Clanks When Down Shifting

[Jim Shaw]

I have a new 2018 Expedition Limited.

After owning a few weeks I began hearing a clank noise when it downshifted from 5th gear to 4th gear.

Retuned to dealership for warranty repair.

Didn't fix it so will return it again this week.

Any ideas?

Thanks for your help.

 

[Breaker]

Ours makes a noise when you first put it in drive. It also makes this taping sound when you open up the door after it has been sitting. Like something is getting set up or something.

 

[aggiegrad05]

It also makes this taping sound when you open up the door after it has been sitting. Like something is getting set up or something.

Fuel pump.

 

[Jim Shaw]

Ours makes a noise when you first put it in drive. It also makes this taping sound when you open up the door after it has been sitting. Like something is getting set up or something.

 

[Jim Shaw]

After sitting in garage overnight I start the engine and wait a few seconds for the RPM to settle, put foot on brake and put it into Reverse. As soon as it engages I hear the clank. Don't hear it again until the fluids come up to operating temps. ?????

 

[16plati]

After sitting in garage overnight I start the engine and wait a few seconds for the RPM to settle, put foot on brake and put it into Reverse. As soon as it engages I hear the clank. Don't hear it again until the fluids come up to operating temps. ?????

F-150s have TSBs out for clanking during high gear downshifts

 

[Jim Shaw]

F-150s have TSBs out for clanking during high gear downshifts

Thanks for your response.

 

[Jim Shaw]

Fuel pump.

Thanks for you response.

 

[Breaker]

Fuel pump.

You think it's the fuel pump? Just from opening the door you think?

 

[aggiegrad05]

You think it's the fuel pump? Just from opening the door you think?

Yep. Someone that is far more mechanically minded than me will correct some of my details, but it was explained to me as follows:

The high-pressure fuel pump needs to be primed before operating. Rather than building that 2-3 seconds into the startup routine (which would cause extra delay after you press the "go button"), they have the pump prime when you open the door and is ready to go when you turn the vehicle on. That's also why it only happens after sitting for a few hours; if it's only been sitting for an hour or so, it won't make the noise because the pump is still/already primed.

My 2012 F150 did it as well, but it was a more electronic noise. My Expi sounds like something is cycling.

 

[Artie]

You think it's the fuel pump? Just from opening the door you think?

The tapping sound you hear is the fuel pump.

 

[aggiegrad05]

Someone also mentioned on the F150 forum that you can turn it off with Forscan...and sure enough:

Fuel Prime with driver door ajar
726-41-01 xxxx x*xx xxxx
0 = no fuel pump prime
1 = pump prime

(Again...this is for the F150, not the Expi, so don't go fiddlin' with your computers because I posted this)

 

[Breaker]

That makes me feel a little better about then I guess. I don't mind it, and don't really know why you would turn it off.

 

[Jim Shaw]

Someone also mentioned on the F150 forum that you can turn it off with Forscan...and sure enough:

Fuel Prime with driver door ajar
726-41-01 xxxx x*xx xxxx
0 = no fuel pump prime
1 = pump prime

(Again...this is for the F150, not the Expi, so don't go fiddlin' with your computers because I posted this)

 

[Jim Shaw]

Thanks for you response. Returning it to the dealership next Tuesday.

 

[Mad Oshea]

I have a new 2018 Expedition Limited.

After owning a few weeks I began hearing a clank noise when it downshifted from 5th gear to 4th gear.

Retuned to dealership for warranty repair.

Didn't fix it so will return it again this week.

Any ideas?

Thanks for your help.

U Joint!

 

[Jim Shaw]

Thanks for you response. Returning it to the dealership next Tuesday.

Dealership kept the car overnight and had me pick it up mid-afternoon of the second day.

They told me they had a TSB 19-2031 (I can't find it on the internet). It was about removing the driveline and lubricated the flange with "special grease."

Then they introduced me to "The 10 Speed Transmission" guy/expert. He said he deleted all prior information in the tranny computer. He then reprogrammed it. He told me it is an adaptive tranny; therefore, he drove the car many miles to "retrain" the memory bank. In the diagnostics he could see I was not coming to a complete stop when the car was in reverse before putting it into Drive and I had several episodes of not coming to a "complete" stop before accelerating again. According to him, this causes issues with the computer which can result in the rough down-shifts I was experiencing along with the clanking noise when it shifted. He advised me it will take a week or so to fully retrain the tranny to my driving style.

He also told me that if I ever have a question or want him to ride in the car for me to not even call the dealership for an appointment just come in and ask for him!

So far, the few times I've driven the car all is good!

I thank everyone who posted a reply to my thread.

 

[1955moose]

That's refreshing to hear a tech that not only knows what he's doing, but has customer service skills. Glad all is well.

Sent from my N9131 using Tapatalk

 

[Artie]

Dealership kept the car overnight and had me pick it up mid-afternoon of the second day.

They told me they had a TSB 19-2031 (I can't find it on the internet). It was about removing the driveline and lubricated the flange with "special grease."

Then they introduced me to "The 10 Speed Transmission" guy/expert. He said he deleted all prior information in the tranny computer. He then reprogrammed it. He told me it is an adaptive tranny; therefore, he drove the car many miles to "retrain" the memory bank. In the diagnostics he could see I was not coming to a complete stop when the car was in reverse before putting it into Drive and I had several episodes of not coming to a "complete" stop before accelerating again. According to him, this causes issues with the computer which can result in the rough down-shifts I was experiencing along with the clanking noise when it shifted. He advised me it will take a week or so to fully retrain the tranny to my driving style.

He also told me that if I ever have a question or want him to ride in the car for me to not even call the dealership for an appointment just come in and ask for him!

So far, the few times I've driven the car all is good!

I thank everyone who posted a reply to my thread.

Sounds like you have a great tech and dealership to get service from, that’s awesome!