Jump to content

How many miles on your 6l80 trans?

alvocado
 Share

Recommended Posts

alvocado Enthusiast

alvocado

Posted
Posted

I'm curious how many miles folks are getting out of their 6l80 transmissions. I've maintained my 2011 Yukon from new with 50k mile transmission fluid and filter changes and it just left me stranded 300 miles from home at 219k miles on the odometer. No warning signs until the day of the trip when it started clunking a bit then wouldn't shift at all when getting back on the highway. I managed to get it to shift into fourth gear for a 3 mile drive to a dealership lot off the highway where it sits, 5-1/2 hours from home. 

 

  • Like 1
Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
1 hour ago, alvocado said:

I'm curious how many miles folks are getting out of their 6l80 transmissions. I've maintained my 2011 Yukon from new with 50k mile transmission fluid and filter changes and it just left me stranded 300 miles from home at 219k miles on the odometer. No warning signs until the day of the trip when it started clunking a bit then wouldn't shift at all when getting back on the highway. I managed to get it to shift into fourth gear for a 3 mile drive to a dealership lot off the highway where it sits, 5-1/2 hours from home. 

 

 

I'm guessing you mean, "How many miles until yours failed"? :dunno:

In case you just asking how many we have on ours.....

I'm at 186,000 and still doing well. 

  • Like 1
alvocado Enthusiast

alvocado

Posted
  • Author
Posted

Apparently imminent failure is expected. The transmission shop where mine is headed said they do 20+ 6l80 rebuilds per month.

Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
8 hours ago, alvocado said:

Apparently imminent failure is expected. The transmission shop where mine is headed said they do 20+ 6l80 rebuilds per month.

 

Did they tell you that it's the converter killing the transmission and not the transmission failing? 

 

https://floridatorqueconverters.com/Torque-Converter-77-JMBXTSD.html

 

https://www.sonnax.com/tech_resources/845-6l80-6l90-transmission-tech-advisory-consider-an-updated-converter-in-your-next-rebuild

 

https://www.sonnax.com/parts/5187-jmbx-performance-converter-kit

alvocado Enthusiast

alvocado

Posted
  • Author
Posted

Yes, it was the torque converter. It's being rebuilt now and it's loaded with metal frag. 

IMG_3757.jpg

  • Like 1

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

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,866
    Total Members
    8,960
    Most Online
    Greg3160
    Newest Member
    Greg3160
    Joined

  • Who's Online   2 Members, 0 Anonymous, 476 Guests (See full list)

  • Latest Articles

  • Posts

    • MANGOAL
      Mangoal or FitcamX OEM Dashcam?

      By MANGOAL · Posted

      Late reply, but yes—it works on the SLT trim. Compatibility comes down to the plastic shroud shape behind your mirror, not the trim badge itself. On the SLT with auto-dimming, it uses a plug-and-play Y-harness off the mirror/rain sensor power, so no need to run wires down to the OBD port. If anyone's ever unsure about fitment, just drop a photo of your mirror housing and we can double-check it.   Appreciate the detailed feedback on the install! On the windshield glare—we actually took feedback like yours and developed a dedicated CPL (polarizer) filter to cut down dash reflections on sunny days. If you're still running the cam, shoot me a DM. I'd be happy to send a CPL filter over for you to test out—no charge. 
    • davester
      2002 GMC Yukon

      By davester · Posted

      There are no stickers in your glovebox?
    • davester
      Weight limit in bed

      By davester · Posted

      Look at the numbers on the stickers in the door jam...
    • EJS2015
      Actual Full Screen CarPlay on Refreshed Silverado/Sierras.

      By EJS2015 · Posted

      Yes, every time the developer updates his code, you must recompile. I will private message you with the latest because it changes pretty much with every version.
    • Grumpy Bear
      Transmission Temperature Hitting 220s

      By Grumpy Bear · Posted

      After I wrote that reply I went for a ride. 85 F out. So trans started at 85 F and it shifted the same as it did an hour latter at 168 F. I've never actually recorded the to cold to shift point but it is under 32 F before they start hanging on to a lower gear or leaving the converter unlocked. Both intended to heat fluid.    Yes, brake or bake. Absolutely.      Your welcome. True research ended decades ago. Field trials are still in play.    There is a thing called oxidation onset temperature. This is the heat related oxidation not the O2 exposure kind. For mineral oil that starts at 140 F. So what happens after 140 F? Each 20 F cuts fluid life in half! Does using a Full Synthetic improve that? Yes! By how much? Depends on the base oil type and a few other factors. But enough to notice. Some esters are even higher. There are even synergies between types the will raise it higher than any one component is alone.    Then there is "Hindered" oils. Antioxidant additives. Hindered Polyol Esters can sit at 500 F for years in a turbine.   When a blender brags his oil will 'take 500 F" in service he doesn't specify for how long. Water will dance on a 500 F hot plate for several seconds. @newdude put up a chart showing the relationship between fluid temperature and it's life in an automatic transmission. Here's a version of that chart for Group III based oils. These temperatures are those in the pan as observed as 'normal'. that is you drive as you do for as long as you do under what load you ask of it and whatever that temperature is this graph applies to. Flash temperatures of a few minutes isn't what his means.    Note that fluids held at a constant 240 F have a service life of only 20K miles. 220 F explains the factory exchange limit, eh? My equipment I keep under 180 F and I'm good if the cooler will hold it as low as 140 F. But that's me.   

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...