Jump to content

8spd issues

David DeSouza
 Share

Recommended Posts

TeamSaris Enthusiast

TeamSaris

Posted
Posted

Trading my 8spd for a 10spd this week.

But, since the transmission fluid was changed and some kind of TSB done for the cold hesitation, I have to say its been a lot better. 

  • 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

Jac365 Enthusiast

Jac365

Posted
Posted
24 minutes ago, TeamSaris said:

Trading my 8spd for a 10spd this week.

But, since the transmission fluid was changed and some kind of TSB done for the cold hesitation, I have to say its been a lot better. 

What is "the cold hesitation"?

RWTJR Enthusiast

RWTJR

Posted
Posted
5 hours ago, UGADawgs said:

My 2019 5.3/8-speed has been acting up lately. It seems like it is hunting gears when it shouldn't be shifting. Going to take it in this week and see if they'll change the ATF under the TSB.

 

https://static.nhtsa.gov/odi/tsbs/2020/MC-10174268-9999.pdf

Don't be surprised if they refuse to perform a TSB for transmission shudder on a vehicle that is not experiencing shudder. You may have an issue that is repairable under warranty but if it's not shudder this TSB doesn't apply.

 

My previous truck was a 2018 Colorado with the 8 speed and some Colorado owners tried getting non-shudder issues addressed by the 18-NA-355 TSB, https://static.nhtsa.gov/odi/tsbs/2019/MC-10163890-9999.pdf , (same issue, earlier TSB) and almost always were denied. Some would complain of harsh shifting and the dealer would say No to the TSB. Many who had shudder reported shift improvement in addition to shudder elimination after the TSB. The July 08, 2019 update of the TSB removed the requirement for PicoScope testing or other diagnosis beyond owner complaint of Shudder BUT it had to be a complaint of shudder (not gear hunting).

 

Good luck. Let us know what they say.

 

JMHO

No expertise implied or expressed

 

 

UGADawgs Enthusiast

UGADawgs

Posted
Posted
9 hours ago, RWTJR said:

Don't be surprised if they refuse to perform a TSB for transmission shudder on a vehicle that is not experiencing shudder. You may have an issue that is repairable under warranty but if it's not shudder this TSB doesn't apply.

 

My previous truck was a 2018 Colorado with the 8 speed and some Colorado owners tried getting non-shudder issues addressed by the 18-NA-355 TSB, https://static.nhtsa.gov/odi/tsbs/2019/MC-10163890-9999.pdf , (same issue, earlier TSB) and almost always were denied. Some would complain of harsh shifting and the dealer would say No to the TSB. Many who had shudder reported shift improvement in addition to shudder elimination after the TSB. The July 08, 2019 update of the TSB removed the requirement for PicoScope testing or other diagnosis beyond owner complaint of Shudder BUT it had to be a complaint of shudder (not gear hunting).

 

Good luck. Let us know what they say.

 

JMHO

No expertise implied or expressed

 

 


I mentioned the gear hunting because the truck was shaking and the RPMs were fluttering slightly at constant speed. I will describe it as shudder per the TSB when dropping it off and have it printed to hand to the service writer. I'll let you guys know either way.

 

TeamSaris Enthusiast

TeamSaris

Posted
Posted
11 hours ago, Jac365 said:

What is "the cold hesitation"?

When the truck is cold it feels like the trans finds neutral between first and second. The whole truck "lurches". Sometimes bad, sometimes not bad. It has gotten a lot better since the last update and transmission fluid change, the truck runs great too. I just didnt want any issues down the road. I was adamant my new truck had the 5.3 10spd. 

UGADawgs Enthusiast

UGADawgs

Posted
Posted

Dropped it off today and told them about the hard shift between 1 & 2 when cold and the random shutter during acceleration and they changed the fluid per the TSB without asking questions.

 

image.png.2bdd6fc802348d628a53d53982a3104f.png

SilveradoRST Enthusiast

SilveradoRST

Posted
Posted
40 minutes ago, UGADawgs said:

Dropped it off today and told them about the hard shift between 1 & 2 when cold and the random shutter during acceleration and they changed the fluid per the TSB without asking questions.

 

image.png.2bdd6fc802348d628a53d53982a3104f.png

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

  • Like 1
David DeSouza New Member

David DeSouza

Posted
  • Author
Posted

My new company truck is a 8spd 5.3 4x4, my previous company truck was a 2013 f150 5.0 4x4! Last week I was towing a trailer about 6k lbs, I've towed the same load many times with the ford, 65-70mph country roads with smalls hills! Going down a grade or coming to a stop the ford had aggressive engine breaking and the Silverado doesn't seem to want to downshift to allow engine breaking! Both in tow haul mode, I would set cruise on the Silverado and it would exceed the cruise set point by 10mph going down hill and the f150 would not go any higher then 3mph over the set point! 

 

Besides that I have really enjoyed driving the Silverado, I'm ready to upgrade my personal vehicle! I have always had Toyota's but thinking about jumping ship this time around! 

