Jump to content

1st to 2nd rough shift

BigredGMC
 Share

Recommended Posts

topgear1224 Enthusiast

topgear1224

Posted
Posted
Thanks for this explanation.  Good to understand it's a software thing.
Ya in theory there won't be any long term effects from the rough shifts. Time will tell.

Sent from my SM-N975U using Tapatalk

  • Like 1
  • Replies 55
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

jlong1984
jlong1984

Mine only has the harsh 1-2 shift when the transmission is cold and I go straight from reverse to drive. If I give it a few seconds before I shift from reverse to drive I don't get a harsh shift. 

vancealot29
vancealot29

I've tried that twice already with two different dealers, this is what I got back....   Hi, Vance. After speaking with your dealer, it has been found that the shift concern you are experienc

UGADawgs
UGADawgs

known issue for cold vehicles. let it warm up first or hold pedal down lightly until in 2nd after initial go.

Posted Images

BigredGMC Enthusiast

BigredGMC

Posted
  • Author
Posted
13 minutes ago, topgear1224 said:

Ya in theory there won't be any long term effects from the rough shifts. Time will tell.

Sent from my SM-N975U using Tapatalk
 

I bought a 7 year warranty, I guess if it breaks down I should be ok for at least that time.

  • Like 1
IceOnly Enthusiast

IceOnly

Posted
Posted

You would think after spending in excess of 50k on a new truck, you wouldn’t have tranny issues. My 15 Sierra shifted perfectly. No jerking or clunking. 

  • Like 2
BigredGMC Enthusiast

BigredGMC

Posted
  • Author
Posted
4 hours ago, IceOnly said:

You would think after spending in excess of 50k on a new truck, you wouldn’t have tranny issues. My 15 Sierra shifted perfectly. No jerking or clunking. 

Also making transmissions for over 100 years you would think they had it down pat. This is one of the issues when you sub it out to the lowest bidder. I just don't understand why ruin your reputation for a couple of bucks.  The paint chips so easily as well. I remember in the 90's GMC had a commercial having metal ball bearing dropped on the paint showing it's professional grade. Now I get chipped by a grain of sand. But this tranny in stop and go makes you nauseous. Slamming into 2nd every dam time.

  • Like 2
topgear1224 Enthusiast

topgear1224

Posted
Posted
You would think after spending in excess of 50k on a new truck, you wouldn’t have tranny issues. My 15 Sierra shifted perfectly. No jerking or clunking. 
Ironically their cheapest power plan is actually one of their very best performing.

The 4.3 has no torque limiting. It comes with 3.42 gears. When you move your foot the transmission downshift so there's no delay. It pops off manual downshifts better than the 8 speed or the 10 speed.

Sent from my SM-N975U using Tapatalk

  • Like 1
  • Thanks 1
  • 2 weeks later...
RubRsidedown New Member

RubRsidedown

Posted
Posted
On 7/3/2020 at 3:23 PM, topgear1224 said:

Ironically their cheapest power plan is actually one of their very best performing.

The 4.3 has no torque limiting. It comes with 3.42 gears. When you move your foot the transmission downshift so there's no delay. It pops off manual downshifts better than the 8 speed or the 10 speed.

Sent from my SM-N975U using Tapatalk
 

Sad thing is, I got this High Country powered with the 6.2l to better haul our boat to the lake. 

I don't believe the 4.3l would enjoy that haul. 

20200712_164918.jpg

  • Like 1
topgear1224 Enthusiast

topgear1224

Posted
Posted
Sad thing is, I got this High Country powered with the 6.2l to better haul our boat to the lake. 
I don't believe the 4.3l would enjoy that haul. 
20200712_164918.thumb.jpg.cba14557ee667641f2d53b25ed4829d0.jpg
Within its limits [emoji23].

Not even kidding I drove a custom 4.3 as a loaner and honestly thought it was a 5.3 with 3.42 (my truck had 5.3 and 3.23) until I checked the window sticker. It has a fat torque curve, and unlike the 5.3 doesn't get asthmatic as it approaches redline.

even out on the road I didn't really feel a difference until I pushed it over 70.

That stock 3.42 makes a huge difference. The G80 engages cleaner, just makes everything better.

