Jump to content

8spd issues

David DeSouza
 Share

Recommended Posts

David DeSouza New Member

David DeSouza

Posted
Posted

Thinking about buying a 2021 Texas edition with a 5.3 and the z71 package, I would like to get a 10spd but trying to keep the purchase price below 40k! Has all the issues been resolved with the 8spd or is better to get a higher trim that has the 5.3/10spd combo? 

  • Replies 50
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

BigMick2023
BigMick2023

2020 RST with 5.3 8-speed.... Zero issues with the transmission or otherwise......this truck has been flawless so far and never been back to the dealer.  Owned it for just shy of 1-year now.

SilveradoRST
SilveradoRST

Let us know if it improves the cold 1-2 hard shift.  

SilveradoRST
SilveradoRST

I know it’s an easy fix of a 5 minute warmup to avoid clunks.  But I would get the 10 speed just to avoid having to do that.  Would be nice to just get it and go in the mornings.     Wish they

Posted Images

SilveradoRST Enthusiast

SilveradoRST

Posted
Posted

Had my 8 speed for 15 months now.  No issue other than a hard 1-2 on cold mornings.  But once it gets up to operating temp it is smooth as can be.  

Silverado4x4 Senior Enthusiast

Silverado4x4

Posted
Posted

My 19 Z71 8 speed had the stutter while giving it a light throttle in-between shifts but once they flushed the tranny and put the new updated trans fluid in it has been smooth as butter.

 

My 19 was a November of 2018 build which had the fluid from the factory that was absorbing moisture causing the stutter in-between shift under light throttle then they issued a TSB for the issue to put a new type of fluid in and its been great but since you are getting a 21 the issue wont be there as it will have the new fluid in it. 

SilveradoRST Enthusiast

SilveradoRST

Posted
Posted
20 minutes ago, Silverado4x4 said:

My 19 Z71 8 speed had the stutter while giving it a light throttle in-between shifts but once they flushed the tranny and put the new updated trans fluid in it has been smooth as butter.

 

My 19 was a November of 2018 build which had the fluid from the factory that was absorbing moisture causing the stutter in-between shift under light throttle then they issued a TSB for the issue to put a new type of fluid in and its been great but since you are getting a 21 the issue wont be there as it will have the new fluid in it. 

When did you buy the truck?  I read elsewhere that the dealer is suppose to change to the new ATF for all the trucks on their lot after March 2019 before sale?

2024Denali Enthusiast

2024Denali

Posted
Posted
31 minutes ago, Silverado4x4 said:

My 19 Z71 8 speed had the stutter while giving it a light throttle in-between shifts but once they flushed the tranny and put the new updated trans fluid in it has been smooth as butter.

 

My 19 was a November of 2018 build which had the fluid from the factory that was absorbing moisture causing the stutter in-between shift under light throttle then they issued a TSB for the issue to put a new type of fluid in and its been great but since you are getting a 21 the issue wont be there as it will have the new fluid in it. 

Same! Harsh shift every once in a while first thing in the morning. Other than that, works great! Barely notice it shifts.

Silverado4x4 Senior Enthusiast

Silverado4x4

Posted
Posted (edited)
25 minutes ago, SilveradoRST said:

When did you buy the truck?  I read elsewhere that the dealer is suppose to change to the new ATF for all the trucks on their lot after March 2019 before sale?

Mine was bought 1st week of March of 2019 but didn't have the issue until I put about 7000 miles on it. 

Edited by Silverado4x4
Moend Enthusiast

Moend

Posted
Posted
3 hours ago, SilveradoRST said:

Had my 8 speed for 15 months now.  No issue other than a hard 1-2 on cold mornings.  But once it gets up to operating temp it is smooth as can be.  

+1

asalinasz39 Enthusiast

asalinasz39

Posted
Posted

My 19 8spd/5.3 has been overall very smooth. It has done the hard shift coming out of my driveway very rarely in the 18 months I have owned it. I have 19k miles on it and It sure has been much smoother than my 17 8spd/5.3

Although I do wish I could have the 10speed because if you plan to upgrade tires the 3.23 gears will go better with those extra speeds.

