GM Waiting to Fix Transmission on my 1 Day old AT4

[HondaHawkGT]

On 2/10/2019 at 3:44 PM, SILVER SLED said:

Apparently the old fluid held too much moisture for these trans’s to work as designed.  Basically the new fluid doesn’t hold any/as much water.  How?  I have no idea. 

 

Knock on wood, 19,000 miles and my 8 speed is still an awesome driving shifting transmission 

 

Once you read just what exactly was going on, it makes total sense. There's a good description here:

https://gm-techlink.com/?p=11127

 

It's a clarification in the comment section from "Ed.":

 

"The base stock of old fluid (19355656) has the ability to attract low levels of moisture, which can cause degradation of the coefficient of friction of the fluid. The new fluid (19417577) has a new GTL (Gas to Liquid) base stock that is able to tolerate more moisture. Shuddering transmissions and torque converters have been recovered with the new fluid. New transmission fluid tests have been developed due this issue to prevent it from occurring with new transmission fluids."

 

Edited May 21, 2019 by HondaHawkGT

[benelli]

On 11/30/2018 at 10:53 AM, selmahotrod said:

GM cannot fix my 2017 8 speed

 

LOL i hear you brother. they just blow off customers as this is normal operation. Has anyone hear been contacted by a member here claiming to be a law firm in London Ontario. wanting to talk to people that have had issues with these transmissions? They contacted me wanting to know more about these issues i was having. they said theres a class action law suit in the USA. Thinking there trieng to set one up here maybe thats why they want to speak to customers of thes vehicles.

[TX Goodfella]

On 10/28/2018 at 8:44 PM, Jimbo20 said:

10 speed, 6.2l.   It was towed in on Wednesday.

 

My 2019 AT4 towed this morning, drove home yesterday in 4lo as that’s the only way it would move. 7k miles 4 months. Had appointment with dealer for tranny whining/hard shifting, made two weeks ago cause they so busy/no loaners. Now I’m seeing all this shit! Loyal gm guy for 30 yrs, 3rd Sierra and several Tahoes for wife. 10speed 6.2l. How long is it gonna take to get tranny swapped? THIS SUX!

[aha1987]

19 minutes ago, TX Goodfella said:

My 2019 AT4 towed this morning, drove home yesterday in 4lo as that’s the only way it would move. 7k miles 4 months. Had appointment with dealer for tranny whining/hard shifting, made two weeks ago cause they so busy/no loaners. Now I’m seeing all this shit! Loyal gm guy for 30 yrs, 3rd Sierra and several Tahoes for wife. 10speed 6.2l. How long is it gonna take to get tranny swapped? THIS SUX!

I am wondering if I am experiencing the same thing... I have a whine that gets louder as my RPM's increase... almost sounds like a turbo or supercharger. Does your whine progressively get louder as your RPM's go up? I took my truck into the dealership and they said that the noise was coming from a pump in the transmission... I am wondering if I need to take it back in for them to do something because I am worried it will cause a problem down the road... also it is very annoying.

[Pete 67]

I have a 2019 GMC AT4, 6.2L 10 Spd transmission, after a few thousand miles the transmission started making a clicking noise. Been waiting over a month for a new transmission. Dealer said parts are not available and there is no ETA on transmission. Ford at least offers parts on their joint 10 speed transmissions {many of the internal parts may be interchangeable if the part numbers can be crossed}. Ford does have different gears and sensors.

[anthony2558]

Could we assume that the NEW fluid (19417577) is already being used in the 2019 transmissions? Can anyone verify this? 

[Black02Silverado]

5 hours ago, anthony2558 said:

Could we assume that the NEW fluid (19417577) is already being used in the 2019 transmissions? Can anyone verify this? 

I would say yes to any 2019 that was produced after January 2019.  That is when the fluid was released for use.  Any vehicle before that time it more than likely isn't.  Only thing is the 10sp takes a different fluid than the 8sp. 

[anthony2558]

19 minutes ago, Black02Silverado said:

I would say yes to any 2019 that was produced after January 2019.  That is when the fluid was released for use.  Any vehicle before that time it more than likely isn't.  Only thing is the 10sp takes a different fluid than the 8sp. 

Dont they mass produce transmissions and stack them on a rack for use later. Its technical the same trans as a 2015-2018, right? I'll be at the dealer today for service, will report back.

