Clutch Release
Printed From: West Coast Fieros
Category: Technical Topics Forum
Forum Name: Technical Questions and Discussions
Forum Description: Got a technical question about your fiero? ask it here.
URL: http://www.westcoastfieros.com/forum/forum_posts.asp?TID=943
Printed Date: 24 November 2024 at 1:25am Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: Clutch Release
Posted By: Bassman
Subject: Clutch Release
Date Posted: 25 October 2008 at 12:02am
Hi all,
I was trying to assist Ryan with his clutch with the little knowledge I have, we have looked on Pennocks and cannot seem to find any details on how one can check their clutch release, or what are the systems and fixes if any.
Thanks All
------------- Brian (Bassman)
86 GT Fastback 3.2L
2013 Mazda3 Sport GS SkyActive
[IMG]http://i170.photobucket.com/albums/u243/Bassman68/BassmanSignature.png">
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Replies:
Posted By: Patrick
Date Posted: 25 October 2008 at 12:33am
Brian, is the problem with Ryan's clutch that it doesn't disengage properly. If so, that topic has been covered a gazillion times at PFF because it's such a common problem. It's that gol-darn poorly designed hydraulic system the Fiero has.
The clutch on my first Fiero was a nightmare. I was constantly "bleeding" it. http://www.fiero.nl/forum/Archives/Archive-000001/HTML/20010706-2-000034.html - Here is an infamous thread at PFF from more than nine years ago where I and a lot of others thrashed around a few ideas.
Put on a pot of coffee and start reading.
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Posted By: Bassman
Date Posted: 25 October 2008 at 1:01am
Thanks on behalf of Ryan:), see man, I told you if posted Cpt, Craker or Patrick would reply...I did explain that our clutches are a headache being hydraulic...why is it that someone has not made an aftermarket clutch, so many other parts are for our cars...lol.
His main issue is it grinds into third and downshiftng into second and third.
I see your up late also...time for some late night gaming with my friends in the UK and Australia...lol
------------- Brian (Bassman)
86 GT Fastback 3.2L
2013 Mazda3 Sport GS SkyActive
[IMG]http://i170.photobucket.com/albums/u243/Bassman68/BassmanSignature.png">
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Posted By: Patrick
Date Posted: 25 October 2008 at 1:25am
Bassman wrote:
I did explain that our clutches are a headache being hydraulic...
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It's not so much the system being hydraulic that causes the problem. Lots of makes of cars have hydraulic clutches which work problem-free. Heck, even my lowly '94 Hyundai Elantra has a hydraulic clutch that has never had a hydraulic problem in the 3 1/2 years I've owned it. I've never bled it even once! Never a problem with disengaging the clutch.
My experience is that it's the design of the slave cylinder which is the weak link in the Fiero's hydraulic system. It can allow air into the system without showing any sign of fluid leakage. It's sneaky. I hate it.
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Posted By: Bassman
Date Posted: 25 October 2008 at 1:28am
So true...Craker helped flush my system a year ago and rebuilt both master and slave, this year had to replace the slave...cheap thank god to replace:)...happy my GA GT is auto...lol
------------- Brian (Bassman)
86 GT Fastback 3.2L
2013 Mazda3 Sport GS SkyActive
[IMG]http://i170.photobucket.com/albums/u243/Bassman68/BassmanSignature.png">
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Posted By: Patrick
Date Posted: 25 October 2008 at 1:53am
Bassman wrote:
His main issue is it grinds into third and downshiftng into second and third.
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If it's NOT grinding into first and/or reverse as well (with the engine running), I suspect it might be more of an adjustment problem with the shifter cables.
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Posted By: Capt Fiero
Date Posted: 25 October 2008 at 10:00am
OK a little history on Ryan's car.
First owner was I think Mike and Tina back in 99/00 Mike drove the poop out of the car. The next Owner was Scott he again drove the car rather hard, but was not really a Fiero guy, so he got rid of it. The car got traded in at a dealership.
Ron P bought it from the dealership, did a full cosmetic restoration to the car, but I don't think he really did much in the mechanical side of it. Ron then sold it to Smurf. Smurf again drove it rather hard. Did the engine rebuild and may or may not have changed the trans axle. Stories seem to be mixed. I was told it was changed to an Isuzu 5sd however, when Ryan brought the car to me, I looked and it was a Getrag not an Isuzu that was in the car.
3 are 3 options to this mess.
