Question about 1991 Jeep Wrangler

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1990 jeep wrangler, have had master cylinder and slave cylinder replaced twice. While driving down the road you will lose the clutch, have presure checked hoses and fittings any help would be great.

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  • tinydts Nov 06, 2010

    No fluid leaking dry under jeep, different parts houses used for second change of master and slave cylinder. Help????

  • tinydts Nov 06, 2010

    Slave and master cylinder have been replaced twice and used different supply houses, this work is being done by Dodge Dealership, they are stumped also. Why would you think is might me the clutch itself when it works fine for awhile.

  • tinydts Nov 10, 2010

    The jeep is a 4 cylinder 2.5, vin is 2J4FY19E6LJ531875, Jeep has around 115,000 miles on it, clutch was replaced short time ago, Drove it for about 2 miles, clutch would not release, went back to shop and put jeep on stands and run for over 3 miles and clutch worked just fine.????????

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  • Jeep Master
  • 1,420 Answers

Engine size please and the eighth digit of the VIN Thanks ,lee

Posted on Nov 07, 2010

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  • Jeep Master
  • 6,826 Answers

If the master cylinder and the slave cylinder were replaced, was it because there was leakage there?
Also, are the hoses perfect, or when you press on the pedal is there a visible bulge (may need a friend to look at it or press the pedal for you)?

If the problem is not in the hoses, slave, or master cylinder for the clutch pedal, then it's within the manual transmission. A rebuild of the mechanical clutch parts past the slave cylinder may be required to rectify this situation.


--- BLEEDING THE SYSTEM 1987-93 Models

  1. Fill the reservoir with clean brake fluid.
  2. Raise and support the vehicle on jackstands.
  3. Attach one end of a rubber hose to the concentric bearing bleeder screw and place the other end in a jar, filled halfway with clean brake fluid. Make sure that the hose will stay submerged.
  4. Loosen the bleeder screw.
  5. Have an assistant press and hold the clutch pedal to the floor. Tighten the bleeder screw with the pedal at the floor. Bubbles will have appeared in the jar when the pedal was depressed.
  6. Have your assistant release the pedal, then perform the sequence again, until bubbles no longer appear in the jar.
  7. Lower the vehicle and test the clutch.
1994-95 Models The clutch master cylinder, slave cylinder and connecting line are sealed units and are prefilled with fluid at the factory. 1990 jeep wrangler, have had master cylinder and - prev.gif next.gif

Posted on Nov 06, 2010

  • Duane Wong
    Duane Wong Nov 07, 2010

    By a process of elimination where the master and slave cylinders and hoses are assumed to be fine.



    I had a problem with a motorcycle posted on fixya.com where a man with a high mileage Honda, over 110,000 mi., had a problem with the clutch lever sometimes bottoming out and sometimes stopping about 1" or 2" from the handle. And, the problem on the motorcycle is that the clutch has too much play inside the mechanism and the hydraulic parts are ok.



    If you want to keep changing the master and slave cylinders you can, but I don't think that will solve the problem on your vehicle.



    I think that if they change out the clutch, the problem will go away. It's more expensive to perform this task than simply changing the master and slave cylinders and the tube that connects them.



    Once they take it apart and replace all of the wearable parts, I think it will work more reliably and consistently.



    Good luck on the clutch repair.

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1 Answer

I have a 2000 Jeep wrangler and the clutch will not press down at all.


Look to make sure your Hydraulic fluid level is full for the clutch. It is located near the brake master cylinder(see owners manual) . If it is low , fill it and pump the clutch pedal a few times and see if that takes care of it. If it doesn't then I would be looking at replacing the slave cylinder and master slave cylinder for the clutch. If it is completely empty and you fill it and pump it a few times, and its back to empty. Yes, you guessed it, look for a leak.

Jan 14, 2011 | 1995 Jeep Wrangler

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1990 Jeep Wrangler: When I depress the clutch petal with the engine running and the transmission in 1st, the jeep wants to move forward. I have to time the engine speed to shift from 3rd to 2nd and from...


Sounds like a leaking master or slave for the clutch that is not permitting full disengagement. If it only happens when cold it could also be caused by incorrect lube (too heavy) in the transmission, but that is unusual.
Make sure the fluid in the clutch master cylinder is full and that there is no visible seepage where the rod enters from the pedal and that there also is no seepage at the slave unit.

