Hello,

Working on some basic 6L90 tuning and I getting confused with torque converter lock / unlock speeds. Also some other simple questions that need clarification....

1) TCC Adapt. What is it? and should I simply disable it by changing the Temp or speed parameters?

2) TCC pressure. Regular gain and regular offset...? I have read to move the offset to 100 and the gain to 1.0 (current I have them set at 50psi and gain at 1.5 - a slight bump from stock of 27 I think), but I have also read that this transmission can build too much pressure on the clutch disc (or something). What I think I understand is the regular offset in the min pressure. And the gain is how fast it ramps up pressure with slip, but why would bringing the gain down increase that? please clarify.

I currently have the TCC desired slip mostly zero'd out except for slower speeds in 1st and 2nd. My goal was to reduce chuggle and possibly save some wear on the TCC clutch. But I wouldn't mind some further insight on this. (I have not reduced chuggle by doing this)

3) TCC apply speeds. TCC apply - this seems simple enough... the speed at which the TCC locks the torque converter in 1st, 2nd, 3rd, 4th and so on. I assume we would want these numbers a few mph above the shift point - shift, then lock up. Simple enough except that I have already zero'd out the desired slip... so the desired slip must only be for "locked" conditions, or could there be a contradiction here ?

Is the TCC staying locked through upshifts ? or does it unlock automatically for a shift (no table to adjust) ? I will give an example from the stock shift tables at 44% throttle: TCC 3rd apply, 44% throttle is 29mph. 3-->4 shift, 44% throttle is 45mph. The 44% TCC release is 21mph... so that wouldn't release until we slowed to 21 mph at 44% throttle - maybe going up a hill or something.

I am part confused because there is a thread indicating that you set the TCC release speeds just before a shift. But that wouldn't make sense based on the stock table settings. Actually I think it would need an additional parameter to adjust.

Thanks for all your help.
Clint