check to see if it's drivetrain related or tire related
at 40-50 mph, turn of the O/D...or shift down into 2nd gear. this will change the RPM range you are in and can help isolate the vibration really quickly
if vibration goes away = driveshaft balance issue or maybe you need some u-joints
if vibration stays constant = tires need balancing
__________________ 2002 Excursion XLT w/ V-10 <---Build thread 2005 Cadillac Escalade w/6.0 - I was a loyal Ford owner for years - Now I'm not - I suggest you carefully evaluate their policies before trusting that supposed Warranty
I had a similar problem. at 60+, my back end felt like it was vibrating. On the highway, I got up to 75 and it was really bad, shaking the steering wheel a lot. Does your vibration only happen at 40-50 mph?
I had recently gotten new tires, so I took them back and said what was up. They removed all the weights and rebalanced them for free. It fixed the problem.
Did your issue start after a recent service or repair? Like new tires?
I checked for mud, happened on my moms explorer once (I luv bein a Ford family lol) it also does it around 93 MPH but mostly noticeable at 40-50, I have the 20"s with street tires on them so Im guessing they are quite sensative to improper balancing, soon as i can ill take it to a tire shop, hopefully the hobby shop on base has their new balancer up n running, it would be cheep or even free that way
Well, I live in the desert. Just as a georaphical reference for ya.... the nearest starbucks is an hour and a half of driving litterally through the desert to get to it, good thing i dont like starbucks! If you're out on that open desert highway, and not being an A hole or doing over 100, cops usually dont mind
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