 

 

Sent from my iPhone using Tapatalk

BigMick2023 Enthusiast

BigMick2023

Posted
Posted

2020 RST with 5.3 8-speed....

Zero issues with the transmission or otherwise......this truck has been flawless so far and never been back to the dealer. 

Owned it for just shy of 1-year now. 

  • Like 1
lebag335 Enthusiast

lebag335

Posted
Posted

My ‘19 TB LT 8 speed bucked pretty good. My ‘20 AT4 8 speed is smooth as butter! Huge difference. 

dgstarr63 Enthusiast

dgstarr63

Posted
Posted

My 2021 Silverado Crew cab, 4wd, 5.3, 8 speed, 3.23 axle has been flawless in every way, including the transmission. Gas mileage has increased 1.5 to 2 mpg better than my 2015, 5.3, 6 speed, 3.42 axle.

UGADawgs Enthusiast

UGADawgs

Posted
Posted (edited)
44 minutes ago, SilveradoRST said:

If you don't mind, what's the build date and when did you buy it off the lot?

Build: Nov 2018
Purchase: Mar 2019

 

Current Mileage: 16k

Edited by UGADawgs
BlancoSilverado Enthusiast

BlancoSilverado

Posted
Posted

Check out the Sierra, you can get the 10 speed in the SLE (1 up from base, assuming crew cab, 4wd, short bed). 50k msrp, probably 42k out the door. 

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

    • iso221
      Injector update

      By iso221 · Posted

      Because single shot injectors are ancient and multi hole injectors provide smoother running engines and sharper throttle response due to the fuel being atomized better..the best lead I have is a 24lb blue top injector almost everything matches up but the injector will put out about 26lb/hr which is just outside the gm threshold.figured id ask here to see if there was an absolute answer
    • CamGTP
      Injector update

      By CamGTP · Posted

      Why is my question?   Any change in injectors requires a tune. Unless you are going back with the OEM part number or a newer part number of that same injector.   Any size difference or type difference like the EV6 style injectors all have different injector data for them. And there is no EV6 injector that matches the factory 25 lb/hr size that your truck comes with. I've been messing with these trucks and tuning them for a long time and what you trying to do doesn't exactly make sense to me.
    • James McArthur
      2023 2500hd 6.6 l8t gas lifter ticking with misfire

      By James McArthur · Posted

      My 6.6 gas lt8 had lifter noise with 28000 miles bought new 2026 and while driven to dealer it threw #1 rod bearing “HD my ass” good luck with yours i hope it don’t turn a rod bearing!
    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      When a condition becomes a business model.    https://www.gm-trucks.com/gm-truck-suv-incentives-pricing-2026/   Zane posted this in "Latest Articles".    The honest bottom line   Truck buyers have spent three years assuming this is a temporary condition that will break once inventories normalize. GM just presented it to investors as a durable strategy, on a chart, as evidence of good management.   Inventory did normalize. GM is at 511,000 units and squarely inside its own 50 to 60 day target. The discounts still did not come back, because the low incentive number is the goal rather than a symptom of shortage.   Plan your purchase around that reality instead of waiting for it to change. Follow our ongoing GM News coverage for pricing and incentive changes as the next-generation trucks land.
    • Grumpy Bear
      Winter Returned

      By Grumpy Bear · Posted

      Thought it was raining this morning when we woke. Nope. Dew point was over 80 F and humidity 98%. Zero visibility distance. Everything was 'sweating'. I've seen rain come out of clouds but never out of Pepper or the tree trunks.    Wicked storms just missed us sliding off to the east but by blocks. Heat index about 110 F with air temp in the 90's.    This is  our third wave this month of multiple days of this type of weather. And yet the grass is going dormant and the ground is cracking this side of the street and water up the the hood opposite. Just weird stuff going on. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...