I have an 02' Lincoln Blackwood with 23000 original miles. I recently have had problems with the truck, at fairly regular times but not always, vibrating as I accelerate from 45-50 MPH when it goes into overdrive. It does eventually stop vibrating after a while as I get to higher speeds. It will also tremble as I go up very steep hills at lower speeds of 25-35 MPH. If I drop out of overdrive into 3rd on flat land, it will stop shuddering, (it's as if I'm going over small ripples's in the pavement), or if I'm going up a steep hill, I have to drop it into 2nd for the hesitation to stop. Engine light code of P0174 comes up, ("System too Lean (Bank 2). My guess is that I have a partially clogged injector. Any input would be greatly appreciated, before I take my rig into the "Stealershiup".

 

See if it quits if you step lightly on the brake pedal. If it does you might want to have the tranny fluid changed.

JB

 

Well, after driving almost 300 miles with this vibration, my computer finally coughed up a code, P0308: "Cylinder 8 Misfire Detected". Looks like I'll be changing a coil soon. Now why did Ford design a computer to throw up codes many driven miles after the problem starts up? My GM car throws a code up almost immediatelly after a problem starts.

 

Jim Blackwood: Yes, the vibration actually stopped if I applied a little brake pressure, but it still turned out to be a coil in the end.

 

Consider yourself lucky, and have the tranny fluid changed more often than you are used to doing. The TCC has a tendency to develop a chatter and clean fluid and the additive is helpful.

JB

 

Add Lubegard shutter-fix to the tranny fluid between changes and their Auto tranny suppliment for a fluid change - I had the shutter and the additive fixed mine.

 

Bigblack... just a bit of knowledge passed on, that too lean code can also be caused by vac leaks. i see it all day on them 5.4s, theres a elbow on the back side of the intake that is really acceptable to heat. so if it happens again check it out cause it can foul plugs by trying to compensate. some times it will appear in both banks but ive had some on just one side. just trying to spread the knowledge lol.. and yea the tranny in mine is junk as well been acting funny since 80k

 

The rear end is different from normal trucks It has its own separate subframe held in by bushings.
I would look to see if there's any play in the bushings, If there is that can cause a vibration around 50 to 70 mph going up hills.

 

Looks like this was fixed 13 years ago.