C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Clutch Slave

Thread Tools
 
Search this Thread
 
Old 12-20-2010, 02:22 AM
  #1  
grantar2
Burning Brakes
Thread Starter
 
grantar2's Avatar
 
Member Since: Mar 2009
Posts: 828
Received 5 Likes on 4 Posts

Default Clutch Slave

Can anyone tell me what the symptoms of a degraded or failing clutch slave are? 90 L98 with ZF 6sp.
Old 12-20-2010, 08:23 AM
  #2  
sailorsteve
Drifting
Support Corvetteforum!
 
sailorsteve's Avatar
 
Member Since: Jun 2010
Location: Westerly RI
Posts: 1,851
Received 7 Likes on 7 Posts

Default

The trans will be difficult to shift into gear, especially into reverse. You should be able to shift into reverse while stationary without grinding gears or forcing the lever. The feeling is that of a clutch that is not fully released, because that is the result of trouble in the hyd. system.
Old 12-20-2010, 08:49 AM
  #3  
lt4obsesses
Le Mans Master
 
lt4obsesses's Avatar
 
Member Since: Dec 2006
Location: H-Town Texas
Posts: 5,139
Received 481 Likes on 261 Posts

Default

also check the fluid level in the master resevoir. It is located on the driver's side just over the battery. You can also check underneath for dripping fluid from the bottom of the bell housing. If the slave is leaking, it usually does so into the bell housing and will work it's way out from the lowest point in the housing (just in front of the oil pan).

Along with the aforementioned symptoms, the clutch pedal will get progressively more spongy and will go deeper to engage.
Old 12-20-2010, 09:41 AM
  #4  
jaa1992
Le Mans Master
 
jaa1992's Avatar
 
Member Since: Mar 2001
Location: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps GA
Posts: 7,977
Received 13 Likes on 12 Posts
Cruise-In III Veteran
Cruise-In IV Veteran
St. Jude Donor '12

Default

If I don't drive it I will be out of clutch fluid in a week.
Once filled with fluid it takes a LOT of pumps to get any pedal back.
One time I even had to crack the bleeder to get fluid flowing.

Thank goodness the 2010 season is over so I can replace all that old stuff.
Old 12-20-2010, 10:35 AM
  #5  
grantar2
Burning Brakes
Thread Starter
 
grantar2's Avatar
 
Member Since: Mar 2009
Posts: 828
Received 5 Likes on 4 Posts

Default

Thanks guys.
Old 12-20-2010, 12:40 PM
  #6  
GREGGPENN
Race Director
 
GREGGPENN's Avatar
 
Member Since: Nov 2003
Location: Overland Park Kansas
Posts: 12,012
Received 394 Likes on 323 Posts
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019

Default

Originally Posted by lt4obsesses
also check the fluid level in the master resevoir.


Your slave isn't bad if you're not losing fluid.
Old 12-20-2010, 03:15 PM
  #7  
sailorsteve
Drifting
Support Corvetteforum!
 
sailorsteve's Avatar
 
Member Since: Jun 2010
Location: Westerly RI
Posts: 1,851
Received 7 Likes on 7 Posts

Default

Originally Posted by GREGGPENN


Your slave isn't bad if you're not losing fluid.
I agree with you and lt4obssesses that checking the fluid is the first thing to do, and I should have mentioned it. But, if the pushrod seal of either cyl is compromised, would you not have symptoms noted by the OP? Would you not then have internal leakage, not necessarily visible? That's how I interpreted the piece by Bill Boudreau (zfdoc) that is archived on the forum, and it seems to mirror my experience with clutch cyl problems.
Old 12-20-2010, 09:57 PM
  #8  
GREGGPENN
Race Director
 
GREGGPENN's Avatar
 
Member Since: Nov 2003
Location: Overland Park Kansas
Posts: 12,012
Received 394 Likes on 323 Posts
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019

Default

Originally Posted by sailorsteve
But, if the pushrod seal of either cyl is compromised, would you not have symptoms noted by the OP?
What symptoms noted by the OP?
Old 12-21-2010, 09:46 AM
  #9  
sailorsteve
Drifting
Support Corvetteforum!
 
sailorsteve's Avatar
 
Member Since: Jun 2010
Location: Westerly RI
Posts: 1,851
Received 7 Likes on 7 Posts

Default

Originally Posted by GREGGPENN
What symptoms noted by the OP?
I must be bumped in the head, I confused this thread with another one on the same subject when I wrote my response.

Also, after rethinking your post and my recollection of my own clutch issues (6 yrs ago), I realize that if the pushrod seal craps out, and prevents a full stroke, the fluid that leaks by has no place to go, other than to leak out.

I'm just going to have to start going to bed earlier, or something.

Get notified of new replies

To Clutch Slave




Quick Reply: Clutch Slave



All times are GMT -4. The time now is 07:24 AM.