All I know about the lock up box is, my tires get greasy feeling in gears they wouldn't have before:woott:
Seriously though, even the wife felt the difference, she said it feels like it hooks up stronger and pulls harder, I fully agree, I was impressed that she made that deduction, as evident as it was. I now have bigger traction issues with my front tires while attempting boosted launches, and it feels as though there is more weight transfer happening, due to more tq making it to the wheels sooner, I would guess. All in all, I really like how the BT dieselworks l/u controller works, I'm still playing around with lock up delay programming to try and dial it in, but I think it's a valuable upgrade.