Jan 02, 2011 | 1990 Jeep Wrangler

2 Answers

Clutch fluid leaking off quickly. The fluid is dripping out of the cover on the front of the transmission. Where/what could the problem be?


The clutch hydraulic control unit cylinder seals have failed. It is inside the bell housing and will need to be replaced.

http://t3.gstatic.com/images?q=tbn:-uQXZrnPohb3WM:http://shop.oreillyauto.com/product_images/img/ben/12305_040106.jpg

If you go to this page... then allow pop ups and enlarge the image it is upper right in the picture here:

Here is a parts source.... the cylinder is 3/4 of the way down the page scrolling.

http://www.jeep4x4center.com/jeep-clutch-parts/wrangler-yj/index.htm#cylinders

What ever you do... verify that the part is actually leaking. It could be a leaking line and these are NOT cheap to replace. Jeep finally figured out in 1994 they should once again be using a slaved cylinder.

Thanks for using FixYa.

Kelly

Jun 26, 2010 | 1990 Jeep Wrangler

1 Answer

Gear shifting problem in 1993 jeep wrangler


It is likely leaking at the slave cylinder

Jun 06, 2010 | 1993 Jeep Wrangler

3 Answers

!991 Jeep Wrangler clutch pedal loses pressure. I have to pump it to get enough pressure to shift. I keep it full of brake fluid. I can see no leaks. Thanks for any help.


leaky slave or master cylinder - if you have someone listen to the slave cylinder while you press the pedal is should "squelch" if there is air in there, if the slave cylinder doesn't make a squelching sound then the master cylinder or a hydraulic line between the two cylinders is leaking - slave cylinder isn't very expensive but the master cylinder can be rather pricey. and any good parts shop or motor-factor can source or make-up a new hydraulic line if it is the line itself that is leaking.

Jan 27, 2010 | 1991 Jeep Wrangler

2 Answers

1989 jeep wrangler wont shift gear and clutch gone loose


Get the clutch slave cylinder and master cylinder looked at.One of the 2 has failed.If the pedal goes to the floor or is very loose,this is very likely the cause.Not an expensive fix.Hope this helps

Jan 10, 2010 | 1989 Jeep Wrangler

4 Answers

Is there a way to adjust a clutch on a 1990 jeep


On the clutch cable, you will see an adjustment nut, Turn right to tighten and left to loosen.

Aug 02, 2009 | 1990 Jeep Wrangler

3 Answers

1990 jeep wranger slave cyclinder


The clutch slave cylinder on this model is located inside the transmission bell housing. You would have to pull the tranny to see it.
Bleeding the slave cylinder is a fairly simple process.
Underneath the vehicle on the driver side you will see two hydraulic lines going into the transmission where the tranny connects to the engine. If you have trouble locating just follow the hydraulic line from the master cylinder on the firewall.
One of these lines is actually sticking out of the tranny and has a bleeder valve on the end.
You will need a 9/16 box end wrench and a 5/16 or 1/4 inch box end wrench and someone with you to press the clutch pedal while you are under the vehicle.

1. Top off the master cylinder with clean brake fluid. Also, MAKE SURE you keep the fluid level in the master cylinder topped off during this process. You may need to have a second helper to take care of this so you don't have to keep climbing out from underneath.

2.Hold the line with the 9/16 and loosen the bleeder valve a couple turns or until fluid begins to drain. Have someone SLOWLY depress the clutch pedal to the floor and hold it down to the floor until you tighten the bleeder valve back up. MAKE SURE YOU ARE OUT OF THE WAY OF THE SQUIRTING FLUID WHEN THE PEDAL IS DEPRESSED!!

3. Once you are sure the valve is tight, have them pump the clutch pedal a couple times . Repeat step two until the pedal has a full stroke.

Jan 02, 2009 | 1990 Jeep Wrangler

2 Answers

Hydraulic clutch for jeep wrangler 2000


hello usaully it is on the slave if not try to hold the clutch pedal in overnight with a stick or something take the cover off the master for the slave so air can escape thru the top goodluck

Sep 18, 2008 | 2000 Jeep Wrangler

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