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2006 ford escape hybrid rear vibration
I just purchased a 2006 ford escape hybrid with 130,000 miles, I test drove it up to 55 MPH and it drove great.. After i bought it I got on the freeway and at 60 MPH or more it has a very noticable vibration seems to be from the back of the vehical. Just wondering if anyone has had this happen to theirs before I bring it in. Thanks
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Re: 2006 ford escape hybrid rear vibration
F/awd..?
In which case rear driveshaft u-joints or a rear half-shaft CV joint(s). At that mileage I would vote u-joints. |
Re: 2006 ford escape hybrid rear vibration
Could be just tire balance. I'd check that first.
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Re: 2006 ford escape hybrid rear vibration
It is a awd, The vibration seems faster than a tire out of balance more like a u joint that I have had on other vehicals but I will sure check the balance, I got under it and tried to move the joints seem to be tight although the left rear axcel seemed to move in and out some. Thanks Guys
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Re: 2006 ford escape hybrid rear vibration
Originally Posted by fishbob
(Post 239926)
It is a awd, The vibration seems faster than a tire out of balance more like a u joint that I have had on other vehicles but I will sure check the balance, I got under it and tried to move the joints seem to be tight although the left rear axle seemed to move in and out some. Thanks Guys
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Re: 2006 ford escape hybrid rear vibration
Originally Posted by wwest
(Post 240074)
At those speeds the rear drive clutch should NOT be engaged so that leaves us with U-joints. Unless the rear drive clutch has failed in some manner wherein the rear drive is continuously engaged, even slightly engaged. That could result in pretty severe vibration of so.
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Re: 2006 ford escape hybrid rear vibration
Thanks for the info, I changed the rear u joint and it helped some but especially when cold it is worse, The rear u joint was dry and I plan to change the rest and will post the result after.
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Re: 2006 ford escape hybrid rear vibration
Originally Posted by wptski
(Post 240079)
It can still engage if you accelerate but not at a constant speed unless it detects front wheel slippage.
And I'm quite sure that should wheelspin/slip occur at ANY speed/condition the INSTANT result will be TRAC activation, engine dethrottling and front (logically presumptive) braking so as to most quickly restore traction to those all important front drive & directional control wheels/tires. |
Re: 2006 ford escape hybrid rear vibration
Originally Posted by wwest
(Post 240091)
It has long been my understanding that the rear drive clutch is NEVER engaged above 20-25MPH regardless of acceleration level.
And I'm quite sure that should wheelspin/slip occur at ANY speed/condition the INSTANT result will be TRAC activation, engine dethrottling and front (logically presumptive) braking so as to most quickly restore traction to those all important front drive & directional control wheels/tires. The AdvanceTrac would detect side to side slippage but back to front would engage the 4WD. |
Re: 2006 ford escape hybrid rear vibration
Originally Posted by wptski
(Post 240100)
That's incorrect. This can be easily seen using a Scanguage-II. I've even seen a slight engagement while coasting down a long gradual grade.
Coasting downhill, or even simply coasting, I can understand. It's always a good idea to have as much of the engine compression braking as is possible applied at the rear rather than all at the front. Back in my days in MT, pre-ABS, on a slippery downhill I would slip the automatic transmission into neutral and then use e-brake judiciously to maintain a slower speed and help stabilize the vehicle laterally at the same time. The AdvanceTrac would detect side to side slippage but back to front would engage the 4WD. Yes, I agree, the way I read the shop manual along with TRACTION control activation as described the rear drive will be simultaneously engaged. But keep in mind that this is always primarily, predominantly, a FWD vehicle. So if conditions are such that wheelspin/slip is likely to occur, it will almost ALWAYS present itself at the front first, initially. So yes, couple in the rear drive INSTANTLY, but the more important function is to return those front wheels/tires to a tractive wherein directional control is not threatened or can be asserted as/if needed. Thus you will almost always encounter TRACTION control activation simultaneously. |
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