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Just purchased a used 2005 escape last week and have a mild vibration in the steering wheel (which can also be felt through the seat) between 80-90 km/hr. When I test drove the vehicle the vibration was there at all speeds and dealer said it was tires. They put 4 brand new hancooks on it but I still have the vibration between 80-90. Seems to be more pronounced when the vehicle is cold?? A warranty claim was done at around 50K by previous owner and the whole rear diff was replaced. Anyone know what could be causing the vibration now?
It still sounds like a classic case of a tire out of balance. It may be possible that you are the victim of "bad luck" and one of the new tires can't be perfectly balanced. You might try rotating the tires and see if the vibration changes. Poor balance usually feels worse on a front tire than on a rear tire.
...but might you have a bent wheel or a hub that is not properly centered?
If I have a tire out of balance, I can usually pinpoint the corner of the car or truck pretty well. If it is one of the fronts, if you swerve very gently back and forth (do this where there is no traffic), the bad wheel/tire will usually bounce more when it "unloads". Likewise, if it's the rear, you won't feel it as much thru the steering wheel, but it may still be able to be located.
Alternatively, I suppose it could be a driveshaft, etc. I would continue to work with the dealer until the problem is gone to your satisfaction.
When I first read your post, I was gonna say that 80-90 mph is pretty fast, but then noticed you were talking kph....
If indeed it is more noticeable when it is cold, that is a puzzle.
Possible that if it's worse when it's cold, the tires could be flat-spotting, but then I'd expect them to go totally smooth when they're warmed up (maybe 5-10 miles, depending on how cold it actually is). Unless you have the lucky coincidence of flat spotting PLUS an imbalance. Air pressures can make a diff--tires will flat spot less with more pressure, whereas I've found that a balance problem is usually made worse with more pressure and a tiny bit better with less pressure because the softer tire will soak up a tad more vibration.
One other thought--are they doing this on a particular stretch of road? There is a freeway near me that they repaved in asphalt a few years back, and it's just a tiny bit wavy--so that one of my cars with a shorter wheelbase gets a vibration happening on that road that is just not there on other roads, or other cars. The Escape wheelbase is 103" or so, exactly the same as the car I have that has this vibration (an older BMW, which also has flat-spotting issues with the tires because it sits for long periods of time.)
Before they changed the tires, did you happen to notice any weird wear patterns in the old tires--cupped treads, etc?
I would first look for a bent rim (somebody hit a curb at 10 mph!). I would also look for a bad motor mount; unfortunately, the only good way I know to do this is to take off the motor mounts and inspect them. The rubber can split and then you get the vibe. It could be very hard to tell if a motor mount was damaged unless the damage was 'catastrophic'.
On my 06 I had a vibration that was balance related. The Tire Presure sensor was flooting around inside the tire as it broke free from the mount. Once replaced and balanced no more problem.
Since I only have about 1000 kms on the brand new tires, doubt it is flat spotting. Does it on all road surfaces (paved that is). It's going back to the dealer tomorrow.
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