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I can't envision what it could be a bumper for, it appears that the differential would contact the frame long before it would.
My friend's old Land Rover Discovery has something that looks similar mounted next to the transfer case. Except it's a steel wheel and mounted the other way, pointing down at the ground so if you're driving over a large rock it'll keep your case from getting high sided on the rock.
 
Eastsidebike's "Damper" sounds like a better name, to help keep driveshaft noise from transferring to the unibody since the new driveshaft fix no longer uses a giubo that perhaps served the same purpose.
 
Just so you all know. Mines a 2015 T-250 low roof, 130" wheelbase, 3.5 EB, with the 3.31 limited slip.
put that info in your forum signature so it shows in every post you make.

in the upper right corner of all forum pages, next to the log in/log out tab, is a tab that says "user CP" click on that tab, then click on the tab that says "edit signature" on the left side of the page, then type in your van info.

i did a search of the forum for info about signatures, but this is all i found, it is not much but at least it should give you a better idea of what a signature is.

http://www.fordtransitusaforum.com/...lp/49922-why-does-my-signature-disappear.html
 
My Jan 2015 build 350 wagon has the flange but nothing on it either. I can't envision what it could be a bumper for, it appears that the differential would contact the frame long before it would. LWB 3.7 engine/3.73 ratio, 9000#GVWR
That little rubber bumper is not going to dampen anything since it's mounted on a massive Differential housing
with a weight 100's of times of that the bumper.
 
That little rubber bumper is not going to dampen anything since it's mounted on a massive Differential housing
with a weight 100's of times of that the bumper.
I assumed it was cast iron, not rubber. With maybe a thin rubber liner? Kinda looks like harmonic balancer construction. Guessing here - maybe just enough to kill the specific resonance frequency of complaint? Not dampen everything? If not, what's the purpose of the thingy?
 
My question is why wouldn't it be on all models and configurations? Ford certainly didn't put one on my van because it looks good
Great question. I'd love to get one in my hands to see if it makes a difference on the thrum or not.
Has anyone identified a part number for it?
 
That makes sense to me. My question is why wouldn't it be on all models and configurations? Ford certainly didn't put one on my van because it looks good. Ecoboost? 3.31 limited slip?
I have the EB and 3.31 LSD and no issues. Maybe it's poor manufacturing precision where an occasional individual drivetrain vibrates but most don't. So most don't need the damper. I should go see if I have the damper.


Bigger one: http://www.popularmechanics.com/tec.../a14564/the-121-story-tower-that-never-sways/

If they can get something that big to not sway, surely Ford can do something about driveline vibration.
 
I assumed it was cast iron, not rubber. With maybe a thin rubber liner? Kinda looks like harmonic balancer construction. Guessing here - maybe just enough to kill the specific resonance frequency of complaint? Not dampen everything? If not, what's the purpose of the thingy?
Whatever it is made of or called, it does not kill the Drone noise on my Transit going 69MPH in 6th gear with engine turning at
about 2200 RPM's.
 
Eastsidebike's "Damper" sounds like a better name, to help keep driveshaft noise from transferring to the unibody since the new driveshaft fix no longer uses a giubo that perhaps served the same purpose.
Your ignoring the fact that my 2015 T250 that does not have the new U-joint fix HAS the so called Dampener.
I still have the GIUBO or technical name "Flex coupling".
 
@;
I assumed it was cast iron, not rubber. With maybe a thin rubber liner? Kinda looks like harmonic balancer construction. Guessing here - maybe just enough to kill the specific resonance frequency of complaint? Not dampen everything? If not, what's the purpose of the thingy?
I am going to take the F.... thing off and see/hear/feel what **** happens.:D
 
After writing the posts above, I went under my van and agree that it is NOT rubber but metal.

I describe it as a balancing device not a dampening or bumper type device.
 
I'll order one and try it - K4Z-5A669-A Pinion Nose Damper Kit
According to Ford, "New pinion nose damper may appear similar to the
original (if equipped), but the dampening characteristics have been changed."

This comes from the last page of an interesting read:
https://static.nhtsa.gov/odi/rcl/2017/RCRIT-17V446-6431.pdf
 

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I have the infamous THRUM and I dont have that damper either. I might try to add it to mine too, maybe it will do something. That part # JK4Z-5A669-A I think is for the kit(Damper and bolts) if you want just the damper CK4Z-4A263 -C for single real wheel -D for dual rear wheels, it seems to be a lot cheaper. Only ford would charge $30 for three bolts.

15' 250 cargo, medium, medium, eco boost, 3.73 limited slip
 
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