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[izzy]

Had a weird vibration at 55mph, truck refused to accelerate, I finally put my foot in it and it kicked down to 5th.. after at least like 10 seconds of vibrating and zero forward acceleration. Weird...

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[ctngo82]

Has anyone else had a vibration/rumbling in their truck that was confirmed to be something other than wheels and tires?

I need to get this fixed so I can go snowboarding soon!

My automatic 24 TRD OR developed a weird vibration at 9700mi and I'm going back to the dealership on Tuesday for the second time after opening a case with Corporate Toyota - the first tech test drove it with me and only said "it's a truck, it's not supposed to be smooth".

It feels like I'm driving over rumble strips, or a tire/wheel is extremely out of balance. But just in the rear half of the truck.

My truck doesn't fall under the transmission recall either.

Details:
Started suddenly at 9700mi.
Speed dependent, 20-40mph, worse on decel/coast. No change when I shift manually to different gears.
Not in the front end - felt through the seat and chassis only.
Not the engine - no change when I shift to neutral while coasting.
Not the front driveshaft/diff - no change in 4wd.
Not tires/wheels - no change when I swap back to stock, or rotate to different positions.
Not the tonneau cover or bed mat - removed them.
No change with 500lb loaded into the bed, squatting the rear end ~1.5".

My thoughts are that it's either the transmission, rear driveshaft, or rear diff.

Watch this video maybe this is the problem.

 

[MT-Taco]

Watch this video maybe this is the problem.

That is easy to diagnose. After installing a lift is when it starts to be a problem, if it goes away with 4X4 engaged it’s most likely the needle bearing. I replaced mine but from what is being described I doubt it’s the needle bearing.

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