10 Speed Trans vibration issue

[GMCnexttruck]

I definitely will, but I'm starting to worry that my dealer is too incompetent to troubleshoot it. they tried to tell me yesterday that they didn't notice anything, and I've been watching Fordpass to see if they're actually putting the miles on it that it will take, and they didn't even put 10 miles on it even after i talked to this service advisor for a good 5 minutes trying to explain the issue and what they'd need to do to replicate it.

I wish I had a dealer closer than this one. There is a severe communication problem between the SA's and techs with the different SA's I've dealt with. My SA on this one is apparently out on vacation this week, and so I went over everything with the person covering for them, and it's almost like the original SA just ignored me and put some generic one-liners down in the description. They've had the thing for a damn week and the only thing they've done with it is replace the headlamps and change the oil.

In any case, supposedly they're going to have a porter drive it around for a while and hand it off to the tech. We'll see what happens.

That's really bad service. In my experience, no Service Tech or Advisor will go on the highway. They just run about 10 mi or so in the vicinity of the dealership. I called Ford Customer Service today. They called the dealership, gave me a case #, and told me to call before leaving the Service Dept. Next Monday, I plan to do just that if I'm not making any progress. A local independent mechanic told me to demand to meet with a Ford Regional Rep if the dealership gives me the runaround. We'll see. Thanks for updating your progress.

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[GMCnexttruck]

It’s the next time you’re driving and you get up to your 62 mile an hour, do this.

Downshift the transmission the eighth gear. Hold your speed at where this normally does the shutter or vibration whatever you wanna call it.

See what happens

Today I did just that. At 68 mph, the vibration was evident so I downshifted into 8th gear. The RPM's went from about 1800 to about 2200. The vibration was constant. It never stopped or changed. I then shifted to 9th then 10th. No change. What is your conclusion?

 

[Gros Ventre]

Today I did just that. At 68 mph, the vibration was evident so I downshifted into 8th gear. The RPM's went from about 1800 to about 2200. The vibration was constant. It never stopped or changed. I then shifted to 9th then 10th. No change. What is your conclusion?

It's the propeller shaft...

 

[GMCnexttruck]

Front or re

It's the propeller shaft...

Front or Rear shaft on a 4x4? What makes you think that and how would I check for that underneath the truck?

 

[GMCnexttruck]

Front or re

Front or rear shaft on a 4x4? What makes you think that and how would I check for that underneath the truck?

 

[Gros Ventre]

Front or re

The front shaft would likely only produce that noise under power. Were you in full time 4WD? You'll need to pull the rear propeller shaft and have it checked for balance. While its out you can drive in 4WD on the front axle. You'll need to put a plug in the transfer case to prevent leakage.

 

[GMCnexttruck]

The front shaft would likely only produce that noise under power. Were you in full time 4WD? You'll need to pull the rear propeller shaft and have it checked for balance. While its out you can drive in 4WD on the front axle. You'll need to put a plug in the transfer case to prevent leakage.

I see. No, not in 4WD. Only driving I do at 68mph on a highway is 2WD. I'll run 4WD when the snow season starts when I go north, but not at that speed. The general consensus on this thread seems to be drive train components and not the transmission. Thanks for your input.

 

[Paul Neubauer]

I have my truck back temporarily because they want some miles put on it and then dropped off at the dealership as soon as the headlight problem occurs. As far as the vibration issue, it appears to be gone after a bunch of work was done. The rear axles were replaced again to the new updated style, the tires were rebalanced and rotated, the alignment was done again and they performed a fuel system cleaning. Not sure what the cause of the vibration was but it is gone.

 

[GMCnexttruck]

I have my truck back temporarily because they want some miles put on it and then dropped off at the dealership as soon as the headlight problem occurs. As far as the vibration issue, it appears to be gone after a bunch of work was done. The rear axles were replaced again to the new updated style, the tires were rebalanced and rotated, the alignment was done again and they performed a fuel system cleaning. Not sure what the cause of the vibration was but it is gone.

Thanks for your reply. Good to hear that you have a dealer willing to serve their customer and that your vibration issue is gone. I too just got my truck back from a 2nd Ford dealer. They said they attached a meter to the seat frame and attached it to an analyzer to measure vibration frequencies. Said it was the tires and road forced balanced again. I saw more wheel weights attached than from the last dealer service shop balance. It's about 95% better. I'll drive it for a while and reevaluate.

 

[JCsTruck]

Check your rims and tires for runout. I had several bent rims and poor quality tires on my 2014 F-150 from Firestone that caused similar issues on mine. I replaced the rims with new ones and put Michelin tires on, and I have no more vibrations at any speed. Also check the U-joint connection at the yolks. It seems like thread locker can get caught between the U joint cap and the yolk, which doesn’t allow it to seat fully and can create these vibrations.

 

[GMCnexttruck]

Thanks for your input. Service Mgr said the vibration analyzer is not all knowing but guides you in the right direction. I believe the drive shaft/u-joint may still be the issue as you state if not slightly out of balance. It stops when I left off the accelerator. Vibration is very slight now since the Road Force Balance was done properly. RFB is supposed to rule out bad tire and wheel integrity as well if done properly. So wheels and tires should be OK? Gut feeling, this Service Mgr seemed trustworthy. I don't believe the selling dealer service shop did a proper wheel balance.

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