How much gear oil does a 1999 wrangler take in the

Well if it's just doing that you do need differentail fluid and you may need to check the gears inside for worn or damaged parts

Pinion seal. It's pretty common. http://youtu.be/Z0zz1_4UYqk

you have to take a big hammer and knock it out. you will have to hit it a lot but it will come out.

blocked oil cooler.Not cooling oil.

Pump is fairly simple...remove pan unbolt pump and reverse procedure. It is good to pre-lube pump and fill oil filter before starting engine. BUT: Keep in mind that a damaged pump is generally not the cause but the result of a failure elsewhere. Primary reason is rod or main bearing wear, resulting in debris scoring the pump gears and internal surfaces. Therefore, changing the pump will at best, slightly raise pressure only for a very short time. If after removing the pan, you find that the pump pickup is nearly blocked off by hard carbon deposits, you may have a chance of regaining pressure, providing bearings have not been damaged by low oil suppply caused by that restriction.

Hello grega1967, your Jeep Wrangler came from the factory with gear oil in the axles and manual transmission, but the transfer case uses transmission fluid. It is a NP231 and your axles are Dana 30 in the front and Dana 35 in the rear. They should have a 4.10 gear ratio due to you having a 2.5 liter 4 cylinder.

I hope this helps,

map6260

i would say your reverse gear is locking up on you and that you need to get it to a transmission shop before you break the gear off trying to back it up,,it will mess up the other gears

80 w 90 gearlube

A. Public Library under Haynes Manual for your truck
B. Local dealership parts department, they can copy it for you
C. Auto Parts (some can) can print it right off their pc

I maybe able to help. Did it make any noise when you tried (grinding or groan hum exe..) or just not work. If so the first thing I would do is to change the transfer case oil, check for metal in the oil, if there is that's really not good, take to shop. If no shinny metal replace with good quality oil, if it's red use atf if black or brown use 75W 90 and some. Auto trans fluid is recommended in cold climates or adding torque modifier check with parts store or dealer prefferably for what to use unless comfortable with choice then change front differentail fluid, with recommended fluid and torque modifier for limited slip differentails 2oz or alittle more. both holes fill till you can stick your finger in an just bairly bend it 1/8 or so inches and touch fluid. don't try to fill all the way if it comes out of the whole your filling clean up mess and allow as much to drain out as possible. If that happens you may have it vent through the vent and may see/ smell what every you put in it. If your comfortable with taking the diff cover off and replacing the gasket if needed (usually is) make sure its clean, don't use water or anything water based brake clean is good but check for metal and brownish or simial colored stuff in bottom of housing and of course metal. The teeth on the ring gear and pinion( ring gear is the small one in the back, ring gear is big and will be closest to you. if you have hunks of metal in there its smoked and replacement of ring gear and pinion is required (not cheap) there is alot more to look for but that should start you off in the right direction.