Drive train Bump

Old 04-25-2019, 08:19 AM
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Join Date: Apr 2005
Location: New York
Posts: 879
Drive train Bump

2015 f150 3.5 eco boost , 6 speed trans, electronic locking rear. When I come to a stop, I can feel a bump in the transmission/drive train. I also experience this while driving and take foot off accelerator for a moment, when I re apply accelerator I get the bump or ‘slap’.
I can already envision the Ford Dealer experience on this problem. They’ll say they couldn’t reproduce the customer complaint. So I will have to drive the vehicle with mechanic. It is still under drivetrain warranty.
My question is, is this a common complaint on this transmission?
Old 04-25-2019, 09:14 AM
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Join Date: Jan 2007
Location: Vernon, NY
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There might be a pending service campaign on it. I'd inquire.
Old 04-25-2019, 10:04 PM
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Join Date: Mar 2000
Location: SE Florida, USA
Posts: 1,649
I'm not familiar with this particular trans, but this is a common complaint that has been around for years. It's caused by a dty slip joint in the driveshaft. Ford has a special lube just for slip joints.

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