Seat occasionally “rocking”?

[JExpedition07]

Lately it seems like when I hit the gas pedal maybe 1 in 3 times the seat back moves slightly back on me like something is loose. Seems when I hit the brakes it comes forward a hair and back when I hit the gas. I looked under there but don’t really know what I’m looking at. Any ideas?

 

[210M]

Yep, I've got the same problem. I did some research a while back and I think the most likely cause is some failed plastic bushings inside the lugs that ride on the worm gears that move the seat forward and backward. I just live with it, but it is annoying.

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[JExpedition07]

Yep, I've got the same problem. I did some research a while back and I think the most likely cause is some failed plastic bushings inside the lugs that ride on the worm gears that move the seat forward and backward. I just live with it, but it is annoying.

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Oof you are correct there it is annoying. Has it gotten progressively worse on you or stayed about the same?

 

[99WhiteC5Coupe]

Lately it seems like when I hit the gas pedal maybe 1 in 3 times the seat back moves slightly back on me like something is loose. Seems when I hit the brakes it comes forward a hair and back when I hit the gas. I looked under there but don’t really know what I’m looking at. Any ideas?

My 2015 Expedition Limited 4x4, purchased new, does this. It is very annoying. I have the Ford premium extended warranty and intend to have the seat mechanism fixed at my next service visit.

 

[Aspen03]

My driver seat has a very slight rocking to it under these same circumstances. Is this something serviceable or the entire seat neat replaced? I've installed seat tracks and motors in previous vehicles before so not scared to do it. Finding a seat that isn't worn is probably tough, from a used standpoint anyway for a 2nd gen.

 

[Shantheman73]

Same here. It rocks enough to annoy me but not enough to alarm me to do something about it. Lol


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[210M]

Oof you are correct there it is annoying. Has it gotten progressively worse on you or stayed about the same?

I've only owned my 2016 for about 7 months. Didn't notice it on my test drive. But once I adjusted the seat a few times, it became apparent. It hasn't gotten worse, but I thought that I would eventually get used to it... That hasn't happened yet.

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[07navi]

If these seats constantly rock you could take it out and have someone hold it while you try to get some movement out of it.

 

[Breetto]

Same here. It rocks enough to annoy me but not enough to alarm me to do something about it. Lol


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Same here.

 

[Boose]

my 2005 and 2017 both did this... VERY annoying. Based on what I could find, it seems to be play in the gearing of the power seats. If you put the load on the backside of the gearing it almost eliminates it. Try putting the seat in the location you want it, and very briefly bumping the seat back in the opposite direction. If you are setting the upright/decline angle for example, recline to where you want it, then very briefly "bump" the switch back towards the upright direction of travel. by putting the tension on the other side of the gear in the mechanism, there is far less play in my experience.

 

[JExpedition07]

my 2005 and 2017 both did this... VERY annoying. Based on what I could find, it seems to be play in the gearing of the power seats. If you put the load on the backside of the gearing it almost eliminates it. Try putting the seat in the location you want it, and very briefly bumping the seat back in the opposite direction. If you are setting the upright/decline angle for example, recline to where you want it, then very briefly "bump" the switch back towards the upright direction of travel. by putting the tension on the other side of the gear in the mechanism, there is far less play in my experience.

I’ll give this a shot

 

[Elvisinflorida]

Same in my 2004 EB.
When I got it a year ago with 74K miles on it, the seat setting for ease of entry/exit was set on. So every time the door was opened, the seat moved all the way back automatically, giving more room for entry and exit. Then on startup it would move forward to the memory position. I found it really annoying so I turned that setting off. But then I noticed the play in the forward/back position. I wrote it off as play due to wear on the mechanism from the years the former owner had the seat set for ease of entry/exit.
Anyway, I asked an experienced Ford mechanic about repairing the annoying seat play. He had no idea! So I'm putting up with it.

 

[07navi]

Mine was set on easy entry and still is but no rocking, I guess for those that rock the only solution is to replace the track........if you can buy them.

 

[Boose]

Mine was set on easy entry and still is but no rocking, I guess for those that rock the only solution is to replace the track........if you can buy them.

you can only imagine the frustration when I pulled off the lot in my brand new 2017 and felt the same rock as my 200K mile 2005 lol

 

[JExpedition07]

Shoutout to the Boose method, while it doesn’t totally stop it is less noticeable

 

[210M]

Shoutout to the Boose method, while it doesn’t totally stop it is less noticeable

Yeah, I agree. I played with the tilt a little bit, and it seems to have helped.

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[Boose]

Glad it helped!

I'm guessing a worm gear with tighter pitch would fix this issue but apparently the engineers didn't think of that yet...

 

[07navi]

Glad it helped!

I'm guessing a worm gear with tighter pitch would fix this issue but apparently the engineers didn't think of that yet...

There is a lot they didn't think of but there is a lot to think about. What bugs me is they often go years before correcting it.

 

[Shantheman73]

Shoutout to the Boose method, while it doesn’t totally stop it is less noticeable

Worked for me too! Not totally eliminated but close! Thanks Boose


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[jkayca]

Are the bolts that fix the seat to the floor nice and tight? I ask this because I had a slight rocking with mine a couple of years ago. My wife had lost her wedding ring down the side of the seat. The only way to get it was to unbolt the seat and lift it up. When I put it back I didn't tighten up the bolts sufficiently. This caused a slight rocking sensation when braking and accelerating. So I went back and re-tightened things and rocking motion hasn't happened since.