Clutch not working after replacing slave cylinder and master cylinder

The clutch pedal went to the floor on my car and I realized the clip holding the rod into the back of the pedal was broke so I changed the master cylinder and pumped the clutch up and lost pressure then realized that clutch fluid was leaking out of the transmission so took the car apart droped the transmission changed the slave cylinder inside put the car back together now I have clutch pedal and the car goes into gear but will not go. When I push the clutch pedal all the way down and put it in gear I hear a whining noise coming from the transmission area but when I release the clutch peda
Experienced mechanics share their insights in answering this question :
Hello. We will be happy to help you with your vehicle. It sounds like you have a problem with your throw out bearing. You would likely need to drop the transmission once again and check that the installation of the throwout bearing is proper. You may also try to peel back the boot around the slave cylinder to see inside of the transmission. By doing so you may be able to see possible damages on the throwout bearing. It will be a great idea to use a stethoscope before you take the vehicle back apart to help pinpoint exactly what portion of the transmission coming from. Another very important thing that you should check are your axle’s, make sure they are seated correctly inside of the transmission.

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There could be a leak on the slave cylinder causing the slave cylinder not to operate. Also, check the pin to the clutch pedal and make sure that it is hooked up to the clutch master cylinder. Check the lines and make sure that they are not cross threaded, which will not seal and cause a leak.
If a clutch master cylinder goes out, nothing happens when you push in the clutch. The clutch will not disengage.
Frequent causes why the clutch doesn`t disengage correctly include faults in the release system (clutch release bearing, slave cylinder, clutch lever), a jammed pilot bearing, or non-compliance with important installation requirements.
A clutch that won`t engage at all means there is serious damage somewhere. Check for a bent linkage, a seized slave cylinder, or a seized throw-out bearing. Beyond those, check for binding in the linkage, a corroded cable, or a failed friction plate.
The seal over port system uses a push rod attached to the clutch pedal to produce piston movement in the master cylinder.
Yes master cylinders can fail without leakage, the clutch master cylinder has a piston inside and there are separate channels for hi-pressure line and return(low pressure) line and their location in the cylinder differs for manufacturers.
The classic symptom of a failing master cylinder is a brake pedal that “dives” or sinks slowly to the floor while pedal pressure is being applied. Another sign to look out for is any leaks around the master cylinder. If a seal is worn out, it may leak past the seal and onto the pushrod that attaches to the brake pedal.
A hydraulic clutch relies on pressurized fluid to amplify/transmit force, so whenever an air bubble gets into a closed hydraulic system, it can dramatically decrease the system`s ability to pressurize the fluid. That, in turn, can prevent the clutch from being able to fully disengage when you`re shifting gears.
This can be from the air in the system causing the clutch slave cylinder to not move far enough and disengage the clutch all the way. You may also have a pressure plate that is not releasing the clutch completely. Try to position your vehicle with nothing in front or behind you.
Even if there is no external leak, slave cylinders can go bad internally.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Clutch pedal stays to floor. Replaced master cylinder. Clutch push rod broke. Also do I need to change slave cylinder
ANSWER : If you have an issue with your clutch pedal going to the floor, the slave cylinder is normally the cause of this circumstance.

Also, if the push rod has been broken the first step would be to track down a new one because that push rod is a very necessary part of the clutch pedal system.

Once a new push rod has been located and installed, I would recommend having a new slave cylinder installed as well.

If you are in doubt about this repair, I would recommend having it performed by a qualified professional, such as one from YourMechanic. One of our mobile technicians will be able to come to your home to diagnose the issue with your clutch pedal and replace your clutch slave cylinder as necessary.

I have no clutch it goes to the floor and I cannot find the slave master cylinder for the clutch master cylinder please send pics
ANSWER : The reservoir supplying the fluid to both cylinders is the brake master cylinder reservoir. However, adequate fluid there means nothing as a diagnostic. The clutch slave and/or master cylinder could be leaking internally (no visible external leak) or there could be air in the clutch hydraulic system that will have to be bled out. There are other mechanical causes of the clutch pedal going to the floor but in your circumstances that hydraulic circuit should be looked at first. If you desire a diagnostic, and repair of this issue, right at your location, please request a clutch system inspection. If you request that inspection, the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Clutch not working after replacing slave cylinder and master cylinder
ANSWER : Hello. We will be happy to help you with your vehicle. It sounds like you have a problem with your throw out bearing. You would likely need to drop the transmission once again and check that the installation of the throwout bearing is proper. You may also try to peel back the boot around the slave cylinder to see inside of the transmission. By doing so you may be able to see possible damages on the throwout bearing. It will be a great idea to use a stethoscope before you take the vehicle back apart to help pinpoint exactly what portion of the transmission coming from. Another very important thing that you should check are your axle’s, make sure they are seated correctly inside of the transmission.

Clutch pedal goes to the floor and doesn’t return
ANSWER : Hello, thanks for your question. You could watch the clutch fluid as it mentions in the test, but this really doesn’t tell you much. Most of the time this is caused by a bad clutch master cylinder. If the fluid level is low the first thing to do would be to locate the leak. If the fluid is full then I watch to see that he clutch slave is moving when the clutch is pressed. If it is and if it is releasing but the pedal stays down then that is another reason to change the clutch master. If the clutch slave and fork are not releasing then it may have an internal clutch failure. If you would like help getting this inspected or repaired, consider YourMechanic, as a certified mechanic can come to your home or office to perform the inspection and make or suggest any repairs needed.

Master cylinder and clutch slave cylinder replaced
ANSWER : Unfortunately, using the same plastic clutch slave cylinder assembly the vehicle was manufactured with will cause the same results if the vehicle is abused. The plastic part is very strong, but cannot withstand the heat and pressure from hard driving. You may be able to do some research and find a higher performance part produced by an aftermarket company, as some companies specialize in manufacturing upgraded parts for higher performance. If you would like some assistance with this, one of the technicians from YourMechanic can come to your location to inspect the shaking problem and let you know what repairs are needed.

Replaced clutch master and slave cylinder, but my car still won’t go into gear while running
ANSWER : If the hydraulics are working correctly, there are a couple of things that could be wrong with the clutch that would prevent it from releasing. Unfortunately, any of them will require removal of the transmission for repair.

At 191,000 miles, it could be that your pressure plate has failed and is not fully releasing, or it could be that the disk is severely worn and there is an accumulation of debris between the disk and the plate which would also keep it from releasing. Either of these would be corrected with a clutch replacement.

If you contact YourMechanic, they can send a technician to your home to evaluate your problem and help you figure out what to do next in order to avoid any unnecessary repairs.

My clutch is not working Entire clutch repair or clutch master cylinder repair? How do I check the cylinder?
ANSWER : Hi there. Check the slave cylinder to the clutch and see if the piston is all the way out. If the piston is all the way out or its not touching the clutch fork, then the release bearing has broken and the fork has moved into the clutch. If the slave cylinder is relaxed and the fork is against it, then the clutch pressure plate has sprung a pressure spring. If the pedal can go down but not all the way to the floor, then the clutch needs replaced with a new release bearing. If you need further assistance with a clutch replacement, then seek out a professional, such as one from Your Mechanic, to help you.

I just replaced my brake master cylinder and the brakes still feel soft. What do I need to do after I replace the master cylinder
ANSWER : From what you’ve described you will have to bleed your brakes. Also, I believe you may have a leak in one of the lines. You may want to use a wrench and tighten the lines a little more. If you’re unable to fix this yourself, consider YourMechanic, as one of our mobile technicians can come to your home to bleed your brakes, diagnose the Check Engine Light, and help you make the appropriate repairs to your car.