A. Its the original Trans and it simple has a pooched 3rd gear.
B. It is a used one, with a bad Synchro (I know the easterbrooks had a used Getrag about the same time as Smurf owned it, and it had a pooched 3rd gear Synchro)
C. And this is a long shot, someone put either Motor Oil or ATF in the trans and it should have Synchro Mesh.
Because I don't know what parts have been installed I can't really say for sure. However some of the cheaper clutch kits will have the fingers on the pressure plate fail before the clutch does. You can have FULL movement of the slave, and it will still grind. Because the slave moves the clutch fork, which moves the throwout bearing which is suppose to push on the fingers of the pressure plate to release the clutch. If those fingers are made from cheap, soft metal, the fingers will flex and the car simply won't shift because the clutch is not fully disengaging. When I had my Centerforce clutch in my 4.9 5spd car, I only had to push it maybe 1/2 to the floor to get full disengagement. A Dynopack clutch which will be perfect when installed, may start to get hard to shift after only a year of driving due to the pressure plate issue.
If you have done a gravity bleed on it and it is still acting up, I would change the fluid, and try again. If it is still grinding I would start looking for a replacement trans axle. While the trans out, I would install a better clutch.
Ryan if you are reading this, you need to get in touch with either Smurf or Blair and try to find out what the real story is on the Trans axle.
I have driven Ryan's car, and to be very honest, I don't think there is a hydraulic issue. Getting a perfect bleed on it will help the problem, but it won't solve the underlying issue of a bad 3rd gear Synchro. Where is Devers when you need him? (Devers is a club member that specializes in rebuilding trans axles including the getrags.)
------------- Capt Fiero
88 Fiero GT 5spd V6
Eight Fifty Seven GT V8 5spd.
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Posted By: Bassman
Date Posted: 25 October 2008 at 11:38am
Ok Dave, what's the history on my car...lol, OMG:).
------------- Brian (Bassman)
86 GT Fastback 3.2L
2013 Mazda3 Sport GS SkyActive
[IMG]http://i170.photobucket.com/albums/u243/Bassman68/BassmanSignature.png">
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Posted By: Patrick
Date Posted: 25 October 2008 at 11:45am
Capt Fiero wrote:
I have driven Ryan's car, and to be very honest, I don't think there is a hydraulic issue.
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Yeah, that's why I asked if it was grinding while going into first and/or reverse (with the engine running). If it's a hydraulic problem and the clutch isn't disengaging properly, it'll grind for sure at this time (although it should still be able to go into first and/or reverse just fine with the engine not running).
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Posted By: Bassman
Date Posted: 25 October 2008 at 11:52am
He can just bypass 3rd...lol. I know of a guy from autoX that works at a trans shop in Abby, Ryan let me know and I can get in touch with him for you...he know's our cars as he has raced mainly Austin's as a co-driver.
------------- Brian (Bassman)
86 GT Fastback 3.2L
2013 Mazda3 Sport GS SkyActive
[IMG]http://i170.photobucket.com/albums/u243/Bassman68/BassmanSignature.png">
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Posted By: Patrick
Date Posted: 25 October 2008 at 12:09pm
Bassman wrote:
His main issue is it grinds into third and downshiftng into second and third.
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Capt Fiero wrote:
3 options to this mess.
A. Its the original Trans and it simple has a pooched 3rd gear.
B. It is a used one, with a bad Synchro (I know the easterbrooks had a used Getrag about the same time as Smurf owned it, and it had a pooched 3rd gear Synchro)
C. And this is a long shot, someone put either Motor Oil or ATF in the trans and it should have Synchro Mesh.
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If it's grinding downshifting into second gear as well, it would appear there's more to this problem than just a "pooched" third gear synchro, although a worn out third gear synchro could possibly explain the problem with third gear itself grinding.
I think Ryan should:
1) Make sure the correct fluid is in the tranny. GM Synchromesh (as David suggested) is probably the best, although there are some others made by other companies which are supposed to be equivalent.
2) Make sure the linkages (shifter cables) are adjusted properly. It's also possible they stretch/wear beyond being usable. (And with what David mentioned about the tranny possibly being changed, make sure it's the correct cables being used, although I don't know for sure if they differ between the Getrag and the Isuzu.)
3) If first and/or reverse grind (with the engine running), properly bleed the hydraulics. If these gears don't grind, don't bother.
