Shudder/Vibration Low speed turn, power

[Henryh8r]

Hello,
I searched around before posting this. I found some info on the F150 sites and some Expedition but all older models/gen. This just started whether in forward or reverse it shudders when turning and applying power, low speed. Parking maneuvers mainly. 55k miles so close to powertrain warranty if that would even apply (not likely in my experience).
Just started and I hoped there was some intel here before I get bent over at the local (Denver) dealership for yet another $120 diagnostic fee. I am about out of fun tickets with the ol Expedition...

2016

 

[crector080862]

Well if it's doing it when it's turning in Maneuvers at low speeds kind of sounds like your four wheel hubs are locked in place or partially locked in place to me

Sent from my SM-G892A using Tapatalk

 

[07xln]

Sounds like the same thing that just creeped up on my 2017. When pulling in or out a parking spot or low speed turns, like you mainly parking maneuvers, the steering will get stiff and I get a nasty vibration.

 

[coolzzy]

That sounds like the beginnings of epas (electric power assisted steering) failure. Warranty should cover that, and inside the 60k mile warranty there should be no diagnostic fee if problem is found. The unit is not serviceable and must be replaced as a single unit and programmed by the dealer.

 

[CrAzYJoe85]

Make sure you 4wd is disengaged I bumped it one tim from 4A to 4H and it did that also there is no reason to run it in 4A or 4H during summer months unless you are off road and the time of the switch

 

[Henryh8r]

It is off, that was my first stop. Thank you

 

[East-TN]

Any update? I’m at 54,000 miles and starting to get a slight shudder/vibration at low speeds when turning left or right...seems to only happen in 2H...if I select 4A no vibration.

 

[MyExpedition2016]

I’m bringing my 2017 to the dealer on Monday for this exact same symptom.

 

[East-TN]

I’m bringing my 2017 to the dealer on Monday for this exact same symptom.

I've researched this symptom on several Forums.

To start, I'm going to change the fluid in the rearend and add the required Friction Modifier for the limited-slip. I'll see what effect this has on the shudder.

Please post back what the dealer tells you on Monday.

Maybe between the two of us we can help determine what's going on


Thanks.

 

[East-TN]

Just a heads up...if you take your vehicle to the dealer for this issue, be aware what the Owner's Manual (page 171) says:

"LIMITED SLIP DIFFERENTIAL (If Equipped)
This axle provides added traction on slippery surfaces, particularly when one wheel is on a poor traction surface. Under normal conditions, the limited-slip axle functions like a standard rear axle. The axle may exhibit a slight noise or vibration during tight turns with low vehicle speed. This is normal behavior and indicates the axle is working."

Especially note the 'normal behavior' reference.

 

[Munkiebunz3]

I had this exact experience. The service advisor said that they replaced the front diff. They separated the ticket into two different ones with one for the power train warranty work & inenfir customer pay. I did not get the copy of the warranty work ro so I can't confirm. Looking under the truck did not reveal a new pumpkin.

 

[East-TN]

I had this exact experience. The service advisor said that they replaced the front diff. They separated the ticket into two different ones with one for the power train warranty work & inenfir customer pay. I did not get the copy of the warranty work ro so I can't confirm. Looking under the truck did not reveal a new pumpkin.

To confirm...you had the shudder/vibration in 2H mode only? When you selected 4A the shudder went away?

 

[Munkiebunz3]

I did have it in 2H. I did not check for 4A function. As long as I have a warranty & I'm not getting paid for my diagnosis, I don't feel like spending the time with the dealer that doesn't listen to me anyway. Here is a different story. I'm doing diagnostics when things go wrong so I can help people here.

 

[East-TN]

I did have it in 2H. I did not check for 4A function. As long as I have a warranty & I'm not getting paid for my diagnosis, I don't feel like spending the time with the dealer that doesn't listen to me anyway. Here is a different story. I'm doing diagnostics when things go wrong so I can help people here.

Since you didn’t get a copy of the warranty work, are you saying your invoice (which you paid for) is the replacement of the front diff? Odd they wouldn’t give you a copy of the warranty invoice.

 

[Munkiebunz3]

@17LimitedExpy the invoice I got was only the cp stuff I paid for with a note on my driveline complaint to "see ro#xxxxxx for resolution" and they never gave me that one.

 

[powerboatr]

mine does this when we back out of the driveway and turn sharp onto the road, its gravel, asphalt so i get a tire slip, jump, grab.
its the limited slip i would guess,
then add in my drive is 2" taller than the street and the front wheel is turned pretty sharp and it drops and creeks a bit, as it looses traction and then rolls across the gravel stuff.

 

[Munkiebunz3]

@powerboatr his happen in parking maneuvers so I doubt he's mashing the pedal to quickly merge with the parked cars & triggering the limited slip or traction control.

 

[powerboatr]

i may have not been clear, mine does it at backing out of the drive, which is slow. i get noise and groans as the wheels transit the three different traction of gravel, asphalt and concrete, plus a 2" height difference

 

[JExpedition07]

It sounds like the beginning of epas failure like Coolzzy said. The electric steering rack often inevitably has to be replaced. Pretty common failure if you look over at the F-150 forum, often around 100k miles.

 

[MyExpedition2016]

Finally got it back from the dealer and the rear end grinding is no more. They replaced the clutch pack in the rear differential. this is the limited slip components from what I've read and happens fairly often. Under warranty - $0!