C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Clutch disengaging question

Thread Tools
 
Search this Thread
 
Old Dec 28, 2007 | 06:52 PM
  #1  
RaleighSS's Avatar
RaleighSS
Thread Starter
Drifting
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jun 2005
Posts: 1,681
Likes: 2
From: Seven Devils NC
Default Clutch disengaging question

How do you know the clutch is fully disengaging? I have installed a new ram clutch, Ram adjustable Master Along with a new Trans :-)

It shifts fine at Low RPM shifts now during the break in period... but read all about "properly adjusted master" How do i Know when it is properly adjusted????? Trans builder told me last trans syncros were shot because he thinks the clutch was not properly disengaging at High RPM shifts ....

I herd of this trick but would like other opinions...
Trans Warm
In Neutral
Motor at 2K 2.5K RPM
Push clutch in rapidly and push shifter in to Reverse...
If properly adjusted it should go right into reverse IF not adjusted it will take a few seconds for it to go into reverse...

Just need to know how to "Know" its properly adjusted
Reply
Old Dec 28, 2007 | 10:07 PM
  #2  
veppe's Avatar
veppe
Intermediate
 
Joined: Dec 2007
Posts: 35
Likes: 0
From: San Diego CA
Default

Originally Posted by RaleighSS
How do you know the clutch is fully disengaging? I have installed a new ram clutch, Ram adjustable Master Along with a new Trans :-)

It shifts fine at Low RPM shifts now during the break in period... but read all about "properly adjusted master" How do i Know when it is properly adjusted????? Trans builder told me last trans syncros were shot because he thinks the clutch was not properly disengaging at High RPM shifts ....

I herd of this trick but would like other opinions...
Trans Warm
In Neutral
Motor at 2K 2.5K RPM
Push clutch in rapidly and push shifter in to Reverse...
If properly adjusted it should go right into reverse IF not adjusted it will take a few seconds for it to go into reverse...

Just need to know how to "Know" its properly adjusted
Note that when you push clutch, the main axle of trans still continues rotating for a while (and I guess if you have good bearings and good oil, it will rotate longer) so it could depend also on transmission condition how easy it is to shift to Reverse. You can see this "effect" if you push clutch, then first shift to e.g. 4th (=> easy to shift because not so big difference in rotating speed and main axle stops rotating) and then shift to reverse. Most often you can faster shift to reverse if you first shift to some other gear and then reverse, instead of just shifting reverse. This is based on my experience with other manual transmissions, from Corvette's trans I don't know enough to be sure
Reply
Old Dec 28, 2007 | 10:44 PM
  #3  
RaleighSS's Avatar
RaleighSS
Thread Starter
Drifting
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jun 2005
Posts: 1,681
Likes: 2
From: Seven Devils NC
Default ok

ok another data point ... tonight

Trans Warm
Neutral
Idle and up
Push in clutch Push into first quickly and car will move forward ....

So not sure if this is normal... or i need to work on clutch more
Reply
Old Dec 29, 2007 | 12:11 AM
  #4  
ZeeOSix's Avatar
ZeeOSix
Le Mans Master
20 Year Member
 
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Default

Originally Posted by RaleighSS
ok another data point ... tonight

Trans Warm
Neutral
Idle and up
Push in clutch Push into first quickly and car will move forward ....

So not sure if this is normal... or i need to work on clutch more
You are probably feeling the car move slightly due to the spinning inertial of all the parts behind the clutch. Even though the clutch is disengaged, the parts that where downstream of the clutch are still turning for a little while, so if you jam it into 1st gear instantly after disengaging the clutch you might feel a slight jolt.

If your clutch wasn't disengaging all the way, it would jolt (and maybe move even more) going into 1st gear no matter how long the clutch pedal was down.
Reply
Old Dec 29, 2007 | 07:46 AM
  #5  
RaleighSS's Avatar
RaleighSS
Thread Starter
Drifting
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jun 2005
Posts: 1,681
Likes: 2
From: Seven Devils NC
Default yup

Originally Posted by ZeeOSix
You are probably feeling the car move slightly due to the spinning inertial of all the parts behind the clutch. Even though the clutch is disengaged, the parts that where downstream of the clutch are still turning for a little while, so if you jam it into 1st gear instantly after disengaging the clutch you might feel a slight jolt.

