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Explorer sport shudder at 55mph

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Old 05-12-2017, 11:21 AM
twayne85 twayne85 is offline
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Explorer sport shudder at 55mph

Hey everyone, I haven't posted in hear before and didn't find anything similar to my problem doing a search so I thought I would start a thread.

I have a 2014 explorer sport with the 3.5 ecoboost. I have an issue with a shudder/ jerk sensation when doing between 50 at 60 in 6th gear. Its very slight and is only noticeable on smooth roads (which in central Texas there aren't a lot of.) Typically happens on slight acceleration or climbing hills. It has been to the dealership several times and they can't figure it out. Only happens at those speeds around 1500 rpm in 6th gear. Nothing above 60 and nothing below 50 really. Its just noticeable enough for me to be annoying.

Dealership's first solution was a new PTU for the all wheel drive. Next solution was to completely remove transmission software and then reinstall and have it go through the learning process. Neither "fix" worked.

Has anyone had similar experiences and had a fix for it? I have searched google and found a few similar problems but on f150s with the ecoboost.
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Old 05-12-2017, 03:25 PM
PupnDuck PupnDuck is offline
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How many miles on the Explorer? Has it been getting progressively worse? Even a little bit? What if you put the vehicle in some of the other drive modes - particularly snow mode - is it different? Could be drive shaft u-joint getting worn out.
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Old 05-12-2017, 03:31 PM
twayne85 twayne85 is offline
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I haven't changed it into any of the other drive modes because it is only happening at cruising speed between 50 at 60 in 6th gear. If i manually downshift to 5th the problem seems to go away. Once it is above 60 there are no issues. The dealership recently thought it could be the axle shafts, they said they have heard of some of them being out of balance and causing an issue. My comment was, if that is the case, then it should be happening in other gears, not just 6th...

The explorer has about 31k on it. It doesn't seem to be getting any worse. Its just a weird little shudder, almost like it is slipping but that doesn't seem to be the case.
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Old 05-12-2017, 04:51 PM
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COULD it be an engine miss at a particular rpm / load combination ?!?

I was fooled by that in a Jeep once...
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Old 05-12-2017, 09:02 PM
twayne85 twayne85 is offline
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It could be a miss and thats what i first thought it was. unfortunately, the dealership cant seem to find anything.
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Old 05-15-2017, 02:38 PM
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document, document, document

and try another dealer before the 36k warranty is out ?
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Old 05-16-2017, 11:13 AM
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Most likely its torque converter shudder. I have seen this trans do this a few times and its pretty easy to diagnose with Ford's IDS. All they have to do is monitor TCSLIP_ACT and TCSLIP_DSD pids while driving it. Any shudder will show up as a sawtooth pattern on TCSLIP_ACT.
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Old 05-19-2017, 10:11 AM
twayne85 twayne85 is offline
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If it is a torque converter shudder, is there a fix?

They claimed they did a lot of monitoring and driving but can't find anything. I think the problem is, they aren't driving it in a way that would make it happen. I believe they are driving it hard thinking its some violent shudder, no matter how many times I have explained that it is only under light load between 50 and 60 in 6th gear.

It is going back to the dealer on Tuesday next week for the tech to have another look at it.
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Old 05-19-2017, 11:09 AM
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Yeah replace the converter and change the fluid. None I have done have came back with the shudder. Some were so bad it felt like an ignition misfire.
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Old 05-19-2017, 11:11 AM
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If they can't duplicate it ask for a flight recorder. You may have to pay a deposit but will get it back when you return it. It basically monitors all the sensors all the time and when you feel the concern you press a button and it makes a recording. Then you go back to the dealer and the tech downloads the recordings and looks for anything out of whack
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Old 05-21-2017, 10:27 AM
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great input 70f100 !!!

thanks for the help !
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