gregsf150stx

Its just the "harmonics" of a truck suspension is all you'll ever hear.

If so, why doesn't a '17 Titan and '17 Ram have the same vibrations.

'17 Silverado is worse.

iknfixit

What brand tires in common? Mine are Goodyear adventure 275-55-20. I had balanced at dealer at 4000mi and my fav tire place at 10,000 mi. 2.5 oz off on one and .5 oz on the rest. Still does it around 67 mph and mid to high 70's I think it's a tire out of round but can't pinpoint. I'm fixn to go on an 800 mi round trip in a week or so and thinking about switching the wheels and tires off wife's expy for the week. 275-55-20 hankook dynapro.

vtn98

Have you tried rotating the wheels front to back to see if the vibration changes at all?

mgullison

Just to chime in; I'm in the same boat.

My vibration started after about 4000 km on the odometer - 2017 F150, 3.5L Ecoboost, 10 speed trans., Super Cab.

I had it to the dealer twice; balanced tires, road force balanced, replaced tire, vibration analyzer road tested... The vibration is still there. Shop foreman speculates that the low RPMs in 10th gear cause a mechanical chug, but I gear down in manual mode and it's still there.

The vibration is noticeable enough, that, if I hum with my mouth, it will oscillate my humming sound...

I contacted Ford Canada; "our engineers are looking into the matter and will release information to the dealerships/technicians", etc.

This is my first Ford and likely my last. It's a beautiful truck, awesome power plant, but man, $55k for a vibration/wobble when driving... WTF?!

Camilo Vega

I had recently new rims and tires installed but I still have the vibration had the drive shaft replaced and balanced and alignment down 3 times what should I have done next since I purchased the truck in 2016 it now has 46k and it’s getting worse I think

daczone

SOLUTION 40 MPH Vibration:
(2019 F-150 less than 1000 miles on it).

Truck has been to 2 Dealers who don't want to do anything about this vibration. I crawled under the truck and low and behold, the pinion angles are not right.
I measured 3.85 degrees at the transmission and 1 degree at the rear end. With operating angles of 0.8 degree at the transmission (Driveshaft is at 4.65 degrees ) and 3.65 degrees at the rear end.

From SPICER:
RULE 1: UNIVERSAL JOINT OPERATING ANGLES AT EACH END OF A DRIVESHAFT SHOULD ALWAYS BE AT LEAST 1 DEGREE.

I'm paying $135 on Saturday to take it in to a driveline shop to have 2.5 degree shims installed which will get things back to within 1 degree.

If you have a vibration, measure yours. I didn't use a cell phone but a digital inclinometer.

maco

I'm with you on your diagnostics....I'm on my 3rd new driveshaft on 3 different truck years.... All my trks were used S/cabs or S/crews & I inherited my vibrations!! as of right now I'm waiting to put in a 2014 used
shaft in my 2013 !! (freshly balanced by a spicer shop) we will see shortly!!
Excessive run-out seems to be a big issue in past years!! & nobody in above posts seem to know it should be eliminated as a problem source.....(dealers especially)
Have had many LT tires that shops can't balance properly...(excessive weights on @ least 1 tire) Their diagnostics really suck as well...) (many diff. shops used)

Plz post your results.......Especially where the shim were put etc.
I'm sure it will/might help a lot of owners with this problem....I will do the same by next week !! Thks & Good Luck!!

acdii

Same with my 2016. I determined it was pinion angle based on empty/loaded conditions. The vibrations were reduced when there was 1000 pounds in the bed. The dealer shimmed the rear axle which reduced the vibrations, but didn't eliminate them. I have since found out the tires were the rest of the vibration issues because I have the wheels and tires on my 2018 right now. I can change how the truck vibrates by rotating the tires fore and aft so I know my tires are the problem. The tires that came with the truck also are causing a vibration, had them road forced(as well as the ones on it now) and the RF is more than 10 pounds on a couple tires. For a smooth ride in the F150 they need to be less than 10 pounds or you will feel them. The tires on now are close to 30, and causes vibs starting just under 45 up to 58 MPH. The other tires between 52 and 57 MPH. Driveshaft has been replaced, it had evidence of being dropped before it was installed, and the pinion angles are correct.

Another source of vibrations can be the front differential when not in 4WD. The pinion backlash on some is not set correctly and causes abnormal wear, and if the IWEs stick it can cause the pinion to work itself loose and shake, this can be felt at lower speeds, especially while slowing down. Learned all this on the POS 2016.

daczone

Went to yet another dealer.... Drove 2 BRAND new F150's includes one EXACTLY like mine, neither of these had the vibration issue.

According to Ford's parts department, Ford doesn't make a 2.5 degree shim. I have purchased a set from Amazon ($18) and will be installing them this next weekend. I spoke to a service mechanic and I don't want to make a bold statement here, but I will say the 3 Ford service tech's that I have talked to are nothing more than parts replacers. This is a DESIGN FLAW and thus would require the entire axle to be replaced to fix the issue. My guess is that Ford has a JIG in their axle assembly plant that is out of spec and is welding the leaf spring plates on 1/8 off which is causing some vehicles to leave the factory with this problem. They probably have multiple jigs producing axles which would be why all trucks aren't doing this.

Pinion Angle is HOT ROD 101, anyone that has done a motor swap, rear end swap knows about this. The Ford Service Tech's I have talked to (at 3 dealerships now) have no idea what I am talking about. But if you scream loud enough they will replace your driveline, tires, wheels etc.

I am hoping this post helps those out there seeking for answers. Yes if I could do it again I would have bought a F-150, just not this F-150.

David Batey

Any updates on the shimming?