What fluid goes in the hydraulic release bearing on a 1990 jeep

It's time to change the clutch with entire kit. Release bearing, pilot bearing, clutch plate, pressure plate and get flywheel turned. If that bearing flies apart inside your transmission it will leave you stranded and your release fork will be destroyed possibly causing more damage to the transmission housing. It is hydraulic and if the master cylinder is working properly you're not likely to notice any play in the pedal due to release bearing.

it is dirty brake fluid that squirts out bleed it until clean fluid come threw

From the hydraulic clutch master cylinder.

try using a bearing that is in a metal casiing and not a plastic piece of junk that comes in the clutch kit nowdays ,they always end up going wrong where bearing melts the holder ,unless you can fit a thin telecamit tube and a grease nipple so clutch bearing can be greased every few months like on a good old fashioned commercial vehicle

CHECK CLUTCH SLAVE MASTER CYLINDER FLUID IF LOW CHECK FOR FLUID LEAKS AROUND THE LINES FIX. ADD BRAKE FLUID TO SLAVE MASTER CYLINDER.BLEED THE HYDRAULIC CLUTCH SYSTEM.IF FLUID LEVEL OKAY.SLAVE CYLINDER FAULTY OR YOU HAVE BROKEN RELEASE BEARING OR FORK.

These jeeps have an hydraulic system with a master cylinder up top and a hydraulic line leading down to a slave cylinder. You likely have a leak somewhere and your hydraulic fluid is gone.

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

i dont think you are supposed to remove it. they come with a hose master and slave cyl all put together.
i did get one aprt once and i think there was a roll pin i pulled out to do it

you may have a faulty clutch master cylinder or faulty clutch slave cylinder- leaking clutch fluid. most of the time both are replaced at the same time which should be recomended by your mechanic, the bolts to the master cylinder are very hard to get to and require the right tool.
you should be able to move car forward by selecting 1st then cranking engine till it starts, gear changes while driving are hard but not impossible. i recommend a tow truck to a local repairer.

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