Obviously if there is an internal problem, none of this will help. However, it's certainly worthwhile trying before ripping the tranny out.
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Posted By: Bassman
Date Posted: 25 October 2008 at 12:47pm
Where's Ryan in all this...lol. I am a firm believer of GM Synchomesh, I tried thr Royal Purple one time and changed back after one week, ask Dave, my car shifts like butter:), and I change it every year
------------- Brian (Bassman)
86 GT Fastback 3.2L
2013 Mazda3 Sport GS SkyActive
[IMG]http://i170.photobucket.com/albums/u243/Bassman68/BassmanSignature.png">
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Posted By: Patrick
Date Posted: 25 October 2008 at 12:54pm
Posted By: Bassman
Date Posted: 25 October 2008 at 1:45pm
http://www.dsmtalk.com/forums/showthread.php?t=125883&page=1 - http://www.dsmtalk.com/forums/showthread.php?t=125883&pa ge=1
------------- Brian (Bassman)
86 GT Fastback 3.2L
2013 Mazda3 Sport GS SkyActive
[IMG]http://i170.photobucket.com/albums/u243/Bassman68/BassmanSignature.png">
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Posted By: Matt
Date Posted: 25 October 2008 at 5:15pm
Bassman wrote:
Where's Ryan in all this...lol. I am a firm believer of GM Synchomesh, I tried thr Royal Purple one time and changed back after one week, ask Dave, my car shifts like butter:), and I change it every year |
Have any tips for removing the old fluid from a Isuzu 5spd? The drain plug is different than the 4spd. Where is a good place to find "GM Syncromesh"?
------------- I wanna go fast.
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Posted By: Capt Fiero
Date Posted: 25 October 2008 at 6:00pm
Matt wrote:
Bassman wrote:
Where's Ryan in all this...lol. I am a firm believer of GM Synchomesh, I tried thr Royal Purple one time and changed back after one week, ask Dave, my car shifts like butter:), and I change it every year | Have any tips for removing the old fluid from a Isuzu 5spd? The drain plug is different than the 4spd. Where is a good place to find "GM Syncromesh"? |
Yep BIG Boxed End Wrench, or some really good quality crescent wrench's. There was no way to get a socket on my Isuzu as it is sideways in the case rather than straight down like on the 4spds. Part of my problem was my V8 was hooked to the Isuzu and I kept twisting the trans brackets which reduced the area to get wrench's into between the trans case and the cradle.
------------- Capt Fiero
88 Fiero GT 5spd V6
Eight Fifty Seven GT V8 5spd.
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Posted By: Bassman
Date Posted: 25 October 2008 at 6:01pm
LORDCO carries the oil, make sure you get the club discount, and always buy at least 1lt more for back up/touch ups...I would help you but I am a handycap...lol
------------- Brian (Bassman)
86 GT Fastback 3.2L
2013 Mazda3 Sport GS SkyActive
[IMG]http://i170.photobucket.com/albums/u243/Bassman68/BassmanSignature.png">
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Posted By: Matt
Date Posted: 25 October 2008 at 6:27pm
I can get to the side plug. My only concern was getting all the fluid out as I don't have a pump. Could I just drain it to the plug level and then run some extra Syncromesh through to flush it?
------------- I wanna go fast.
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Posted By: 88FormulaFiero
Date Posted: 25 October 2008 at 7:28pm
Wow, I dont look at the forum for a little bit and all this is posted, Thanks guys!!!
little more info, the problem at the moment is it grinds shifting up into third, and downshifting into second and third. the downshifting problems are worst when the car has just been started.
Other things, when shifting into reverse I have to go into fifth first and then into reverse to prevent it from grinding, would this be caused by stretched shift cables?
also while reading on pennocks I saw that the clutch pedal is supposed to be 1" above the brake pedal (I also saw statements saying this inst true , though most referred to 88s) my pedal sits slightly below the brake pedal
one other odd thing is that to get "full" clutch disengagement I need to put the pedal all the way to the floor, there is a bit of a zone there where the car wont move but there is more resistance getting into gear.
final note, what I was looking for on pennocks was some way to check to see if the clutch was properly disengaging but I couldn't find anything, Is there a way to check or just bleed it and see if it improves.
I'll be reading that link Patrick put up, looks like it'll take me a while though...
Forgot to add, the tranny fluid looked like synchromesh, i'm not sure if its the GM stuff but it looked like what I put into the GT earlier (that was synchromesh but not the GM version, I couldnt find it anywhere).