If your clutch wasn't disengaging all the way, it would jolt (and maybe move even more) going into 1st gear no matter how long the clutch pedal was down.
Great Point..... Makes 100% sense ......

Now just looking for someone to chime in saying how to ensure its adjusted properly...
Reply
Old Dec 29, 2007 | 09:17 PM
  #6  
RaleighSS's Avatar
RaleighSS
Thread Starter
Drifting
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jun 2005
Posts: 1,681
Likes: 2
From: Seven Devils NC
Default :)

any other thoughts?
Reply
Old Dec 29, 2007 | 11:12 PM
  #7  
ZeeOSix's Avatar
ZeeOSix
Le Mans Master
20 Year Member
 
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Default

As far as making sure your clutch is adjusted correctly, I'd start by making sure there was about 1/4 inch of free play at the pedal. Did the new system come with any instructions on how to adjust properly?
Reply
Old Dec 29, 2007 | 11:35 PM
  #8  
RaleighSS's Avatar
RaleighSS
Thread Starter
Drifting
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jun 2005
Posts: 1,681
Likes: 2
From: Seven Devils NC
Default nope

Originally Posted by ZeeOSix
As far as making sure your clutch is adjusted correctly, I'd start by making sure there was about 1/4 inch of free play at the pedal. Did the new system come with any instructions on how to adjust properly?
I do not have any free play at the end... If you move the clutch the rod is moving just as much...
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-1

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-2

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-3

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-4

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-5

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-6

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-7

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-8

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-9

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
Old Dec 29, 2007 | 11:42 PM
  #9  
ZeeOSix's Avatar
ZeeOSix
Le Mans Master
20 Year Member
 
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Default

Originally Posted by RaleighSS
I do not have any free play at the end... If you move the clutch the rod is moving just as much...
The free play on a hydraulic clutch system is sometimes tricky to determine IMO. Open the door and get down and depress the clutch pedal with your hand. Slowly depress the pedal, and try and feel when the resistance starts to change. Using your hand makes it easier to determine.

I believe the free play between the clutch pedal push rod and the hydraulic plunger on the master cylinder is what really determines the pedal free play. Not sure what the GM manual says on how to adjust it .. would have to dig it out and look.
Reply
Old Dec 30, 2007 | 12:05 AM
  #10  
ZeeOSix's Avatar
ZeeOSix
Le Mans Master
20 Year Member
 
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Default

I blew the dust of the manual and looked for the clutch pedal free play adjustment. They don't really address it specifically, but they do talk about a "Clutch Pressure Plate Adjustment", which I'm thinking is what ultimately gives the system some slight free play.

If you have an aftermarket pressure plate, not sure how they address this adjustment.
Reply
Old Dec 30, 2007 | 03:07 AM
  #11  
veppe's Avatar
veppe
Intermediate
 
Joined: Dec 2007
Posts: 35
Likes: 0
From: San Diego CA
Default

I don't know any details how much you should have free play, but basically if you don't have free play at all, then the clutch might even slide, but if you have too much free play, then you might have problem that it doesn't disengage enough. So, if you currently don't have any free play, then you shouldn't have any disengaging problems And it should be very easy to see if clutch is sliding even a little if you push gas in 5th or 6th gear in relatively low speeds
Reply
Old Jan 10, 2008 | 02:06 PM
  #12  
RaleighSS's Avatar
RaleighSS
Thread Starter
Drifting
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jun 2005
Posts: 1,681
Likes: 2
From: Seven Devils NC
Default Free Play

Well when i push the peddle its never eases up.... it is the same tension all the way down I was kinda hopeing for the compound bow feel... tight tight pull then easy at then end.
Reply

Get notified of new replies

To Clutch disengaging question





All times are GMT -4. The time now is 01:36 AM.

story-0
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-1
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-2
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-3
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-4
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-5
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-6
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-7
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-8
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-9
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE