I've done some searches but haven't found anything specific to my problem. I have a recently purchased 99 F-250 P-stroke with the auto tranny. It has 75K. New Ford factory tranny was put in before I bought it at 73K.
I went hunting this weekend and the wife ended up taking the truck hotspringing with the gals. After unpacking she said my truck was making a loud noise. She described it as a very loud humming sound like tires going over a metal bridge or recently torn up road. She said she stopped and checked the front hubs to make sure they were in "free" and they were.
I drove it this morning and a very loud low pitched grind\vibration started around 25 mph and didn't go away. I only got it up to 40 mph, but the wife indicated that it was happening at highway speeds. When slowed down to take a corner < less than 10mph the noise went away. At idle at stop lights there is no noise, except for that beautiful sounding diesel idle
It sounds bad.
The guy I bought it from gave me all the service records and it is a factory Ford serviced truck. I have an appointment with the dealer who performed all of the services, but they can't get me in until Thursday.
From my searches, I am thinking that it could be the following:
1) Front hubs\wheel bearings
2) Ball joints, although I believe they were done about 15K ago.
3) Front drive shaft/U-joints
4) Transfer Case (shudder)
The tranny is shifting fine, no hard shifts and I have plenty of power. Just last week I noticed some oil leaking just passenger side of center towards the front of the motor. Sometimes it would leave one half dollar size of oil, other times it was 4 spots of oil much smaller. Don't know if they are interrelated. Would a leaking crank seal cause that kind of grind\vibration?
Additional driving impressions: very pronounced vibration, can feel it in the gas pedal, steering wheel etc. Definitely present at >25mph and continues. Louder than engine. No power loss, tranny shifting through all gears smoothly. It is seems to be more engine or something along those lines.
Thanks in advance. I have learned a lot on this site just from lurking.