Jump to content

Torque converter problems

sierra740

By sierra740
in Troubleshooting & Recalls

 Share

Recommended Posts

Shawn Hixenbaugh New Member

Shawn Hixenbaugh

Posted
Posted

I have 15 sierra 5.3l 6 speed 72,000miles and noticed my rpm needle jumping a couple 100 rpm the coming right back down again and keeps doing so . Does this only in 5th gear. Took to my mechanic he hooked it up to computer and nothing came up wrong. Had him do Trans service couple metal shavings were found in the pan and good amount of fine metal dust. Truck is still acting the same if not worse. Mech recommended transmission replacement. I'm at a loss. Any info would be appreciated. Thanks all

JimCost2014 Senior Enthusiast

JimCost2014

Posted
Posted
5 hours ago, Shawn Hixenbaugh said:

I have 15 sierra 5.3l 6 speed 72,000miles and noticed my rpm needle jumping a couple 100 rpm the coming right back down again and keeps doing so . Does this only in 5th gear. Took to my mechanic he hooked it up to computer and nothing came up wrong. Had him do Trans service couple metal shavings were found in the pan and good amount of fine metal dust. Truck is still acting the same if not worse. Mech recommended transmission replacement. I'm at a loss. Any info would be appreciated. Thanks all

Welcome to the site.

 

Any vibrations? Does your mechanic have the ability to shut off the torque converter while driving? Easy way to tell if it is going out, very common problem with the 6 speeds at your mileage.

Ozer Enthusiast

Ozer

Posted
Posted

You may have seen my posts in other related topics but here is what mine did..

On my 2014 i had experienced the same symptoms, shudder in low RPM, especially going up an incline. I thought it was a misfire and after getting that ruled out i took it to the dealer and they confirmed that it was the TQ. They pulled the pan out and chunks of metal was stuck on the magnet. They said new trans is needed, $5300 out the door.

I got the truck towed to a local trans shop and got it rebuilt with better parts and some mods for $2700 cash. 

 

If you are still under warranty def get it to the dealer for a replacement. 

burtonlane New Member

burtonlane

Posted
Posted
On 4/17/2020 at 9:05 AM, Ozer said:

You may have seen my posts in other related topics but here is what mine did..

On my 2014 i had experienced the same symptoms, shudder in low RPM, especially going up an incline. I thought it was a misfire and after getting that ruled out i took it to the dealer and they confirmed that it was the TQ. They pulled the pan out and chunks of metal was stuck on the magnet. They said new trans is needed, $5300 out the door.

I got the truck towed to a local trans shop and got it rebuilt with better parts and some mods for $2700 cash. 

 

If you are still under warranty def get it to the dealer for a replacement. 


Hey there I’m currently having all the same issues with my 17 z71 90,000 miles. Local trans shop said rebuild would be $3,000 with upgraded torque convertor. Curious what was the warranty on the $5300 installation at the dealer. I’ve noticed the fluid looks brown and notice some fine metal shavings on the dip stick. Just baffled that such a new truck is commonly having early trans issues. 

  • 4 weeks later...
Mileguru Enthusiast

Mileguru

Posted
Posted

My truck was experiencing pain, itching, and small sores one it's fuel line, so I contacted DR. OSO.

CURED! Truck runs like new again.

  • 8 months later...
  • 1 month later...
Dan R Enthusiast

Dan R

Posted
Posted

Seems to be a common problem. My torque converter just failed and took out the transmission. Is there an appropriate place to report these kind of issues?  I always hear "there has been thousands of complaints of problem xxxx" but don't know where to report the issue. I imagine most pre-mature failures go unreported. NHSTA has a complaint section but that looks like safety related only. Just wondering if there is another agency that collects this kind of data.

  • 10 months later...
afireinside7444 Enthusiast

afireinside7444

Posted
Posted
On 4/16/2020 at 6:14 PM, Shawn Hixenbaugh said:

I have 15 sierra 5.3l 6 speed 72,000miles and noticed my rpm needle jumping a couple 100 rpm the coming right back down again and keeps doing so . Does this only in 5th gear. Took to my mechanic he hooked it up to computer and nothing came up wrong. Had him do Trans service couple metal shavings were found in the pan and good amount of fine metal dust. Truck is still acting the same if not worse. Mech recommended transmission replacement. I'm at a loss. Any info would be appreciated. Thanks all

 

I am having this exact issue. At cruise 40mph was getting small blips of 100 to 200 rpm with minor shuddering. Assumed it was bad fuel (just filled up) or bad plug wire. Then about 2 hours later at a intersection would not move in D or R. After a min i got it to limp into a parking lot. Towed to shop no CEL or anything obvious. After talking to my tuner (Diablew tune) and pointed me to a convertor i called the shop who is now going to drop the pan and look ($175 fee if not.......) after sitting they said its running fine now. But blaming my tune thats been in for over a year

James Beyer Enthusiast

James Beyer

Posted
Posted

Shame on GM, they built a shabby 8-speed transmission/torque converter, and continue for years knowing that a Large % of them are going to Fail at or shortly after, the warranty is over.  

