What is the death wobble?my oil pressure gauge shoots up, but my steering wheel wobbles from time to time,

 

You may want to start a new thread.
If you have death wobble you'll know it. The first time it happens on the highway you stop, get out and look for suspension/steering parts that must surely be laying on the road somewhere. (there won't be any)
A mild steering wheel shake is not "death wobble".

 

I have a 1999 bone stock 4.0L with 197,xxx on it. It runs great and makes no noises. Last week my oil pressure climbed to 60 lbs doing about 30 when cold. I checked the oil and changed it with brand new synthetic 5w-30, It dropped to about 55 lbs cold driving. When the engine warms up its about 50 lbs normal driving. Cold idle is 50 lbs and hot idle is 35-40 lbs range. I replaced the oil pressure sending unit and it didn't seem to change anything. Any ideas? Its not terrible but it wasn't like this a few weeks ago. The engine runs great like I said, so I'm not too concerned. Thanks, jonpost