Al

2008 F150, 4.2 lt. automatic. 23,500. miles.
Suddle Vibration begins at 38 mph and continues through 44 mph. Doesn't matter whiether climbing a hill or drifting. Low level vibration
Any ideas?
AB Bob. (Al)
email address ab_handycraft@yahoo.com
Thanks

Purplehazeir

Check you tires, have them balanced and rotated. If that solve the problem then you're not out lots of money. Is the vibration felt through the whole truck, the front end or?

Al

Tireshave been checked and balanced.
The vibration is not in the front end. It seems to be the entire truck. When in drive at 37 to 44 mph the vibration becomes noticable.
Thank you for your reply.
Al

Purplehazeir

Crawl under the truck and check to make sure that the drive line hasn't thrown one of its balance weights.

Have the tires been trued?

donnygo

2008 Ford F-150 parking brake TSB (Bulletin 08-14-18)
Bulletin Date: Mar. 1, 2008
Component: Parking brake.
Bulletin Summary: Intermittent vehicle vibration--parking brake disengagement concerns.
Vehicles covered in this TSB: 2004 Ford F-150, 2005 Ford F-150, 2006 Ford F-150, 2007 Ford F-150, 2008 Ford F-150, 2006 Lincoln Mark, 2007 Lincoln Mark, 2008 Lincoln Mark.

Bill

I've had this before. Turned out to be a universal in the drive shaft going bad.