2020 Telluride AWD rear end jerking thumping and vibrating

[JerseySXP]

This is what he wrote:
The Kia Telluride and the Hyundai Palisade are the same vehicles. their engine design is a little too high for the driveshaft to work properly.
The rear end angle is at 0 degrees and so is the transaxle. The rear half of the driveshaft is also at 0 degrees, however, the front section is at 5 degrees. With the difference in angle, there should be cv heads at the middle as well as the transaxle attachment. There is a cv head in the middle at the center support bearing. there is a single u-joint not a cv head at the trans. A single u-joint connection at the trans with a difference of 5 degrees will certainly cause a noticeable shudder at speed.

Alright so I'm no mechanic but this sounds highly technical.

It begs the question @mgoblue - did they just keep replacing the driveshaft or did they "rebuild" it by adding CV joints where needed as mentioned by @Bev ?

 

[2020Telly]

Alright so I'm no mechanic but this sounds highly technical.

It begs the question @mgoblue - did they just keep replacing the driveshaft or did they "rebuild" it by adding CV joints where needed as mentioned by @Bev ?

I think a U joint driveshaft vs one with CV joints is a different design.

https://www.cjponyparts.com/resources/u-vs-cv-joints

The main visible difference may be that the CV style had a rubber boot.

 

[JerseySXP]

I think a U joint driveshaft vs one with CV joints is a different design.

https://www.cjponyparts.com/resources/u-vs-cv-joints

The main visible difference may be that the CV style had a rubber boot.

the mystery deepens because @mgoblue had to get a second round of Driveshafts/AWD couplers installed to fix his issue...

I'm really curious if they kept replacing it with the same OEM driveshaft or if they learned their lesson and they installed one with CV joints...

He also didn't take a payment/sign something like an NDA and can freely talk to us..

FYI - went to my sisters place really quick and the vibration is worse at 68mph - I mean noticeably worse. I'm thinking them balancing my tires helped isolate my driveshaft issue...

Calling the SM back tomorrow morning. Not even bringing up these findings yet.

 

[Bev]

I think a U joint driveshaft vs one with CV joints is a different design.

https://www.cjponyparts.com/resources/u-vs-cv-joints

The main visible difference may be that the CV style had a rubber boot.

See attachment

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[JerseySXP]

See attachment

Thank you for sharing this.

When he quoted you for the repair work - do you recall what exactly they would look to fix/replace?

 

[Bev]

Thank you for sharing this.

When he quoted you for the repair work - do you recall what exactly they would look to fix/replace?

On his description, he says it should have cv heads in the middle and front transaxle. He quoted me about $1k. However, if you pay to have it done without Kia's blessing, it voids your warranty.
Is there any way you can share that attachment with everyone because I tried to piggyback on one of your posts and it said I had too many characters?
I tried to start a new threat about vibration diagnosis.

 

[JerseySXP]

On his description, he says it should have cv heads in the middle and front transaxle. He quoted me about $1k. However, if you pay to have it done without Kia's blessing, it voids your warranty.
Is there any way you can share that attachment with everyone because I tried to piggyback on one of your posts and it said I had too many characters?
I tried to start a new threat about vibration diagnosis.

 

[Jpzy17]

If the driveshaft is off 5°, I’m wondering why everyone isn’t having this issue. I haven’t read this entire thread but have been following it for a couple of weeks.

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[JerseySXP]

If the driveshaft is off 5°, I’m wondering why everyone isn’t having this issue. I haven’t read this entire thread but have been following it for a couple of weeks.

That is a great question.

I recommend everyone to seriously check their rides out in the 60-74mph range and honestly just look for something off/vibrating...No we didn't buy a rolls royce or Bentley but the more people that check their tellies the better.

If it truly comes down to only a handful of us having this issue then I have no idea how it can be an across the board design issue.

 

[Bev]

If the driveshaft is off 5°, I’m wondering why everyone isn’t having this issue. I haven’t read this entire thread but have been following it for a couple of weeks.

Either they have a front-wheel-drive or they aren't on the highway at those speeds much and are on bumpy roads to where they can't tell.
It has to be on all the AWS because the engine sits higher. The FWD doesn't have a drive shaft.

