Clutch adjustment please?

EBURKETT

MEMBER
2006 CHEVROLET SILVERADO

Since new the clutch pedal must be hard against the firewall to release the clutch. The transmission is hard to shift into first or reverse apparently because the clutch is not releasing all the way. The clutch may be dragging even with the pedal depressed but not enough to cause the truck to move.

Just before the warranty expired, Chevrolet replaced the clutch hydraulic slave cylinder on the transmission. For "a while" the clutch was fine and then I realized the clutch linkage was self adjusting back to the too tight condition. At 5,500 (yep, fifty five hundred) miles I am back to the old problem of having to push the clutch pedal hard against the firewall to shift the transmission into first or reverse.

I have a 4.3 liter five speed and since new there has been the problem of having to push the clutch pedal into the floor mat to get the clutch to disengage. The dealer said that was normal.

Now with 27,000 miles, the guy I just sold it to is refusing to accept the same diagnosis of 'this is normal' and is insisting that I fix it. So far, I have replaced the clutch master cylinder with no change.

Can I put a shim in the clutch system somewhere to get the clutch to disengage with less pedal travel? Can I lengthen the rod between the pedal and the master cylinder to get quicker disengagement?

Is there a fix?

6 Replies

JERRY WAGNER

MEMBER
1 POST

This is my repair that worked for me after years of advice by GMC and dealers. The incorrect master cylinder was inserted in 2006 GMC sierra five speeds built in Silao, Mexico. There is a GMC bulletin number PIP 3864 F, dated Mar. 23, 2007. I got this information from a local dealer who said the part could be installed for $156.00 plus labor. GMC was aware of the problem but did not tell the purchasers and so caused me nine years of miserable shifting and 77,000 miles of fighting the transmission. Thanks to an AMS Automotive tech man, a Rock Auto supplier who really knew his parts, I was able to track down the correct part. The correct replacement clutch master cylinder number is 24242325 and can be obtained from www. Gmpartsonline. Com for $99.64 plus shipping.
I needed to remove the circuit box next to the clutch peddle to see what I was doing.
Remove the center nut and used a screw driver pop the plastic clips free. I had to purchase a special tool to uncouple the hydraulic coupling. The shaft on the replacement part is about 3/16 of an inch longer than the incorrect part. The shaft measured about 7.885 in. The white cap on the end of the shaft stayed in the clutch peddle and had to be pried out with a screw driver. I had to really jerk on the cylinder to get it to separate. On installation I used a piece of wood and good smack to get the shaft to push back into the clutch peddle.
This is just one more cover up by General Motors. I have five GM vehicles in my garage first time I have had trouble.

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Thursday, May 5th, 2016 AT 1:23 PM

MIKE H R

MECHANIC
3,094 POSTS

Clutch hydraulic system: Since the clutch hydraulic slave cylinder was replaced previously, it's less likely to be the root cause of the issue.

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Saturday, March 17th, 2018 AT 1:38 PM

BIKERPRIDE

MEMBER
2 POSTS
2005 CHEVROLET SILVERADO
0.6L
V8
2WD
MANUAL
15,000 MILES

Pre adjust clutch before I installed.

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Thursday, May 6th, 2021 AT 12:12 PM (Merged)

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

There is no pre adjustment for the clutch.

After installation, the system will need to be bled. There is a bleed screw on the throw-out bearing which is the slave cylinder.

The piston in the master cylinder is connected to the pedal push-rod. The clutch pedal has a spring for returning the piston to the clutch engagement position. The system is bled by pumping the pedal, self-bleeding, or by the vacuum pump method on the reservoir.

Roy

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Thursday, May 6th, 2021 AT 12:12 PM (Merged)

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