The biggest thing for me though is instant response. A very predictable transmission. and I still love the fact that if I put it in an L and go all the way down to 1 as I slow down it will kick off perfectly matched downshifts with out me constantly slamming the - button. Wish the 8 speed and 10 speed would do that.

Sent from my SM-N975U using Tapatalk

  • Thanks 1
Wiggums Senior Enthusiast

Wiggums

Posted
Posted (edited)

My old man had the 460 V-8 in his F-250. I recall being so excited over the massive 245 hp and 380 lb-ft of torque. It was a majestic beast that could pull anything on God's green earth.

The current V-6 in Silverado produces 285 hp and slightly less torque at 305 lb-ft.

 

If people could pull anything on God's green earth with the 460, I'm sure the V-6 can handle a boat.

Edited by Wiggums
  • 8 months later...
Billchevy2019 New Member

Billchevy2019

Posted
Posted
On 7/2/2020 at 9:54 AM, newdude said:

Here is the TSB on the 1-2 shift.

 

I know this was posted some time ago. But this is interesting, just picked up a 2019 Z71 this past December. This has been my experience when I first start the truck and back it out the driveway, and then put the truck in drive. I basically control my throttle and try not giving the truck to much gas until this querk passes basically. The truck drives fine after this.

  • 9 months later...
Elrod New Member

Elrod

Posted
Posted

Bought a 2020 silverado 5.3 new.  8 miles on it.  Has done the 1-2 stall first of the day since new.  Also does the 2-1 clunk approaching a red light.  Had a 2016 that did better but would sometimes shudder like it wanted to cut off at or approaching a stop.  Drivers seat likes to clunk around in the 20 just like the 16 too.  

  • 2 months later...
Gary1996 New Member

Gary1996

Posted
Posted

I just bought a new 2022 Chevy Silverado Z71 and have to the issue of the harsh shift form 1st to 2nd gear every morning never fails you think gm would have a fix for it but I was told that is normal characteristics of this transmission 8-speed that's is B's 