 

[smokey_mountain]

Well first of all @Bev thank you for your dedication, I wish there were more people that keep fighting these "giants". While I understand that modern cars are disposable, it is wrong to produce cars that have such severe manufacturing or design defects. With that said, it will be very hard to prove that this is a design issue, apparently only select few users are complaining about it out of 30K AWD Telluride sold. AWD Palisade had a TSB that supposedly fixed vibration, did it or did it not? Anybody has any insights? It is clear it is not possible to fix a design issue that easily by just replacing the a driveshaft.

 

[mgoblue]

I'm really curious if they kept replacing it with the same OEM driveshaft or if they learned their lesson and they installed one with CV joints...

They did not do anything new/custom in the design of the system. Per my paperwork, they just replaced with OEM parts, in this order:

1. OEM Driveshaft: 49300-s8050
2. OEM Coupling: 47800-4g500
3. OEM Coupling (same as above, but from a new "batch")
4. OEM Driveshaft (same as above)

(Note the prices on those parts btw!)

The vehicle was returned to me in between after #3 as fixed. But it was not... so it went back in and Techline tried again with a new driveshaft, which finally worked.

I didn't get a lot of info about what was wrong with the driveshafts. The guy doing pickup/dropoff suggested that if they are out of balance they can cause vibration and it took two tries to get one that was balanced.

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[Bev]

Well first of all @Bev thank you for your dedication, I wish there were more people that keep fighting these "giants". While I understand that modern cars are disposable, it is wrong to produce cars that have such severe manufacturing or design defects. With that said, it will be very hard to prove that this is a design issue, apparently only select few users are complaining about it out of 30K AWD Telluride sold. AWD Palisade had a TSB that supposedly fixed vibration, did it or did it not? Anybody has any insights? It is clear it is not possible to fix a design issue that easily by just replacing the a driveshaft.

Replacing the driveshaft won't fix it. Because of the design and the 5 degrees off, the front transaxle has to be elevated to elevate the driveshaft and a u-joint isn't sufficient. It also needs cv (whatever a cv is).

 

[Bev]

They did not do anything new/custom in the design of the system. Per my paperwork, they just replaced with OEM parts, in this order:

1. OEM Driveshaft: 49300-s8050
2. OEM Coupling: 47800-4g500
3. OEM Coupling (same as above, but from a new "batch")
4. OEM Driveshaft (same as above)

(Note the prices on those parts btw!)

The vehicle was returned to me in between after #3 as fixed. But it was not... so it went back in and Techline tried again with a new driveshaft, which finally worked.

I didn't get a lot of info about what was wrong with the driveshafts. The guy doing pickup/dropoff suggested that if they are out of balance they can cause vibration and it took two tries to get one that was balanced.

Did they put cv heads in the middle as well as the transaxle?

 

[mgoblue]

Did they put cv heads in the middle as well as the transaxle?

No, the only parts listed on my service orders were the ones mentioned above and some new bolts

 

[JerseySXP]

This is absolutely stunning.

@mgoblue - Kia could actually high speed balance the driveshafts instead of replacing them. I believe someone had success with that on an earlier page. Blows my mind they paid that much without finding a shop to high speed balance it instead!

@Bev maybe ask your place could it be that the driveshaft is just out of balance possibly and the 5 degrees is within a normal "tolerance"?

@smokey_mountain - yes the Palisade TSB was out on this but that was with very specific manufactured dates. The issue with the Telluride is all over the place.

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[mgoblue]

@mgoblue - Kia could actually high speed balance the driveshafts instead of replacing them. I believe someone had success with that on an earlier page. Blows my mind they paid that much without finding a shop to high speed balance it instead!

They just do what techline tells them to do

 

[smokey_mountain]

Well very cursory search from Palisade forum 2021 Palisade AWD Limited vibration issue

 

[JerseySXP]

Well very cursory search from Palisade forum 2021 Palisade AWD Limited vibration issue

Well there you have it.

Known issue across both brands. The fact you found stuff on 2021 says a lot. Their TSB was only on 2020s.

 

[JerseySXP]

Just spent some time on the Palisade forums and a good amount of folks talking about the same scenario...sadly many of them had to get Hyundai Customer service involved as well...

The SM tomorrow is going to tell me the vibration is gone - I absolutely know it..then the fight begins.