A huge post. Thank you.

 

Is this saying its no questions asked and you get a flush on the first visit?
Its clear that if you return with shudder, you get diagnostics.

 

That is what it should mean. I dropped mine off today so I will reports what 5hey do.

I gave them copies of the TSB and July Document number.

 

The way I read it is if the customer complains about shudder, they can now skip the diagnostics and go right to the flush. Then if the flush does not correct, then they must run the diagnostics.

 

Just curious - do we know if the published build dates have been changed? I would love to know if it is all of the 2019's or if they stopped at a specific month for the 2019 build date...

 

March 1 2019 they started the new fluid per the latest TSB.

 

Just got the truck back with the full flush to blue label done.

No hassle no issues and no questions.

I will see how it goes for the next week and see if I note any difference.

To be honest I really had little to no shudder but thought it wise to get with the new fluid since GM thinks enough of it to install it in the new trucks at this point.

No sense waiting till it starts and glazes the converter.

We all might want to remember this is on the drive line warranty so it is a 5 year 60k mile warranty so we should be safely covered for a good bit yet unless you really drive a lot.

 

Just got the truck back with the full flush to blue label done.

No hassle no issues and no questions.

I will see how it goes for the next week and see if I bore any difference.

To be honest I really had little to no shudder but thought it wise to get with the new fluid since GM thinks enough of it to install it in the new trucks at this point.

No sense waiting till it starts and glazes the converter.

We all might want to remember this is on the drive line warranty so it is a 5 year 60k mile warranty so we should be safely covered for a good bit yet unless you really drive a lot.

I'm right there with you on this. I haven't really experienced the shudder on my Canyon, just my Camaro, although it does do some weird shifting at low speeds. I just want this done for preventative maintenance and peace of mind

Bill

 

Can anyone provide a full length copy or a link to the 7/9/19 revised version of the TSB 18-NA-355?

I’ve now called two dealerships who claim they won’t perform the service without testing. Removal of testing was the primary reason for the revision to the TSB according to what I’ve read

 

I found this on the Camaro6 forum:

CAMARO6 - View Single Post - How is everyones new fluid flush for the shudder holding up?

Chevy Camaro Forum / Camaro ZL1, 1LE, SS and V6 Forums - Camaro5 & Camaro6.com

www.camaro6.com

I have two vehicles that I plan on getting the flush. My 2016 Camaro and my 2018 Canyon.

Bill

 

I don’t have the copy here but it is the TSB 18 NA 355

Refer them to the document 5181942 this is the update where I saw no diagnostic required.

It was on the GM system if they really want to look for it.

The date I had was July 8

 

I just talked with my service manager. On the books for the second 355 flush no questions. At least this time I’ll know the transfer tank won’t be frozen.

 

What model year/build date limitations are covered by this TSB?

 

On the Colorado and Canyon it is from SOP {Start Of Production} in 17 to March 1 2019.

Anything after March first is getting the new fluid now.

 

Wish this covered the 2016 Canyons too ?

 

Why? You should not have the problems that 17-up owners have. Yours is covered by a different TSB. TSB #18-NA-145.

 

Crazy to now see how many have been dealing with the shudder long term. Glad to see they are finally getting some relief.

its a real issue glad GM is addressing. Had mine flushed at 750 miles back in early May about 1400 now and working great.

 

I would like to get that flush line adapter. It appears to be return line/supply line diverter supplying new and draining old fluid.
Can anyone get a part number?

 

Mobil 1 Synthetic LV ATF HP (Case - 6 Quarts)

Mobil 1™ Synthetic LV ATF HP is an advanced full synthetic Automatic Transmission Fluid formulated from synthetic base oils and an advanced additive system. This high performance formulation protects your transmission in all operating conditions and a wide range of temperatures, which extends...

www.thelubricantstore.com

 

Is there a factory fluid aswell yet?

 

That is the factory fluid in the vette’s.

 

amazing gm can't get right year to year decade to decade

 

It is everyone anymore.

With cutting cost and more and more complex vehicles in a very competitive market they sometimes rush things through for better or worse.

Some MFGs have some less issue as they make such small changes that they perfect. The model but then you end up with a vehicle like a Taco that begins to fall behind.

Also today they can have supplier issues.

 

Took mine in for an oil change the other day and told them to check the tranny and they performed the TSB no other questions asked. This is at the same dealer I've had issues performing other warranty work before on my last truck.

 

Here is the TSB that was online

 

Without making me feel too stupid [emoji4], when it says "VIN S, T" by the Colorado listing what exactly are they talking about? I'm sure it's a digit in the VIN, but which one?

Sent from my HTC U11 using Tapatalk

 

I'm not a fan of quoting myself, but I'd really like to get this answered if anyone knows. Google didn't help me.

Sent from my HTC U11 using Tapatalk

 

Check it out:

"Dealers should discontinue the use of the black label Mobil 1 Synthetic LV ATF HP fluid. A communication from CCA will be released soon advising dealers of how to dispose of the old product.

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."

TCC Shudder and New Mobil 1 Fluid Exchange – TechLink

gm-techlink.com

 

Check it out:

"Dealers should discontinue the use of the black label Mobil 1 Synthetic LV ATF HP fluid. A communication from CCA will be released soon advising dealers of how to dispose of the old product.

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."

TCC Shudder and New Mobil 1 Fluid Exchange – TechLink

gm-techlink.com

Yes this was what GM started back in Dec.

It was the first admission to what was happening to cause this.

In what I have read on Shudder in the industry it has been moisture from various scourge that cause the issue. Some fluids and even in Audi it was from the transmission coolers in the Radiator.

It appeared logical but till some had it done with good results....

I even read on some gun web sites folks I pushed tranny fluid to prevent rust on guns. Some of the new formulas of other types are attracting moisture and has caused issues according to them.

It used to be simple we had just two main fluids and today look at how many we have.

 

I wonder if you could safely use the blue label new stuff in the 15-16s. I know we have different issues but, is the fluid better or, just better for the 8 speeds and their issues?

 

i find this post very interesting. the main reason i say that is i have a 2019 bison with a June production date. I am not sure if its a shudder so much as the truck under light acceleration feels like it cant figure out what gear to select and a mild "shake" happens. based off of the TSB mine shouldn't have that lol.

 

You have the new fluid.

As for what you have give it some miles. We all have found with more miles the transmission will fall in line more often. The adaptive programming works but it takes time and miles.

 

Sounds exactly like one of the symptoms.

 

Can anyone in Southern California recommend a GMC Dealership that has performed the latest TSB for the shudder? Can I take my GMC to Chevy? I have had 3 experiences now with two different GMC dealerships that have no idea what there doing. I went to my local dealer as per my appointment today. They gave me a brand new canyon for a loaner. This thing had no shudder or clunk in the trans drove so much nicer than my 18 Denali with ruffly the same mileage. Called 8 hrs later for an update for the advisor to tell me they haven't looked at the truck yet and to top it off he was going to be out tomorrow. In the heat of the moment decided to pick up my truck felt like they were wasting my time. Any advice? Thanks!

 

You may take any GM vehicle to any GM dealer for service work, warranty or not.

 

I want to give a BIG shout out to these forums, Just dropped my 2017 Coly off today after reading tthat everyone else here was having the same issues I was having,, I showed them the document ID and they changed out the fluids so we'll see how it goes. Thanks for all your input!