I just had my 700R4 rebuilt with a shift kit, cooler, and all the other goodies. I also installed a TCI Saturday Night Special 2000 stall converter. I'm a little confused on the lockup. Does the converter lockup or is it a nonlockup. I'm going to be doing alot of highway driving so the car with be in OD alot, isn't this when you need the lockup the most. I don't want to overheat my brand new tranny.