Thanks again,
Ryan
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Posted By: Dr.Fiero
Date Posted: 25 October 2008 at 9:47pm
88FormulaFiero wrote:
my pedal sits slightly below the brake pedal
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Ok, no question about it then - you have a bent pedal, no ifs and or buts about it.
Get a new pedal from The Fiero Store before you go bashing your head against (anything). That one thing has solved more clutch issues for me (especially on Getrags!) than I can count.
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Posted By: Bassman
Date Posted: 25 October 2008 at 10:11pm
Ryan, I have a brand new one I bought from there...it's not the right one, I needed the 1st gen...PM and let me know.
------------- Brian (Bassman)
86 GT Fastback 3.2L
2013 Mazda3 Sport GS SkyActive
[IMG]http://i170.photobucket.com/albums/u243/Bassman68/BassmanSignature.png">
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Posted By: Patrick
Date Posted: 26 October 2008 at 10:11am
Dr.Fiero wrote:
Ok, no question about it then - you have a bent pedal, no ifs and or buts about it.
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So John, do you think Ryan's pedal might be bent?
Yes, a bent pedal could certainly be contributing to Ryan’s problem, but seeing as how his first gear isn’t difficult to get into (not that we’ve been made aware of anyway), I’d be surprised if there weren’t still other issues.
Ryan, just so you know, there’s two types of pedals made of different metals. Aluminum ones which have a tendency to bend, and steel ones which seldom bend. Obviously you’ll want to replace your pedal if it’s bent with a steel one. A quick way to distinguish the two is with a magnet. It'll stick to a steel one and yep, not stick to an aluminum one.
88FormulaFiero wrote:
...when shifting into reverse I have to go into fifth first and then into reverse to prevent it from grinding, would this be caused by stretched shift cables?
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Have you tried adjusting the linkages yet?
Don't worry about whether the cables are "stretched" until you've eliminated some other variables.
It would tell us a lot if you could mention what gears (if any) are difficult to get into when the engine is NOT running.
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Posted By: 88FormulaFiero
Date Posted: 26 October 2008 at 1:07pm
I havent tried adjusting the linkages yet, i'll look that up and try doing it on tues. I'm not sure which gears are hard to get into when the engine is not running, I dont remember any being particularily hard but I havent tried that in a bit. I'll check tonight when I go back home (I dont have my car with me).
Edit to add that it runs though the gears very easily while the engine is off, almost no effort required. Deffinitly easier than with the engine running
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Posted By: Patrick
Date Posted: 27 October 2008 at 1:40am
88FormulaFiero wrote:
Edit to add that it runs though the gears very easily while the engine is off, almost no effort required. Deffinitly easier than with the engine running
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I'm no expert, so listen to what everyone else says as well , but that suggests to me that it's more of a clutch issue than a tranny problem.
It's not disengaging properly. Whether it's the pedal or the hydraulics or both or neither is yet to be determined.
However, I'd say the cables/linkage adjustment are probably fine.
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Posted By: 88FormulaFiero
Date Posted: 02 November 2008 at 2:15pm
Update on my transmission issue, both good news and bad.
The good news is I got the new clutch pedal installed and now it sits above the brake pedal like its supposed to, I've also noticed the clutch engages much closer to the top of the clutch travel, it also seems easier to run it though the gears.
The bad news is that it still buzzes into third and down into both second and third.
any checks you guys can think of to see if my clutch hydraulics are working properly?
If they are then i guess its a transmission issue.
Thanks,
Ryan
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Posted By: Patrick
Date Posted: 02 November 2008 at 3:02pm
Ryan, bring your car to the meeting this Saturday and let a few of us try driving it. Seriously. That'll give us a lot more to go on.
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Posted By: 88FormulaFiero
Date Posted: 02 November 2008 at 3:47pm
ok, it'll be there. Capt thinks its the transmission and he's probably right, i've been trying to rule out the other possibilities though, before doing anything durastic.
Thanks again for all the comments and suggestions, they've been really helpfull
Ryan
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Posted By: Capt Fiero
Date Posted: 02 November 2008 at 8:24pm
We can take another look while you are at the meeting, just make sure to bring a flashlight as it will be way past dark even at 6:30 before we go inside for the meeting.
------------- Capt Fiero
88 Fiero GT 5spd V6
Eight Fifty Seven GT V8 5spd.
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