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Old 02-04-2020, 06:41 PM #1
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CV Axle Experts needed (VIDEO)

In my ongoing attempt to solve driveline vibrations, I'm down to CV's. Can anyone verify whether the slop/wobble on the driver side CV is normal? Passenger side seems tight. Also if I reach in and push up and down on the driver side inner CV there some up and down movement, not terrible, maybe less than a 1/16 inch. Passenger side no movement. Rattling sound in the videos is my skidplate.

Driver Side

Passenger Side
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Old 02-04-2020, 07:35 PM #2
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I don't think it's the CV.
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Old 02-04-2020, 07:36 PM #3
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I can see the bottom cover vibrating.
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Old 02-04-2020, 07:37 PM #4
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I don't see any issues with either side.

What kind of vibration are you feeling?
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Old 02-04-2020, 07:59 PM #5
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I have the infamous harmonic rhom rhom rhom vibration between 70-75mph (around 2100rpm) while accelerating. I can feel vibrations in the gas pedal and on the floorboard beneath my left foot only. There are no abnormal noises when accel, stopping, or turning. Its only vibrations at highway speed.

The wheel bearings seem fine, no play or noise. U-joints on the driveshaft maybe? The slight driver side CV wobble possibly?

I've replaced left and right front and rear suspension
Both LCA's
Both Inner and Outer Tie Rods
Swaybar endlinks and bushings
4x firestone Destination AT/2 Tires
Balanced and rotated twice, last being at Toyota
Alignment at Toyota.
Both Diffs, Trans, and Transmission drain and filled within the last month

Truck drives smooth otherwise. I've been researching this for a month, and throughout the forums, nothing has been conclusive on this harmonic accel vibration.
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Old 02-04-2020, 08:24 PM #6
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Ive heard some people have a sound from the front diff that goes away in 4wd. They end up replacing some bearing with a sleeve. Forgot what it was/called. Some 5th gens have the problem too.
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Old 02-04-2020, 08:34 PM #7
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Quote:
Originally Posted by SolRayz View Post
I have the infamous harmonic rhom rhom rhom vibration between 70-75mph (around 2100rpm) while accelerating. I can feel vibrations in the gas pedal and on the floorboard beneath my left foot only. There are no abnormal noises when accel, stopping, or turning. Its only vibrations at highway speed.

The wheel bearings seem fine, no play or noise. U-joints on the driveshaft maybe? The slight driver side CV wobble possibly?

I've replaced left and right front and rear suspension
Both LCA's
Both Inner and Outer Tie Rods
Swaybar endlinks and bushings
4x firestone Destination AT/2 Tires
Balanced and rotated twice, last being at Toyota
Alignment at Toyota.
Both Diffs, Trans, and Transmission drain and filled within the last month

Truck drives smooth otherwise. I've been researching this for a month, and throughout the forums, nothing has been conclusive on this harmonic accel vibration.
I question the tires.
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Old 02-04-2020, 08:37 PM #8
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Not the tires. This was happening on my old Toyo AT's. These Firestone's are brand new.
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Old 02-04-2020, 10:20 PM #9
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Quote:
Originally Posted by SolRayz View Post
Not the tires. This was happening on my old Toyo AT's. These Firestone's are brand new.
Front driveshaft then. Check the ujoints and slip joint for play. If none, grease the shit outta them.
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Old 02-04-2020, 10:44 PM #10
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The bearing in the diff mentioned above is the needle bearing in the front diff. ECGS sells the bearing and tool. Easy job. Plenty of write ups on how to do it.


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Old 02-04-2020, 11:48 PM #11
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Quote:
Originally Posted by xtremewlr View Post
Front driveshaft then. Check the ujoints and slip joint for play. If none, grease the shit outta them.
I'll be crawling under and checking those next weekend.
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Old 02-04-2020, 11:53 PM #12
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Quote:
Originally Posted by montijo505 View Post
The bearing in the diff mentioned above is the needle bearing in the front diff. ECGS sells the bearing and tool. Easy job. Plenty of write ups on how to do it.


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If you're talking about
TOYOTA 8" CLAMSHELL CV AXLE BUSHING

this is for non AWD models which counts me out.
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Old 02-05-2020, 10:56 AM #13
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Quote:
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Not the tires. This was happening on my old Toyo AT's. These Firestone's are brand new.
Have you ever tried different rims? Like a whole different set of tires and rims? Just to see if there is any difference?
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Old 02-05-2020, 12:26 PM #14
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subd. I think I have the same issue happening
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Old 02-05-2020, 07:42 PM #15
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It's probably a wheel bearing. They can look perfectly fine on the outside but still be slowly self destructing on the inside. For what it's worth, same exact symptoms that I had a few years ago. Replaced both bearings and everything went back to normal.
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