If GM actually cared about customer service they would recall ALL these 8-speed transmissions, inspect and replace with Quality Product.

 

Just my 2 cents-

pokismoki Senior Enthusiast

pokismoki

Posted
Posted

the transmissions are engineered to fail by GM due to epa enviromental mandates by the Feds.

 

they dont want your in your truck more than 80,000 miles , buy a new one is the direction they are pushing you.

 

the pre-failure fixes are well know on this site use the search bar, as the same failure points directed at the 6 speed are implimented on the newer transmissions

 

 

pokismoki Senior Enthusiast

pokismoki

Posted
Posted
On 2/21/2022 at 10:24 AM, afireinside7444 said:

 

I am having this exact issue. At cruise 40mph was getting small blips of 100 to 200 rpm with minor shuddering. Assumed it was bad fuel (just filled up) or bad plug wire. Then about 2 hours later at a intersection would not move in D or R. After a min i got it to limp into a parking lot. Towed to shop no CEL or anything obvious. After talking to my tuner (Diablew tune) and pointed me to a convertor i called the shop who is now going to drop the pan and look ($175 fee if not.......) after sitting they said its running fine now. But blaming my tune thats been in for over a year

your tuner doesnt know what he's doing otherwise he would have corrected the issue in the software. and told you what parts need to be upgraded

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

    • AlVeron
      Manufactuer's Defect - Paint Failure - Cherry Red High Country 2021 Suburban

      By AlVeron · Posted

      This is NOT impact damage nor neglect. There were previous class action lawsuits because of such paint preparation st GM manufacturing plant. Not just the Cherry Red Color. This paint is applied in three processes to obtain the desired color.  The manufacturer will cover for 36 months or 36k miles only. That rust is actually corrosion because of the paint process failure. Corrosion is covered for 100,100 miles or a certain months. However their corrosion doesn't include this type. Go figure. Clearly manufacturer knew from previous paint issues. This started 3 weeks ago out of the blue.  
    • richard wysong
      Wow I'm in a pickle. (Broke down truck) and a story.

      By richard wysong · Posted

      Is it time to put a piece of tape over the CEL? 
    • davester
      2015 Silverado 3500 right rear turn indicator failure

      By davester · Posted

      consider doing electrical testing?  I would guess some power or ground wire/connection has a problem.   alldata.com has wiring diagrams, connector pinouts and diagnostic procedures you can use to find where the problem is.
    • davester
      My First Project and GMC has me stumped

      By davester · Posted

      can you tell if the reader is actually trying to get codes, and the pcm is reporting none, or is your reader just silently failing because it's not communicating with the pcm?
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      Any joy with this truck seems to be short-lived.   The CEL for P0172 ("bank 1" too rich) is now "intermittent".   I'm not sure where to check, or re-check, and my energy to keep chasing problems with junk is wearing thin. The P0172 seems to set as I'm coming to a stop, completely off the throttle, when fully warm. At least, that's what it's done the 3? times it's set.   Everything appears normal on the scanner EXCEPT long term fuel trim. There's only one bank on this vehicle because it's an OBD 1.5 with only one upstream O2 sensor. At idle, it's around -16.4% and will dip to -18% occasionally at idle or off-throttle. LTFT approaches 0 when throttle is held at 2500rpm. Short term appears normal, much closer to zero all the time. The LTFT tells me the engine is running rich at idle but compensating at higher load. But, why?   The EVAP purge valve doesn't appear to be leaking/sucking fuel vapor continuously. Is it sticking just as I come to a stop and the engine is choking on fuel vapor and sets the P0172? But that doesn't explain the persistently negative LTFT. Disconnecting the purge valve doesn't seem to make any difference.   I suppose that leaves another dang issue with the fuel injector. A leaking fuel pressure regulator, a new leak in the spider, or a leaking fuel injector/poppet valve I didn't see, or a small crack in one of the spider legs.   The vacuum line leading to the fuel pressure regulator doesn't have raw fuel in it. It doesn't even smell like fuel when it's pulled off, not until you suck air through it, then you can tell it leads to a fuel component. I'd consider that normal? Nothing is signaling this is a FPR issue from the outside, at least.   The oil smells like fuel but it's not building volume. I've noticed most oil in most engines smells like fuel to some degree so it's hard to say if the smell is an issue or not. Or if the engine just still smells like fuel because the crankcase was full of it a few hundred miles ago. But it's been changed twice since that original issue of the leaking fuel line dumping fuel into the intake.   Patience is running very thin. Every win seems to be accompanied by two steps backwards, or another issue that leads to removing at least the top half of the intake manifold. Enough! LOL

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...