10 Speed Trans vibration issue

[ttnuagmada]

going through this exact thing. mine is at the dealer right now. requires driving at highway/interstate speed for a good 30+ minutes before it starts doing it. I don't think it's the transmission though. I think it's either the driveshaft or the u-joints. It also does it it any gear. I even had it in 6th doing 80mph at still felt it. If I set the cruise at 80, I can feel it shaking if I'm going up a hill and then it calms down going down a hill.

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[GMCnexttruck]

I'm not crazy! Thanks for your reply. Yes, that's the issue! Once it starts, it continues at lower speeds as you stated. My truck has a Mfr date of 12/24 built at the Kansas City plant. Yours? Very well could be driveshaft and/or U Joints. Trans shifts/downshifts smoothly. Torque converter might be the issue though? Feels like driving over wash boards when it starts. Tired of Ford saying,"That's normal." Filing a complaint with Ford Motor Co tomorrow for what that's worth.

 

[PowerBoostSoCal]

I wonder if you have a defective u-joint (s) and/or driveshaft is out of balance. Just throwing thoughts out there.

I did have the drive shaft replaced on my '23 Lariat ... seemed to fix the issue. It was noticeable at highway speeds under hard acceleration. My '25 does not have any vibration issues.

 

[GMCnexttruck]

I did have the drive shaft replaced on my '23 Lariat ... seemed to fix the issue. It was noticeable at highway speeds under hard acceleration. My '25 does not have any vibration issues.

That's good info! I'm beginning to believe that's where the problem lies. I have an appointment for next Monday 7/28 at a different dealer. I appreciate your input.

 

[ttnuagmada]

I'm not crazy! Thanks for your reply. Yes, that's the issue! Once it starts, it continues at lower speeds as you stated. My truck has a Mfr date of 12/24 built at the Kansas City plant. Yours? Very well could be driveshaft and/or U Joints. Trans shifts/downshifts smoothly. Torque converter might be the issue though? Feels like driving over wash boards when it starts. Tired of Ford saying,"That's normal." Filing a complaint with Ford Motor Co tomorrow for what that's worth.

mine's a 21. It actually didn't start this until about a year ago. I don't really have other symptoms that would suggest a torque converter issue I don't think. To me it just seems like something in the driveline getting out-of-round once it heats up. Like yours, it will be noticeable at any speed once it starts happening, but just driving around town and getting the transmission hot isn't enough to do it, it's gotta be highway speeds for a stretch, and it feels the worst once I start getting above 70mph or so.

I don't know if it's related or not, but I also notice a low-frequency vibration type of noise if I brake hard from high speed that drops in frequency that I feel like is related. In my head it matches the idea that something in the driveline is wobbling.

 

[GMCnexttruck]

My truck's symptoms exactly, except for the high pitch noise. I can hear the turbos winding down tho when I come to a stop but that's normal. I have an appointment next Monday at a different Ford dealer. From your input and others, I think it's a driveshaft, U-joint related issue. Thanks again.

 

[Paul Neubauer]

My '21 has this annoying vibration also after driving down the freeway for 20 to 30 minutes. They rebuilt the transmission after finding it was destroyed but the vibration was the same afterwards. They also replaced a couple diesel injectors after they tested bad thinking the vibration was from the engine but it was still the same. I currently have them re balancing the tires and checking the alignment again but have doubts that will solve anything. The vibration is never present when first driving and seems to come on stronger in the evening when it is warmer outside.

 

[GMCnexttruck]

My '21 has this annoying vibration also after driving down the freeway for 20 to 30 minutes. They rebuilt the transmission after finding it was destroyed but the vibration was the same afterwards. They also replaced a couple diesel injectors after they tested bad thinking the vibration was from the engine but it was still the same. I currently have them re balancing the tires and checking the alignment again but have doubts that will solve anything. The vibration is never present when first driving and seems to come on stronger in the evening when it is warmer outside.

Yes, I know the feeling and have read F150 owners accounts with the same annoying vibration. I have a gas motor, 3.5L Twin Turbo which runs great. I started running Shell VTech 93 in it but that doesn't help. Was told it would help with computer module trying to decide which gear for best fuel mileage at lowest RPM's. I too went thru wheel road force balance but it's still there. Interesting that your trans was rebuilt and the issue remained. Makes me think it's drive shaft, U-Joint issue even more. Thanks for your input Paul.

 

[ttnuagmada]

My truck's symptoms exactly, except for the high pitch noise. I can hear the turbos winding down tho when I come to a stop but that's normal. I have an appointment next Monday at a different Ford dealer. From your input and others, I think it's a driveshaft, U-joint related issue. Thanks again.

It's not high pitched, it's really low pitched, like a rumble. but the sound frequency (Hz) drops with speed. I don't really notice it unless I brake moderately hard from a relatively high speed (60+). It kinda sounds like a subwoofer bass drop, except with a high frequency vibration wobble to it.

 

[GMCnexttruck]

Gotcha. Would you post an update when you get your truck back from the dealer? I'd be interested in how they handle the vibration issue. Thanks.

 

[Paul Neubauer]

Gotcha. Would you post an update when you get your truck back from the dealer? I'd be interested in how they handle the vibration issue. Thanks.

Did your truck have the recall to fix the underbody insulation fixed? They had to remove the driveshaft for this repair and mine had a vibration ever since.

 

[GMCnexttruck]

No recall received. Interesting the driveshaft is the cause in your case knowing it was removed. Hope Ford gets that fixed for you. I'm headed into the dealer next Monday. I'll post what they do next.

 

[ttnuagmada]

Gotcha. Would you post an update when you get your truck back from the dealer? I'd be interested in how they handle the vibration issue. Thanks.

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.

 

[Gros Ventre]

I believe that if the problem lay in the transmission itself, the transmission would have lunched itself by now. It strikes me the "somethings out of balance" is the key thought. U-Joints don't normally do this kind of thing when they fail unless grossly damaged. Go look at them, if damage isn't apparent move on (although they might still need replacement). Are you 4WD? if so take out the rear propeller shaft and go for a drive (in 4WD though you'll really be in front wheel drive). If the vibration goes away then somethings wrong with that shaft. Get it balanced. Remember, that shaft is spinning at the wheel rotation rate times the axle ratio, so balance makes a difference. That kind of out of balance comes on slowly and is only apparent when the propeller shaft is at higher rpms getting worse and worse the faster you go.

 

[ttnuagmada]

I believe that if the problem lay in the transmission itself, the transmission would have lunched itself by now. It strikes me the "somethings out of balance" is the key thought. U-Joints don't normally do this kind of thing when they fail unless grossly damaged. Go look at them, if damage is n't apparent move on (although they might still need replacement). Are you 4WD? if so take out the rear propeller shaft and go for a drive (in 4WD though you'll be in front wheel drive). If the vibration goes away then somethings wrong with that shaft. Get it balanced.

I hope it doesn't come down to me having to try that kind of stuff myself.

My transmission has never had any of the typical transmission issues I read about. I'm kind of thinking driveshaft, but I'm not sure why it would be 3 years before it started showing up. I had the underbody insulation recall done as soon as it was available, and that was 2-3 years before i had any symptoms. I'm definitely not hard on this thing. It's never left the road.

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