Leaking seal......

Hi everybody......
I have a problem with my chevy pickup 4x4 -89.... it leaks oil from where the yoke comes out of the gearbox or the transfercase.....not really sure. So my question is how do i go about changing the seal that seems to be leaking? What do i need? Is it difficult changing it by myself? I would REALLY appreciate any help i can get.....and im from sweden so i hope u understand everything i´ve written..... oohhh almost forgot, it only seems to be leaking when it´s parked with the front upward and been standing still for a while....my parkingspace is leaning upward......

Thanx for all the help i can get...... :)

/Sam

If it is leaking from a slip yoke I will assume that it is leaking from the rear driveshaft output shaft housing seal. I have never replaced this seal before but all you should have to do it remove the driveshaft starting at the rear, then if your driveshaft happens to have a carrier bearing you have to unbolt that, then pull the driveshaft towards the rear and out of the transfer case. Just to make sure you know fluid may leak out especially if you are on a hill. Some tranfer cases bolt to the driveshaft. If yours happens to be one of these you have to take offa nut to remove a yoke from the transfer case. A seal removal tool would be easiest however a screwdriver should work, just be carefull not to scrape the screwdriver againts the inside of the seal bore because it could cause the new seal to leak as well. Lubricate the new seal with automatic transmission fluid, install the seal with a socket slightly small than the diameter of the seal, I would use the socket turned around so you have more surface area to contact the seal and less pressure at one particular spot. Install is reverse as removal. If you have a nut on a yoke instead of th driveshaft that slides out the torque for the nut is 110 ft-lbs unless you have dual rear wheels then it is165 ft-lbs. Driveshaft strap bolts torque is 15 ft-lbs for 1500 and 2500 series, and 27 ft-lbs for 3500 series and 25 ft-lbs for center support bearing if you have one that is

So if i raise the back of the car there wouldnt be any oil coming out of the yoke thats coming out of the transfer case.....probobly best to buy some oil just in case.....

Just turn it around and you'll have no leaks....

thats one way to do it.......but the idea of an leaking seal would keep me from sleeping at night.......

O yea I forgot to mention to make sure to apply the parking brake and to chock your wheels so you do not disconnect the driveshaft then have the truck start rolling on you. I am sure it has happened to somebody before. They don't hand out them Darwin Awards for nothing