David DeSouza New Member

David DeSouza

Posted
  • Author
Posted
On 12/28/2020 at 3:33 PM, BlancoSilverado said:

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. 

Thanks didn't know that, and theirs a few for 41k locally, sounds like a better option over getting the Texas edition. 

UGADawgs Enthusiast

UGADawgs

Posted
Posted
On 12/30/2020 at 5:59 PM, SilveradoRST said:

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

Negative, no affect, still have it.

TNTSierra Senior Enthusiast

TNTSierra

Posted
Posted
2 hours ago, UGADawgs said:

Negative, no affect, still have it.

I have a buddy that has a 2017 5.3L with 8 spd and he says he has cold hard shifts but if he remote starts it and let’s it sit for 5 mins to warm up the truck doesn’t hesitate or have the hard shifts.   Anyone else verify this??  
 

UGADawgs Enthusiast

UGADawgs

Posted
Posted
22 minutes ago, TNTSilverado said:

I have a buddy that has a 2017 5.3L with 8 spd and he says he has cold hard shifts but if he remote starts it and let’s it sit for 5 mins to warm up the truck doesn’t hesitate or have the hard shifts.   Anyone else verify this??  
 

yeah, if I wait for it to warm up, it won't do the cold 1-2 shift lunge. 

UGADawgs Enthusiast

UGADawgs

Posted
Posted
12 minutes ago, UGADawgs said:

yeah, if I wait for it to warm up, it won't do the cold 1-2 shift lunge. 

To describe it, it is like the truck goes to speed up and is then slightly being pulled back by tug rope and then it releases and it lunges and drives normally. 

TNTSierra Senior Enthusiast

TNTSierra

Posted
Posted

Owe I know. I had a 2018 8 spd with 6.2L. Absolutely loved the truck but couldn’t stand the clunking. My truck did this all the time. If I had known I could have let it warm up a bit and it wouldn’t happen. Might have kept me from trading it in, but then again, after driving the 10 spd it was a done deal. 
Seems to me like a simple fix??  Start it and let it run a few minutes. 

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

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,896
    Total Members
    8,960
    Most Online
    morrislh
    Newest Member
    morrislh
    Joined

  • Who's Online   4 Members, 0 Anonymous, 948 Guests (See full list)

  • Latest Articles

  • Posts

    • JimCost2014
      Towing In Loose Gravel

      By JimCost2014 · Posted

      If what you are doing works, keep doing it:   4LO (Four-Wheel Drive Low) should only be used in extreme low-speed, high-torque situations such as deep mud, heavy snow, steep rock crawling, or extreme inclines/declines, and you must follow the correct engagement procedure to avoid drivetrain damage. Intended Use Cases Deep mud or snow where traction is extremely poor and you need maximum torque to get unstuck Trucks Only+1. Rock crawling on steep, uneven terrain forum.fullsizechevy.com+1. Extreme inclines or declines where you need to control speed and maintain traction solutionsphere.blog. Heavy towing in low-traction conditions (e.g., deep sand, ice) carclubsusa.com.
    • rdonarski
      Towing In Loose Gravel

      By rdonarski · Posted

      Hi,   I work a steep boat landing that has patchy blacktop going down the hill and soft sand/gravel at the bottom. Due to low water levels, it's not always possible reach the blacktop. I've had to help several people get out this year already and with fall coming, I'm anticipating more. I always use 4L. There was a gentleman there today with a 2500 HD (actually 2 - him and his son both have them) and they were trying to get his son's wake boat out. This gentleman swears that you should use 4H in the soft gravel. Says he was a farmer and you always use higher gear when stuck. I was wonder what your thoughts on this are? If I'm wrong, it would be good to find out before things get busy.
    • Bill Lemmond
      Roll up bed cover experiences

      By Bill Lemmond · Posted

      Looking for feedback from users of roll up aluminum slat bed covers who have had it for more than 3 years. I prefer the aluminum slat style over supported vinyl covers due to security and the capacity to support a light load. The slight loss of bed opening when rolled up is not an issue. Presently have BAK Revolver the "industrial grade vinyl overlay" on mine is shrinking & coming loose at the rear and on both sides in addition to cracking at some of the folding joints. Truck lives outdoors in NC latitude. Can't justify the steep price to replace it with another one if that's the expected lifespan. Do you have a better alternative?
    • Bill Lemmond
      BAK Revolver bed cover

      By Bill Lemmond · Posted

      Thanks, your last sentence is the root of my problem, outdoors truck and southern latitude = UV overload. Looking at replacing with Rough Country powder coated aluminum slat roll up model. 
    • JakeD
      Tire fitment

      By JakeD · Posted

      I’m looking at putting a lift in my 2024 gmc sierra 1500 elevation trim, has anyone had any luck with fitting a bigger tire under the rear for a spare?? Was gonna go with a 4 inch zone lift Also what wheel and tire size setup are you all running? Wondering if I can get away with keeping around the stock size a 33 inch, and just get some new wheels to have enough back spacing then I can just keep my original spare tire I have under the truck now.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...