Up here in my area of the world where it gets quite cool (it was -18 deg C yesterday morning), it can take a considerable amount of time before the trans. gets to the temp required for torque convertor lock-up (took 10 mins of city driving yesterday!). Would be fantastic to not have to wait for that magical temp (22 deg. C in my Sierra apparently) to come along before being able to enjoy the work I put into getting the shifts & convertor lock-up's just right. Its a small thing, but an annoyance I'd like to be rid of in any case!