Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Has anyone replaced the 6L80 Torque Converter with the 6L90

Recommended Posts

On 1/15/2020 at 3:48 AM, AdioSS said:

I’ve been wondering how this would work. Did you get it back together? Any updates?


On 1/18/2020 at 6:25 PM, RACERX7775 said:

Yeah. No posts to update us.. just checked, that only costs about $250 ish. Compared to circle d at $900. 


I'll have an update for you all soon. I had to put this on the back burner for awhile because we started up a company and COVID hit NJ pretty bad. 

  • Like 1
Link to comment
Share on other sites

Sorry to hear that. 

Years & years ago when the 4L60E was pretty much the only automatic transmission option for RWD GM vehicles someone figured out that the S10 spec converter was looser than the one specced for the B-bodies. So several people were able to get a “better” factory converter through GM dealerships, especially when they blew the transmissions & had them replaced under warranty. 

Link to comment
Share on other sites

  • 1 month later...
  • 2 months later...
  • 3 months later...
  • 4 weeks later...

This video info includes that there is the potential failure for the CTSV/ZL1 converter also. It is a different design than the stock truck JBMX, he swaped in a JMDY which is not the same design. I am running the ctsv in my 2015 Silverado and removed 1-4 lockup. Shifts great and am now in the process of logging trans data to continue tuning shift and pressure specifics. Less than $500 for all the parts to do the swap including fluid and filter change.


  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.