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#4635602 - 01/15/18 10:31 AM Trans problems
tig1 Offline


Registered: 01/03/09
Posts: 13660
Loc: Illinois
My son owns a 2017 GMC Yukon and the trans has had a clunk at low speeds(like in a parking lot) since it was nearly new. This time the dealer has pulled the trans and has it torn down and are replacing several parts. The transmission tech told my son this is the 31st one he has had to rebuild so apparently this is a ongoing problem in these type of vehicles.
Has anyone else had this issue?
_________________________
2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
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#4635604 - 01/15/18 10:34 AM Re: Trans problems [Re: tig1]
eljefino Offline


Registered: 06/15/03
Posts: 32635
Loc: ME
How do we know it's the trans and not a u-joint?

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#4635617 - 01/15/18 10:42 AM Re: Trans problems [Re: Wurlitzer]
Kira Offline


Registered: 08/19/10
Posts: 5230
Loc: Champlain/Hudson Valley
Did the trannie tech mention what specifically was wrong with the 30 bad ones before your son's?

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#4635623 - 01/15/18 10:48 AM Re: Trans problems [Re: tig1]
14Accent Offline


Registered: 08/03/17
Posts: 390
Loc: MN
Lots of issues with the 6L80. He's not alone.
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#4635624 - 01/15/18 10:51 AM Re: Trans problems [Re: 14Accent]
Lubener Offline


Registered: 01/22/11
Posts: 2576
Loc: N.Ohio
Originally Posted By: 14Accent
Lots of issues with the 6L80. He's not alone.

That model isn't the only GM gem with issues.
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#4635640 - 01/15/18 11:13 AM Re: Trans problems [Re: Lubener]
demarpaint Offline


Registered: 07/03/05
Posts: 29758
Loc: NY
Originally Posted By: Lubener
Originally Posted By: 14Accent
Lots of issues with the 6L80. He's not alone.

That model isn't the only GM gem with issues.


So I've heard.
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#4635685 - 01/15/18 12:03 PM Re: Trans problems [Re: tig1]
Donald Offline


Registered: 03/21/04
Posts: 20455
Loc: Upstate NY
Maybe buy an extended warranty.
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#4635838 - 01/15/18 02:30 PM Re: Trans problems [Re: Donald]
PimTac Offline


Registered: 03/04/17
Posts: 4285
Loc: Soviet State of Washington
Originally Posted By: Donald
Maybe buy an extended warranty.



I would push GovMo for an extended warranty. They must know there is an issue. Shouldn’t have to pay for one.
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#4635883 - 01/15/18 03:30 PM Re: Trans problems [Re: PimTac]
Kira Offline


Registered: 08/19/10
Posts: 5230
Loc: Champlain/Hudson Valley
How do you push?

"Gimme a double warranty or else I won't buy your vehicle"?

???

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#4635992 - 01/15/18 05:33 PM Re: Trans problems [Re: tig1]
Silverado12 Offline


Registered: 02/26/13
Posts: 3114
Loc: Central Virginia
Look at the domestic parts content on GM trucks; the quality and QC has gone down accordingly.
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#4635998 - 01/15/18 05:46 PM Re: Trans problems [Re: 14Accent]
clinebarger Online   content


Registered: 12/19/13
Posts: 1912
Loc: Fort Worth, Texas
Originally Posted By: 14Accent
Lots of issues with the 6L80. He's not alone.



GM has had 6L80E/6L90E issues ironed out since 2012. But.....Please elaborate.

Not that a 2017 Yukon even has a 6L80E, It has a 8L90E.....Different unit altogether!
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2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto

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#4636006 - 01/15/18 05:52 PM Re: Trans problems [Re: 14Accent]
tig1 Offline


Registered: 01/03/09
Posts: 13660
Loc: Illinois
Originally Posted By: 14Accent
Lots of issues with the 6L80. He's not alone.

Because he has had it in the shop three times and this apparently is a common problem.
_________________________
2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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#4636008 - 01/15/18 05:53 PM Re: Trans problems [Re: Kira]
tig1 Offline


Registered: 01/03/09
Posts: 13660
Loc: Illinois
Originally Posted By: Kira
Did the trannie tech mention what specifically was wrong with the 30 bad ones before your son's?


The power valve was mentioned.
_________________________
2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


Top
#4636023 - 01/15/18 06:11 PM Re: Trans problems [Re: tig1]
clinebarger Online   content


Registered: 12/19/13
Posts: 1912
Loc: Fort Worth, Texas
Originally Posted By: tig1
Originally Posted By: Kira
Did the trannie tech mention what specifically was wrong with the 30 bad ones before your son's?


The power valve was mentioned.


Must have a Holley Carburetor in that trans?? Or do you mean Boost Valve? Though that wouldn't cause a clunk.
_________________________
2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto

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#4636167 - 01/15/18 08:26 PM Re: Trans problems [Re: clinebarger]
tig1 Offline


Registered: 01/03/09
Posts: 13660
Loc: Illinois
Originally Posted By: clinebarger
Originally Posted By: tig1
Originally Posted By: Kira
Did the trannie tech mention what specifically was wrong with the 30 bad ones before your son's?


The power valve was mentioned.


Must have a Holley Carburetor in that trans?? Or do you mean Boost Valve? Though that wouldn't cause a clunk.


Thanks for the correction. I meant Valve body. Here is a link to a bad VB which can cause hard shifts.
https://cartreatments.com/valve-body-functions-and-symptoms/


Edited by tig1 (01/15/18 08:30 PM)
_________________________
2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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