TCC lowering mph

Trying to get my converter to lock up at a lower mph. It is locking up at 60 right now. I did check my tire and gears on the wizard. They are correct and my speedometer on the truck and the scanner match. I have been playing with the release and apply. Before it would unlock if you gave it any throttle at all. Now it stay engaged like I want but just need the speed correct on it. It is a 4l80e 3800 stall with a HD transgo in it. I got it shifting good. I 'm still tuning the motor so I have not been able to get on it to see how hard it shifts in performance mode. The motor does have a pretty big cam if that matters. Thanks in advance.

bump

Make the changes to your Trans Rev/mile. The way you had it, the calculated tire size was only 19.59 inches tall.

Russ Kemp

Will that make my speddo wrong? Right now it is dead on. I put the 27.09 in the wizard for the tire size. Before I had it screwed up and reading a 34" tire.

No, it won't affect the speedo. It is for the speed that the trans shift points are based on.

Russ Kemp

3,839.9412 is what my tuner has in it. What should it be for a 27.09 tire?

Look at the pic in post #3

Russ Kemp

That is weird, when I open that tune it says 3,839.9412 but it said something else on his. What should it be?

Brah.

The picture is post 3 says 2,776.8163.

Give that a whirl......

Worked like a champ. Thanks