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2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 or 4.2 V6 engine
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Old 04-11-2010, 03:43 AM
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vibration between 40 and 50 mph

anyone else experience this?? where should i start
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Old 04-11-2010, 04:14 AM
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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
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Old 04-11-2010, 08:01 AM
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9.5 times out of 10 it will be a tire balance problem.
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Old 04-11-2010, 08:19 PM
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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?
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Old 04-14-2010, 05:41 AM
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...if you've been in the mud lately, make sure none stayed on the wheels (check inner areas). It will act like mega balancing weights and do what you're describing.
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Old 04-15-2010, 10:36 PM
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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
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Old 04-16-2010, 06:33 AM
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Quote:
Originally Posted by USAF FordGuy View Post
I checked for mud,........... it also does it around 93 MPH but mostly noticeable at 40-50,.........
Tsk, tsk, tsk. I guess you found out about the vibration at 93mph on the racetrack, correct? Click the image to open in full size.
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Old 04-16-2010, 03:53 PM
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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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Old 04-16-2010, 03:53 PM
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