Jump to content

8 speed garbage


Recommended Posts

Posted

In response to your concern GM increased the transmission warranty from 100,000 miles to 60,000 miles in a show of product confidence.

Lol

 

Sent from my SM-G955U using Tapatalk

  • Replies 58
  • Created
  • Last Reply
Posted

If the truck was built last fall and doesn't have the Jan/Feb 2017 update, there is a good chance the programming update will make it better.

 

Earlier updates were not so successful.

Posted

Manufacturers cant make a smooth shifting tune to meet the epa requirements from what im told. There programmed to shift to 6th asap, but when you smack the throttle your generally switching from v4 to v8 And dropping a few gears.

 

Sent from my SM-G920V using Tapatalk

This makes sense to me.

Posted

I'm calling dealer tomorrow about the update for mine. Been meaning to and just haven't yet.

Posted

My brother has a 2017 Sierra SLT w/NHT CC 6.2L w/8-sp. 4wd. Has about 12,000 miles and no problems with transmission shifting and they pull a boat around a lot. They love the truck, not one issue since buying it new last fall. Funny how some have no problems while others are not happy.

Posted

My brother has a 2017 Sierra SLT w/NHT CC 6.2L w/8-sp. 4wd. Has about 12,000 miles and no problems with transmission shifting and they pull a boat around a lot. They love the truck, not one issue since buying it new last fall. Funny how some have no problems while others are not happy.

Same here

Got my '17 NHT in October, 17k on it now shifts great

My moms '17 Denali was built the same month and hers is fine as well

 

OJ, just go back to jail...............

Posted

Same here

Got my '17 NHT in October, 17k on it now shifts great

My moms '17 Denali was built the same month and hers is fine as well

 

OJ, just go back to jail...............

Its the same color as my bro's

Posted

Some people know how to drive, others still have to learn...

So your telling me I don't know how to drive?????

Posted

Some people know how to drive, others still have to learn...

Along with hundreds more????? Shut up!!!! I have to almost burn tires on take off to make it shift good. Then coming to a stop it jumps gears then at a stop it finally hits first and jumps forward. Do you want to pay for all our tires and brakes???? Fell free to pay for mine!!!!! I've had several gm vehicles and they wasn't anything like these.

Posted

Glade some has good trucKS but some of us have a good truck but tranny isn't. Mine is hit and miss but more bad than good. It has its days and that's what is strange to me. But it still runs good and wants to run all out. But I can't run all out the most of the time.

Posted

I took mine back today to see if there is anything that can be done.

 

Hard 1-2 and hard downshifts as you slow into a stop sign. May have to live with this as I had the newest update with little change

 

Mine too has good days and bad. Right when I think it may be okay it acts up again. Mostly bad days though and really bad on the first drive of the day.

Posted

So your telling me I don't know how to drive?????

 

 

Along with hundreds more????? Shut up!!!! I have to almost burn tires on take off to make it shift good. Then coming to a stop it jumps gears then at a stop it finally hits first and jumps forward. Do you want to pay for all our tires and brakes???? Fell free to pay for mine!!!!! I've had several gm vehicles and they wasn't anything like these.

 

 

Glade some has good trucKS but some of us have a good truck but tranny isn't. Mine is hit and miss but more bad than good. It has its days and that's what is strange to me. But it still runs good and wants to run all out. But I can't run all out the most of the time.

Thank you.

Archived

This topic is now archived and is closed to further replies.

  • Latest Articles

  • Posts

    • Engine failure requires radiator replacement per GM if it contains an engine oil cooler.  They do NOT want them flushed.  Radiator replacement is also required for the 6.2 recall if the engine fails.   Here is the TSB the dealer is referring to - 22-NA-074 1..2    Its a slightly older version, but the current version of it covers all model years 2000-2026.  So if enough failure debris was present, it gets an oil cooler.  If that is part of the radiator, it gets a radiator.  Also, same for oil cooler lines.  Those get replaced.     Now something like a 2.7 Turbo which uses an oil to water heat exchanger for the oil cooler, the radiator would be left alone but the oil cooler would be replaced, as well as any lines.  
    • Doing the right thing, replacing both valves is the way to go. The valves with the ball leak far more often than the schrader. Never cared for them. The accumulator really should be replaced if the system has had no pressure in it and it was a keeper, but since you're looking to sell it, bet you can get by. Did you pull the orifice screen and see what was there?   Shame you can't get 134a. Hopefully the previous repairs included dye.   Some of the R4s I messed with developed leaks where the line sets connected or the front seal. Had one where the HPCO was leaking. Front seal would only leak under pressure. See any obvious oily spots?   I've got nitrogen I use to test pressure and to help dry the system prior to evacuation.   Keep up the good work
    • Next time you're on a road trip to a state where you can still buy it stock up on 12oz cans, you might look into getting certified so you can buy it where you are as well. When they switched from R12 to R134a the test for certification was easy, they basically just wanted the $25
    • Getting greedy...   The AC pump has been replaced at least once per service records, and it's been recharged twice since 2018 or so, in approximately 2 year intervals between those charges.   It was done at the same shop...clearly they were enjoying the revenue of recharging the system periodically versus actually tracking down and fixing the leak. I learned that the owner was 88 years old when she passed in 2023, so maybe they assumed only a temporary fix was needed anyway.   The system is basically empty now, the compressor spins freely, so I'm guessing it "just needs a recharge".   I vacuumed it down, and it has basically held overnight. Doesn't appear to leak under vacuum, check! So it must leak under pressure. I don't have a way to pressurize the system and pressurizing it with shop air wouldn't be great for the air dryer (which is probably toast anyway?)   The dryer (accumulator? I'm not an AC expert) has a Schrader valve, but the high side has an old ball-type valve, which are notorious for leaking. It's clearly had schmutz blown out of it at one point because the line/area next to the valve is coated old black crud, which I assume is AC refrigerant residue/oil, or maybe even dirty dye. I think I'll roll the dice and replace the valves. I have a black light around here somewhere so I'll find it and shine it around the engine bay in the dark to see if there's any dye.   I can't think of another way to track down the leak other than injecting some dye (if it doesn't have any) and having it charged up. We can't buy R134a off the shelf here anymore, so I'll run it up to Jiffy Lube and have them do it. I think I have a coupon. At the very least, the charge should last long enough for a year or two, according to history. I think this truck will be long gone by then. But cold AC is a selling point.    
    • Got the truck back today.  Called them yesterday to get an update, and miraculously my truck is finished?!?! The $13k out the door was complete bullshit!  Ended up being over $14k.  They added some bullshit service bulletin that I cant even find, where they replaced my radiator without telling me or asking me, and charging me for it.  Need to do more research into it, cause they leaked the first delivered radiator was ran over by FedEX.  Sounds like bullshit to me. 2.5 Months for an engine swap, which ended up being remanufactured, not new; ****ing ridiculous.  Brakes are squishy as hell, not sure if its from sitting.  Will give a couple days to see it that figures it self out.  GAVE IT BACK TO ME WITH 1 GALLON OF GAS!  Just filled the tank the day before drop off, more bullshit.  My dash cam SD card was formatted, not really much I can do about that. 3 year, 100k GM warranty at least.  Time to sell it and say **** off to GM.  Bad experience.  Cant wait for the survey email to come through.  Overpriced Raptor R, here I come!
  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...