I am having a few problems on my 02 subaru outback sedan h6 3.0 my driveshaft feels like it is jumping. I am also getting a ping noise anytime I shift from park to reverse or drive. I am also getting a humming noise in the front passanger side and rear of the car

1.1 mm or 0.044 ins

You can't. The right way to fix it is to go to a junk yard and get another or the dealer. You could send it to a machine shop and have them do it it is next to imposible to get the new joint centered right if you could even get it out.

This is the best i could find.

How To Install Replace Change Taillight and Bulb 2000-04 Subaru Outback

try disconnecting the + positive terminal for a few minutes and see if it goes out most likely the 02 sensor needs replacing ...however low fluid levels may also contribute to this oil,brake fluid etc.

steering column bearing sounds like a worn out steering column... jack the front wheels off the ground both sides relieve load on steering wheel to see if it lessens the amount of feel and noise, if it does it shoud be the column bearing, replace bearings or complete column,,, also try with the wheels off the ground and safely supported to manualy steer the wheels by hand and see if you feel in roughness or hear any noises,should some minor resistance but be smooth in it movement if everything suspension and steering component wise is in good working condition... please rate my help.. thanks...

I had similar problem with my '99 outback. Replaced the front half shafts and seemed much better. A few months later seemed to be comming back so replaced the driver side shaft again and the problem disappeared. I had put in rebuilt shafts and the driver side shaft was not rebuilt correctly.

heavier oil if you are not in a cold climate. but before you do that have the oil pressure checked. We used to use a can of STP every once in a while on a motor in a dodge we had... nothing wrong with it... was just noisy.

Robert

Turn off engine . get the vehicle on level ground. try to move driveshaft back an forth or,by rocking in twist motion,,, try to hear a knock,,,this would indicate a worn universal joint.either front or back, if you are good enough to discern which one is making the klunk, change both to be on the safe side. think they may be about 20 dol apiece.