Torque converter - replace or let it be?

Geotrash said:

As some of you may be aware, I’m on a mission to make our 2012 Yukon xl Denali a reliable towing rig for the long haul. Next on my list of obsessions is the transmission - specifically the torque converter since they have a tendency to let loose and take the transmission with them (6L80). We have about 8k towing miles planned with a 6500 lb camper behind it this year - much of it in the mountains. With 118k on the clock is this something worth being proactive about and upgrading, or let it ride for another year or more? Any betting people out there?


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Foggy said:

Do the converter before the clutch in it takes a shit and takes out the rest
of the trans with it.. You can get a better TC - not necessary for a higher stall..
But a better lock up clutch and better built... Your towing will finish off
an already well worn in TC in the 6l80e

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swathdiver said:

After four years of ownership, I only just recently learned of this well known problem! Change the fluid every 45K miles and or after a long haul such as you described. I looked up the problem and Sonnax mentions that the case half that bolts to the flex plate is too thin which causes the problems. My own plan is to purchase a new JBMX converter and the Sonnax parts (for towing, no racing) and have it built probably when the transmission is overhauled. I'm leisurely chasing an issue where the converter doesn't always lock up below 45 mph and if it turns out the converter is doing that and not the computer, may replace it sooner.

Where are you heading?

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