 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Porsche / Porshe 911 / March 2004Clutch / gearbox problems
Hmm, just put the car in reverse and when I pressed the clutch pedal all the way to the floor I could hear gears meshing in a not too promising way. If the pedal is back an inch it seems OK. The gears all engage OK and there seems no other symptom. This is a 1989 911, it had a new clutch 15k miles ago and the car is generally driven conservatively. Any ideas? John Openshaw John - your '89 has a hydraulically actuated clutch. If it seems to work OK when you depress the pedal partly, but not when you depress it fully, I would take a look at the hydraulics - either the master or the slave cylinder. I'd start with bleeding it, but I'd suspect one of the components to have failed. regards, Mark Hald '77 Carrera 3.0 http://members.rennlist.com/hald > Hmm, just put the car in reverse and when I pressed the clutch pedal all > the way to the floor I could hear gears meshing in a not too promising [quoted text clipped - 5 lines] > > John Openshaw >your '89 has a hydraulically actuated clutch. If it seems to work OK when >you depress the pedal partly, but not when you depress it fully, I would >take a look at the hydraulics - either the master or the slave cylinder. I'd >start with bleeding it, but I'd suspect one of the components to have >failed. Thanks for the info - any idea why I get the grinding gears sound??? >> Hmm, just put the car in reverse and when I pressed the clutch pedal all >> the way to the floor I could hear gears meshing in a not too promising [quoted text clipped - 5 lines] >> >> John Openshaw  SignatureJohn Openshaw John - well... if the hydraulics are not fully disengaging the clutch when you press the pedal, then the gears would still be spinning and they will grind when you try to shift into or between gears. mark > >your '89 has a hydraulically actuated clutch. If it seems to work OK when > >you depress the pedal partly, but not when you depress it fully, I would [quoted text clipped - 13 lines] > >> > >> John Openshaw >John - > >well... if the hydraulics are not fully disengaging the clutch when you >press the pedal, then the gears would still be spinning and they will grind >when you try to shift into or between gears. Ah, no - I should've explained it better - its not grinding when shifting gears, its grinding when in gear. If its already in reverse (or first) and you press the clutch all the way down it grinds, a bit back and its OK. I'm concerned something is loose, though it could be badly adjusted and catching on something. I bet its the expensive version though... Cheers John >> >your '89 has a hydraulically actuated clutch. If it seems to work OK when >> >you depress the pedal partly, but not when you depress it fully, I would [quoted text clipped - 13 lines] >> >> >> >> Any ideas? SignatureJohn Openshaw AH! Sorry, I misunderstood the original symptoms, John. What you describe sounds like the clutch release [aka 'throwout'] bearing. Gears fully engaged already, you hear a grinding noise when you fully depress the clutch pedal, and the grinding goes away as you release the clutch. Is it safe to say that it also makes the noise if the transmission is in neutral and you press the clutch pedal fully? The throwout bearing is what presses against the clutch - it has a bearing inside of it so it can spin with the clutch as pressure is applied through the hydraulics to the clutch release lever. The bearing is probably going or gone, which will require removal of the transmission to gain access. The part itself shouldn't be too expensive, but the cost of removal / replacement of the engine & transmission could be fairly high, depending upon who does it. While you have it removed, there are some updates to the bearing and the release lever components which, if not already done, should be. I hope this helps. SignatureMark Hald '77 Carrera 3.0 http://members.rennlist.com/hald > >John - > > [quoted text clipped - 31 lines] > >> >> > >> >> Any ideas? >AH! > [quoted text clipped - 5 lines] >clutch. Is it safe to say that it also makes the noise if the transmission >is in neutral and you press the clutch pedal fully? You're spot-on with the diagnosis - bad news but I'd rather know what it is. >The throwout bearing is what presses against the clutch - it has a bearing >inside of it so it can spin with the clutch as pressure is applied through [quoted text clipped - 8 lines] > >I hope this helps. Yeah, it does a lot - the clutch was only replaced 15k miles ago (not by me) so I think I'll have a go at this myself. I need to sort out an oil- leak and sticking heater valves while I'm at it... John Openshaw Where are you located, John? I'm in Massachusetts. Where is the oil leak, or can't you tell? mark > >AH! > > [quoted text clipped - 27 lines] > > John Openshaw >Where are you located, John? I'm in Massachusetts. Over in South England. >Where is the oil leak, or can't you tell? Its weeping from one of the lines, thankfully not from the engine (not the last ime I looked anyway!). John SignatureJohn Openshaw That's good that it's not the engine that's leaking. I have my engine out at the moment for a transmission rebuild and to fix some leaks. We finished the transmission, yesterday, so now I'm making ready to attack the leaks. mark > >Where are you located, John? I'm in Massachusetts. > [quoted text clipped - 6 lines] > > John |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.