Jump to content

transmission issue

mfbearded
 Share

Recommended Posts

econometrics Senior Enthusiast

econometrics

Posted
Posted
1 minute ago, Silverado4x4 said:

Yep you have the trans shutter, mine didn't show up till around 12,000 miles so I took it in and had the trans flush with the new updated fluid and now its as smooth as butter.

 

Thanks, that's encouraging. 

  • Replies 50
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

Z45
Z45

Mass production and cost concerns lead to "good enough", but not necessarily the best available. Look at OEM lubes, for example, decent quality, "good enough" quality, but not necessarily the best ava

Swiftks
Swiftks

Enough of this... My 2019 TrailBoss w/ 8-speed goes in to local shop tomorrow and gets full flush and replacement with Amsoil Signature.  Also figured it would be a good time to swap the front and rea

Swiftks
Swiftks

Quick Update... After getting the transmission flushed and all fuilds switched over to Amsoil Signature, the truck does seem to shift and ride smoother.... Could be placebo, only time will tell.

Posted Images

BamX31 Enthusiast

BamX31

Posted
Posted

2019 Sierra 5.3 with the 8 speed trans. At approx 14,000 miles it started slamming into 2nd from 1st and upon stopping at a red ight it would lurch when going from 2nd to 1st. Took it to the dealer with concerns. Bad valve body was the culprit so they changed valve body along with the shift solenoid and transmission fluid and filter change. Only been two days since I got it back it it seams to be shifting the way that it should be.

milkmaster Enthusiast

milkmaster

Posted
Posted

Mine is a new Sierra 5.3 w/8speed tranny built in June 2021.  I should already have the newest fluid right?

SilveradoRST Enthusiast

SilveradoRST

Posted
Posted

Mine was built in Feb 2019.   Only have 10,000 miles, thanks COVID.  Just waiting for shutters and shakes to bring it in for the new ATF.   Drives smooth right now.  In the back of my mind I’m hoping I got lucky and received the new ATF from factory.   But I know March 2019 was when GM switched over.  

SilveradoRST Enthusiast

SilveradoRST

Posted
Posted (edited)
7 hours ago, dgstarr63 said:

The new fluid started being installed in the summer of 2019.


Hopes dashed.  Thanks for the info.   I guess I’ll have to wait for symptoms to appear.  
 

Edit:  The TSB says the cutoff/break point is March 1,  2019.   If they only started using the new ATF in the summer at the factory, are people with build dates between March 2, 2019 to June-ish screwed?

MC-10174268-9999.pdf

Edited by SilveradoRST
Spoogle Enthusiast

Spoogle

Posted
Posted

My transmission was perfectly fine right up until 2 weeks ago, then it ****** the bed completely with just under 20K miles. To make matters worse the dealership had to contact GM for the parts and so far haven't got a response so they can't give me any kind of estimate as to when I'll have a truck again.

Bigfoot98 Enthusiast

Bigfoot98

Posted
Posted
On 8/1/2021 at 11:49 AM, Wiggums said:

I have a 2019 with the 5.3 and 8-speed. I had that done too and it seems to have helped. I still have the morning clunks from cold starts, that part seems incurable.

Id still rather deal with the garage shift and minor harsh shift on a cold start over my f150 trying to activate the ejection seat while it was cold or when it felt like slipping.

  • Haha 1
mfbearded Enthusiast

mfbearded

Posted
  • Author
Posted

Tech at dealer took for it a drive. Immediately knew it needed a flush. Got it done while I waited. I noticed an improvement immediately. Thanks everyone for the input 

  • Like 1
SilveradoRST Enthusiast

SilveradoRST

Posted
Posted
1 hour ago, mfbearded said:

Tech at dealer took for it a drive. Immediately knew it needed a flush. Got it done while I waited. I noticed an improvement immediately. Thanks everyone for the input 

Did the symptoms (hesitation/shudder) show up one day and stay?   Or did it show up here and there and then eventually became consistent?   I had a few rumbles while cruising around 60km/h.  Happened only a couple of times.   3rd time it happened I slowed down and it went away.  But it doesn’t always happen…yet.   

