Help me solve my vibration issue!

[tacorancher]

His trans was the issue, right?

I have that fear for my truck too.

Yeah

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[Gear_yyc]

What I did on my old truck when it developed a vibration was I downloaded a free vibration recorder on my phone. Then I drove the truck at the speed it was most pronounced (in my case, 105km/h). I compared the frequency of the vibration to the various rotating parts on the truck. In my case, the frequency of the vibration aligned with the rotational speed of the driveshaft. Basically, you can determine: Is the vibration before or after the differential? And is the vibration before or after the transmission? That helped narrow it down. In my case, it was clear that my driveshaft was unbalanced.

 

[Yotota]

What I did on my old truck when it developed a vibration was I downloaded a free vibration recorder on my phone. Then I drove the truck at the speed it was most pronounced (in my case, 105km/h). I compared the frequency of the vibration to the various rotating parts on the truck. In my case, the frequency of the vibration aligned with the rotational speed of the driveshaft. Basically, you can determine: Is the vibration before or after the differential? And is the vibration before or after the transmission? That helped narrow it down. In my case, it was clear that my driveshaft was unbalanced.

Yes!

This is what I'm going to try today. I didn't even think of that idea until @MT-Taco shared an app on the previous page.

I think this will definitely tell me if it's a diff/axle/hub issue, or trans/t-case/driveshaft issue.

 

[MT-Taco]

What I did on my old truck when it developed a vibration was I downloaded a free vibration recorder on my phone. Then I drove the truck at the speed it was most pronounced (in my case, 105km/h). I compared the frequency of the vibration to the various rotating parts on the truck. In my case, the frequency of the vibration aligned with the rotational speed of the driveshaft. Basically, you can determine: Is the vibration before or after the differential? And is the vibration before or after the transmission? That helped narrow it down. In my case, it was clear that my driveshaft was unbalanced.

Did Toyota rebalance it? Or get you a new one?

 

[Yotota]

I calculated the wheel/axle and driveshaft rotational frequencies at certain wheel speeds. Then I did a bunch of vibration data logging with the "Resonance" app on my way home from work.

There was zero correlation between frequency and wheel speed, driveshaft speed, or even engine speed. The amplitude (intensity) of the vibrations were still worse in the 30-35ish mph range.

I'm honestly more confused now, and leaning towards transmission issues.

 

[Gear_yyc]

Did Toyota rebalance it? Or get you a new one?

That was on my Avalanche. It was old and I didn't use it a lot, so I just put up with it lol.

 

[Gear_yyc]

I calculated the wheel/axle and driveshaft rotational frequencies at certain wheel speeds. Then I did a bunch of vibration data logging with the "Resonance" app on my way home from work.

There was zero correlation between frequency and wheel speed, driveshaft speed, or even engine speed. The amplitude (intensity) of the vibrations were still worse in the 30-35ish mph range.

I'm honestly more confused now, and leaning towards transmission issues.

Can you consistently create this condition? Like it will happen every time you are coasting at 30-35? If you can re-create it easily, ask the service advisor at your dealer to send a tech with you as a passenger so you can demonstrate it. The original tech that test drove it probably didn't experience the condition you're describing.

 

[Yotota]

Can you consistently create this condition? Like it will happen every time you are coasting at 30-35? If you can re-create it easily, ask the service advisor at your dealer to send a tech with you as a passenger so you can demonstrate it. The original tech that test drove it probably didn't experience the condition you're describing.

Yeah, the first Tech was patronizing and immediately dismissive when he drove it with me.

I have an appointment with the QC Supervisor this morning where I plan to drive it to recreate the issue.

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