engage the gear. >> 4th and 5th gear synchros are less beefy than lower gear synchros and >> just are not made to take that kind of abuse. > > Not just dumb but ILLEGAL in every state. It falls under the section of > DMV laws about having control of the vehicle. > > The stress on the syncros is NOTHING compared to the stress on that > clutch plate as it tries to deal with the centrifugal force on it. That > plate is NOT designed to handle that without being clamped between the > pressure plate and flywheel. > > Wait until that plate explosively fails. It makes a LOT of noise and > tosses part all over!! > no worse than shifting at 6500 RPM... Now clutches *do* explode but usually under ultra-high-RPM racing conditions... That said, to the OP - if you are serious, knock it the heck off. if nothing else you aren't saving any fuel unless you're driving a real old car (most modern cars disable the fuel injectors completely if the car is in gear with the throttle closed and the engine is turning over a certain RPM threshold) and as others have posted, it's possibly unsafe and definitely illegal. just leave it in gear and control your speed with throttle and brake and/or downshifting if necessary nate -- replace "roosters" with "cox" to reply. http://members.cox.net/njnagel |
#10
|
|||
|
|||
clutch can't engage without making a noise at 80mph
Nate Nagel wrote:
> Steve W. wrote: >> Steve wrote: >>> cpliu wrote: >>>> When driving down a hill, I usually leave my gear to neutral and let >>>> the momentum carrying the car. I found if the speed reaches ~80mph, I >>>> won't be able re-enage the 5th gear without make a noise like it would >>>> when you do not step on clutch all the way. If I just step on clutch >>>> all the way and leavethe car slide, I can release the clutch and get >>>> back the gear without any noise. >>>> >>>> It appears there is some kind sychronization issue at high speed that >>>> it can't go to the gear smoothly. I don't have gear problem except >>>> sometimes it takes a few try to go back gear. >>>> >>>> Does this happen to you too? >>>> >>>> My car is 1994 4 cyl. Toyota Camry. >>>> >>> Aside from the fact that coasting in neutral is kinda dumb.... >>> >>> You're really over-stressing the 5th gear synchronizer trying to get it >>> to bring the idling clutch plate back up to high RPM to engage the gear. >>> 4th and 5th gear synchros are less beefy than lower gear synchros and >>> just are not made to take that kind of abuse. >> >> Not just dumb but ILLEGAL in every state. It falls under the section of >> DMV laws about having control of the vehicle. >> >> The stress on the syncros is NOTHING compared to the stress on that >> clutch plate as it tries to deal with the centrifugal force on it. That >> plate is NOT designed to handle that without being clamped between the >> pressure plate and flywheel. >> >> Wait until that plate explosively fails. It makes a LOT of noise and >> tosses part all over!! >> > > no worse than shifting at 6500 RPM... Now clutches *do* explode but > usually under ultra-high-RPM racing conditions... You honestly think that a 94 FACTORY Toyota Camry clutch is going to handle 6500 rpm? Also in shifting you don't just spin the clutch up from a standing start the way the OP is. AND you certainly don't miss the shift a few times as was stated. > > That said, to the OP - if you are serious, knock it the heck off. if > nothing else you aren't saving any fuel unless you're driving a real old > car (most modern cars disable the fuel injectors completely if the car > is in gear with the throttle closed and the engine is turning over a > certain RPM threshold) and as others have posted, it's possibly unsafe > and definitely illegal. just leave it in gear and control your speed > with throttle and brake and/or downshifting if necessary > > nate > -- Steve W. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
car making noise | Jimmy[_2_] | Honda | 1 | June 20th 07 03:27 PM |
Red momo making odd noise? | pugpep | Simulators | 7 | December 14th 06 02:49 AM |
97 civic clutch won't engage | scooter1 | Honda | 3 | December 28th 05 01:17 PM |
help with clutch making a squeaking noise | R | Ford Mustang | 3 | August 31st 05 04:15 AM |
97 SL2 loocks keep making noise | maxsaturn | Saturn | 0 | February 17th 05 05:23 AM |