16479108121783563380811996492492.jpg

16479108559445097624726043421338.jpg

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

    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      Declaring victory would upset the demons that possess this Blazer, so I won't. But I did make progress today--after it put up a fight. Always a fight.   I had the day off so I spent the morning cleaning up the shop and I thought I'd get ahead of things by filling the cooling system in prep for the final part I needed to arrive: the driver's side knock sensor. Glug, glug, glug....and then the unmistakable sound of liquid hitting the shop floor. It induces the same chagrin when the sonar and targeting laser temporarily malfunction during a late night bladder evacuation over the toilet with the bathroom light off. D'OH!!! That made a mess...   Oh, hey, that knock sensor I removed? It threads into a wet port. Who knew?! Learn something new every day. Put a pin in that chore, I'll fill it the rest of the way later.   The knock sensor arrived at about 1pm. I threaded it in, connected the wire, filled up the coolant, checked for leaks, and... drumroll.... fingers crossed for a perfect start, excellent timing, model fuel trims, and ...no squeaks... Here goes.....   No, it didn't start. At all. I cranked it a few times and it wasn't sounding good. Furthermore, I heard leaking again. Jesus H Tapdancing Christ, stop leaking all over the dang floor. This time I had accidentally overfilled the coolant reservoir and the churn of the water pump via cranking caused a bit to burp out. Ok, just, breathe... Put the flamethrower down. Dang thing wouldn't burn anyway, leaks too much...   Did you know the rotation of a round crank sensor in a round hole, matters? I do now. Took me about half hour to retrace steps and realize what I had done. Then it started right up.   No squeaks. The squeak was the old balancer.   Once it entered closed loop, fuel trims are dead on, hovering right around zero at idle. No more -30%. I'll credit the injector rebuild on that one.   Timing? I think there's an OBD 1.5 translation error with my Actron scanner. It's anywhere from -20 to -30 at idle, sometimes as high as -40 cruising. Sorry, the engine just isn't running that smoothly at -40 degrees ignition advance. It's just not. It's smooth all through the rev range and has decent power. I'm going to have to trust the seat of my pants on this one.   The new exhaust is very quiet. The old catalytic converter? Not melted, but definitely not healthy. Rains glitter when you turn it on its end...all the precious metal is flaking out. Once the new exhaust system burned in/smoked off a bit, the engine's exhaust smell is normal again. Not that I'd recommend going around huffing car exhaust, but, you know what I mean?   One problem to correct. The new exhaust has the opposite problem of the old spliced up exhaust. It wants to hit the floor where the old one wanted to rest on the cross member. Happy medium, please? Still noodling on that one, need to look at how I can adjust some hangers.   I don't know what's next. On one hand I want to run away from this thing as far and as fast as I can -- there have been a lot of NOT fun moments. On the other, now that it kinda drives nice, maybe drive it around for a little bit?   Shhh... it's not currently dripping oil all over the floor. I can see just a little wet at the bottom of the timing cover where it meets the oil pan seal. It's not dripping multiple drops with every ignition cycle, in fact, after some driving this evening it has yet to even form a drop that could drip off yet. But the weekend is young... I fully expect this could turn into Exxon Valdez by Sunday. Because this Blazer hates me. LOL.      
    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      About that:   Once upon a time in a land far far away lived a car company that was shy about taking your money and wanted to be sure that they gave you more that you asked for so that you'd come back. No really, not a fairytale. 😱   But after the field got thinned out enough to limit the competition it seemed good enough to give you only what you asked for. Fair enough I say but in such a market you have to give something the others are not or they go to the one who does. Gimmicks or glitz. Oh, fins and chrome. Yea, shinny crow like cars. Yum.    Field narrows a bit more and 'brand loyalty' becomes a thing and the minute it does they start thinking to themselves, "Could we make more money if we gave them less than they expect and they will hang in there for brand and comfort with the known?" They gave it a try and da*n, it worked!!    Well, what if we teach them, groom them into believing that less is "Normal" and cut some more corners. Will that work? Oh heck yea!    🤔 I wonder, can we give then WAY less than they expect and make them mad enough to spit nails and STILL get them to pay up? Sure, if we get everyone else to do the same so that the choice is less or nothing at all. How would be do that? Platform sharing.  What a concept, right?  Steal like there is no tomorrow and it's legal too!    Truth is no one is going to give up driving, not for very long. The Gen Z crowd is fine with it and will be as long as someone not Gen Z will haul them around. At some point we all die.    Economic voting only works if you cast a NO vote now and again and enough of them to get dumb and dumber to wise up. Well, that's how I was taught anyway. And it should have worked. Would have worked. But the Bail out!!   Look, you have another choice if  you take that bag off your head. If the dumb it down to some predetermined expectation of how John Q Public will use it the, that is under design it to failure they you use it to a lower stress mode. D'ho!    A 1950 Royal Enfield Bullet 500 will go anywhere a Suzuki Hayabusa will and for just as long. But you will have to treat it for what it is and not for what you wish it was. 
    • Vu1can
      Bridgestone vs Goodyear tires?

      By Vu1can · Posted

      Maybe I was just too unlucky, but I had nothing but bad luck with Bridgestones. Out of 3 sets, they all started losing a lot of air when they got down to about 1/2 tread life, and at that point also wet traction suffered more than it should have. Also, the only tire I ever had in my 60 years of driving that had a side wall blow out was a Bridgestone.   I'm currently running Goodyear Wrangler Workhorse AT and am very happy with them.   
    • davester
      Broke Down on the Mountain

      By davester · Posted

      maybe when the trip is over, check all the other joints in the front end, like all the ball joints, tie rods, pitman & idler arms, etc...
    • Carlos Eduardo Silva
      adding 360 surround view, UVI (Trailer Camera) package to UVS (Surround/invisible Trailer) Upgrade 2020 Silverado RST

      By Carlos Eduardo Silva · Posted

      Thks, and actually it was my bad, because here in this post there is someone showing the correct wire position as well. My bad... But thank you a lot with the help as well. I was able to find and buy a 10 channel VPM that came from a sister silverado of mine. The same year, same mode, same trim, same everything. 2022 Silverado 1500 LTD LTZ (pre-refresh). I also found to buy just the bottom mirror part that has the cameras, so way cheap than the full mirror. + a used front camera. I did test everything together, cameras, cables and the VPM.... everything worked EXCEPT my original Bed camera and the backup grid lines. I think the reason is because now I need to do the VPM reprogram. I sent a msg White Automotive & Media Service to confirm that it is the problem and that they can do it service for me case.   Once I get it 100% done I will post here result....

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...