[Black02Silverado]

41 minutes ago, anthony2558 said:

Dont they mass produce transmissions and stack them on a rack for use later. Its technical the same trans as a 2015-2018, right? I'll be at the dealer today for service, will report back.

If so they are not going to be stored full of fluid.  They would get serviced once installed and operationally checked.  So if anything they could have a mix of old and new.

[gpraceworks]

So I have a 2020 AT4 2500HD with the 10 speed. With 399 miles the transmission did a hard sputter and then i couldn't go over 40 mph. Had it towed and they said the trans fluid was low from the factory. i got it back and it was fine for 2 weeks, then the same thing happened again. First they said they need to replace the transmission, but I got a call today saying after doing some more back and forth with GM they need to replace the "Valve Body". I will try to get the part number from them. 

 

Interestingly both times this has happened was after i had driven the truck, parked it for a few hours then drove it again. In both cases the temperature dropped 10-20 degrees.  I wounder if it is moisture/condensation from the warm case and cool outside temp? Need to check the fluid.

[RaisedByWolves]

On 10/16/2019 at 1:51 PM, anthony2558 said:

Dont they mass produce transmissions and stack them on a rack for use later. Its technical the same trans as a 2015-2018, right? I'll be at the dealer today for service, will report back.

Absolutely not, look up lean manufacturing.

 

 

I have been in manufacturing for 37yrs and have been dealing with JIT/Lean and other manufacturing programs and you basically receive the item right before you use/install it.

 

Beancounters again. Every component has a dollar value assessed to it the minute you take control of it (Receiving) and the loan amount of that party starts adding up interest until the buyer receives it.

 

Sitting in the warehouse waiting to be installed, going down the assembly line, sitting on the dealers lot, That money is tied up and generating negative interest on its value that costs the MFG money.

[Pete 67]

2019 GMC Sierra: Factory "engineer" was full of SHIT! 

Transfer case had metal to metal sound, replaced under warranty.

The very day i picked it up the transmission started making noise and speedometer fluctuated, brought back to dealer, a few weeks later the gmc factory engineer dropped the pan and said it was the speed sensor hitting the relucter, can't buy parts so it needs a new $7,000.00 transmission {no eta-on strike} & no waranty because of mod.

Brought it to a transmission shop, the next day he was done, shifting fork spring wasn't aligned correctly either from the factory or when it was installed-that's it, nothing to do with transmission. The factory "engineer" was full of SHIT! 

[BlancoSilverado]

6 hours ago, Pete 67 said:

2019 GMC Sierra: Factory "engineer" was full of SHIT! 

Transfer case had metal to metal sound, replaced under warranty.

The very day i picked it up the transmission started making noise and speedometer fluctuated, brought back to dealer, a few weeks later the gmc factory engineer dropped the pan and said it was the speed sensor hitting the relucter, can't buy parts so it needs a new $7,000.00 transmission {no eta-on strike} & no waranty because of mod.

Brought it to a transmission shop, the next day he was done, shifting fork spring wasn't aligned correctly either from the factory or when it was installed-that's it, nothing to do with transmission. The factory "engineer" was full of SHIT! 

What mod did you do to void the warranty?

[mistaare]

Curious about the mod as well?

[benelli]

On 5/20/2019 at 10:09 PM, HondaHawkGT said:

 

Once you read just what exactly was going on, it makes total sense. There's a good description here:

https://gm-techlink.com/?p=11127

 

It's a clarification in the comment section from "Ed.":

 

"The base stock of old fluid (19355656) has the ability to attract low levels of moisture, which can cause degradation of the coefficient of friction of the fluid. The new fluid (19417577) has a new GTL (Gas to Liquid) base stock that is able to tolerate more moisture. Shuddering transmissions and torque converters have been recovered with the new fluid. New transmission fluid tests have been developed due this issue to prevent it from occurring with new transmission fluids."

 

Its All bull Crap There isn`t any transmission fluid going to fix a failed designed Transmission. I had the flush done twice with the Mobile 1 Hp Stuff if anything its worse. just another string a log move by GM. then they tell you to drive it for another 200 mile so it relearns. LOL LOL seems like all gm products have learning disabilities. The service advisors get trained on that phase when they cant fix shit. LOL . i the men time you drive it for another few hundred k`s and thats how they get rid of you for awhile

Edited December 5, 2019 by benelli