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Ok I've solved my 2016 Transit T-350 Driveshaft Drone Noise! Maybe not the same as everyone else that's on the site, but my keep getting louder and louder so I finally took it back to the dealer. I had a bearing that went out our the rear end. I had to have the rear end rebuilt for $1566. Unfortunately for me the van had 63,000 just out of the engine drivetrain warranty! So if you have less than 60K on your van do wait TAKE IT BACK to the dealer ASAP, you might save yourself some money.
 
I've got a 2015 medium roof 3.7 gas motor medium height. To your point the same noise can be heard in the 150 in the transit. the limited slip differential makes a humming droning sound while turning Corners slowly. This is a problem for both vehicles because they have the same 9.75 inch rear end The Limited slips are bad and Ford replaced mine under warranty the noise has stopped. You have a 2018 model I just wonder if Ford has corrected the limited-slip issue.
 
My drone specs

2018 MR 3.5 EB 3.10 LSD
Noticed a droning/low hum sound before 200 miles were on it. It happens between 40-45 mph only when there is slight acceleration of the engine (light pressure on the pedal). Take your foot off the gas it goes away. Step harder on the gas on the EB engine shoots you quickly past the "drone zone". I now have close to 4k miles and this issue is still present. One thing I have noticed, but can't say it's always true, is when I accelerate from a stop with one tire on the pavement and the other off (like turning out of my dirt driveway onto pavement) the "drone zone" can either almost completely go away or come back as load and bothersome as always. Maybe something to do with the LSD???
 
Yeah Man! To much LSD.

I am leaning toward an exhaust drone issue for the 45-50MPH I have.

I can even hear it to a lesser degree while in park and reving the engine slowly through the RPM's.
 
Follow-up: This situation has been getting worse. I asked a customer of mine that I trust if he could isolate the noise and fix the problem. His only option was to confirm the driveshaft is within spec. So we sent out the d/shaft for testing, they corrected it and sent back, reinstalled the D/shaft and the noise was still there. Now we don't know what to do. I did notice a few things that are not correct based on the TSB, there was no shield mounted to the transmission as stated on the enhanced TSB. The pinion damper looked to be untouched. My gut says the technician never changed the pinion damper.

The TSB clearly states, "new damper looks the same as the old damper" I bet the Techs assume its the same toss new one in the garbage because Ford gives them 1hour for the entire process and they are pressed for time.

When I got the van back from Mahwah Ford the check engine light came on the day after. I could hear an air leak under the van sounded like an exhaust leak. The scanner said "EVAP system leak", cleared the code it came back every few weeks. This morning I took a good look under the van and noticed they neglected to re-connect the evaporation canister hose. Total slackers, my guess is the folks with droning noises are probably victims of technicians with HEAD UP ASS syndrome.


FORD TRANSIT = VIBRATION BOX
 
Total slackers, my guess is the folks with droning noises are probably victims of technicians with HEAD UP ASS syndrome.
yeah, that's quite possible.

The damper is very accessible. It would think it has a different part number than the old one. If it's still the old damper, it should be (cheap? and) easy to change yourself rather than risk the dealer monkeys messing with your van again.
 
My 2017 150 3.7 130"wb with 12k miles has a noticeable drone at 75mph. The driveshaft recall was done before delivery and has all U joints. About 5K miles ago I noticed a vibration and the dealer balanced the driveshaft with a couple of hose clamps and fixed the vibration but still has the drone.
 
2017 Transit XLT 350

2017 XLT 350 12 pass. van, 3.7 with 3.7 axle. MFD date: 3/17.

Drone most noticeable @ 50 - 60 MPH. Affected by engine RPM. Tried manually shifting @ 55 MPH and drone intensity changed when I shifted into lower gears.

Hope this helps.

Jim Thompson
 
2017 XLT 350 12 pass. van, 3.7 with 3.7 axle. MFD date: 3/17.

Drone most noticeable @ 50 - 60 MPH. Affected by engine RPM. Tried manually shifting @ 55 MPH and drone intensity changed when I shifted into lower gears.

Hope this helps.

Jim Thompson
I have a silly question.
If the drone changes with transmission gear, not road speed, how would that be related to driveshaft?
The shaft should be turning at the same speed if the MPH is the same, no matter the engine gear
 
I have a silly question.
If the drone changes with transmission gear, not road speed, how would that be related to driveshaft?
The shaft should be turning at the same speed if the MPH is the same, no matter the engine gear
I already posted this as why I do not believe that the drive shaft in it self is causing the DRONE noise.

What I did was set the cruise control at the point where the Drone was the worst and followed that by
switching to Manual shift mode down to Fifth from Sixth gear and the Drone stopped.
No change in the Drive shaft or wheel speed so it has to be something else.

It is more likely an exhaust Harmonics drone, Tranny/Torque converter drone, or combination in my opinion.
 
Humming sound when turning at low speed

I've got a 2015 medium roof 3.7 gas motor medium height. To your point the same noise can be heard in the 150 in the transit. the limited slip differential makes a humming droning sound while turning Corners slowly. This is a problem for both vehicles because they have the same 9.75 inch rear end The Limited slips are bad and Ford replaced mine under warranty the noise has stopped. You have a 2018 model I just wonder if Ford has corrected the limited-slip issue.
I have this noise too. Humming droning sound when turning at low speed, like under 10 mph. I have a 2017 150 MR wagon 130”WB, 3.5 ecoboost with limited slip differential. 25,000 miles on it and am pretty sure it’s been making this sound from day one. Ive brought it to the dealership twice and they can’t figure it out. They acknowledged that the sound exists but have no idea what is causing it. Should I ask them to replace the LSD?
 
Signed up for this site a while back to monitor this discussion. I was having the droning at 40mph and above, more pronounced under moderate engine load, on a 15-pass. 2015 XLT 350 3.7L since the day we bought it this February. Downshifting the transmission into 5th gear immediately silenced the droning.

Coming upon the expiration of the 60,000 mile powertrain warranty, I brought the van in to diagnose about a month ago. They confirmed the noise and performance and suspected torque converter or planetary gear failure. A transmission pan removal confirmed that the torque converter had been the culprit with clutch material found in the pan. Further teardown of the transmission revealed the TC had overheated and was in the process of disintegration. All in all, they had the vehicle a little over a week to diagnose, order parts, and perform the repair. The labor summary is attached to this post for reading reference. Note that there was some other fairly intrusive work necessary for removal of the transmission.

As a second owner of the vehicle, I have no basis if the overheating was a result of driving habits or perhaps a common issue with the transmission. Given the multitude of posts in this thread lamenting a similar issue, I'm inclined to the latter.

I hope this is helpful to anybody with similar issue. I am happy to report that after a month or so of driving, the transmission is functioning correctly with no droning noise as before the repair was performed.
 

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OK, I recently switched from my summer tires (stock Vanco's on Ultra Toil wheels) to my winter tires (225/75R16 Arctic Grabber's on the stock aluminum wheels). Result: the droning I had at ~42 mph has decreased significantly but has moved to about ~52 mph. Making me think it's all drive train harmonics and all the different variables of transmission, drive shaft, rear ratio, limited slip, wheel size and wheel balance.
 
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