SPASierra Enthusiast

SPASierra

Posted
Posted

Mine has had the harsh downshift in the past, but only first thing in the morning on cool days.  We were on vacation in Myrtle Beach last week and it started doing it consistently while we were in traffic.  Freaked my wife out that we would break down on the way home to PA.  I just passed 31K miles, so I guess it is time to take it to the dealer.  No idea when I will be able to get an appointment because the dealership was hit by a tornado a few weeks ago, which destroyed half of the service department building.  The other local dealer has been slammed ever since.

Swiftks Enthusiast

Swiftks

Posted
Posted

Enough of this... My 2019 TrailBoss w/ 8-speed goes in to local shop tomorrow and gets full flush and replacement with Amsoil Signature.  Also figured it would be a good time to swap the front and rear diff fuilds, as well as the transfer case fuild.  Will update will results after a few days of driving.

20210816_185414.jpg

  • Like 2
Black02Silverado Senior Enthusiast

Black02Silverado

Posted
Posted
1 hour ago, Swiftks said:

Enough of this... My 2019 TrailBoss w/ 8-speed goes in to local shop tomorrow and gets full flush and replacement with Amsoil Signature.  Also figured it would be a good time to swap the front and rear diff fuilds, as well as the transfer case fuild.  Will update will results after a few days of driving.

20210816_185414.jpg

Please keep us posted.  One customer I know of has had good results when he switched over to AMSOIL fluids in his 8sp.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • tararebecca
      2027 GMC Sierra: Official Discussion

      By tararebecca · Posted

      I agree, simplicity and reliability matter more as vehicles get more complicated. A V8 work truck option with fewer electronic features and a stronger warranty would definitely appeal to a lot of buyers who use their trucks for real work. Customizing it with trusted outfitters is often the best way to get exactly what you need.webcrimsNY
    • artistemorbidity
      2026 Sierra 1500 Denali - Sound upgrade?

      By artistemorbidity · Posted

      I’ve heard similar complaints from newer vehicles where the factory “premium” systems don’t always live up to expectations. A good installer should be able to improve the sound without turning it into a bass-heavy setup. I’d look into upgrading the front speakers, adding a quality DSP amplifier, and possibly improving sound deadening first—those changes usually make a much bigger difference than just adding a subwoofer. Hopefully someone local can recommend a reputable installer in the Las Vegas/St. George area.
    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      Do you remember that Harley Davidson was more successful (solvent) when it produced about 60% of the market demand (by design) and forced wait times of up to three years? Even when your turn came around it was, "Take what we are giving you or move to the back of the line and start over". HUGE markup's were 'normalized' and dealer killed. 40% markup and no floor plan? What's not to love? Greed will kill them yet. They have surplus production and customer base is tanking. And still they think nosebleed pricing will work.  
    • newdude
      Me too……..

      By newdude · Posted

      The engine was done as part of the 6.2 recall?   You'd have to see if your VIN also has the 6.2 engine special coverage on it.  Coverage number is N252494003.  If you have this, your engine is covered under this and NOT the GM replacement part engine warranty which is 3yr/100k from the date of install.  The 3yr/100k mi warranty is in effect for non warranty purchases.     This is not any different if it was replaced under warranty without a recall or special coverage.  So if you had a 5.3 and it popped at 3 years in at 50,000mi during the 5yr/60k powertrain, the replacement engine would not get the 3yr/100k, and instead gets the remainder of the 5yr/60k as coverage.     So N252494003 gives 10 years or 150,000mi of coverage, which ever comes first, starting at the vehicle in service date.  So if your in service date is 01/01/2022, N252494003 gives you special coverage of the engine until 01/01/2032 or 150,000mi, whichever comes first.  So if your start date was 01/01/2022, you'd have left 5 years and 4 months (lets round to august 1st), or 62,000mi left of coverage.   So you need to know your in service date to know how much coverage is left.  
    • CamGTP
      Injector update

      By CamGTP · Posted

      Okiee dokie there bud, way to take things to the extreme.   I guess you missed the whole point and take things way to serious. I installed different EV6 style injectors that just so happen to be larger in my car running the same LQ4 engine and with a better spray pattern than the stock style injectors and I noticed no difference in the idle quality. Kinda was my round about way of saying that even if you put the same size but better style injectors in your truck, you will likely see the same thing.    I'm sure you're great to have conversations with in person if that's how you act through a keyboard. One little things sets you off and now I guess my dick is all up in your face.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...