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8spd issues

David DeSouza
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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? 

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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

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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.

 

 

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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. 

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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. 

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