[PrerunnerGreg]

Usally the tranny will have the tourque converter locked-up when cruising at a steady pace, and when you shift into another gear it will unlock the converter then lock it after a few moments. It will feel like two distinct shifts but it is really in the same gear. Most modern trannys will only lock the highest gear selected, 5th, if drive is selected, or 4th, if its "locked" in 4th. But it won't go into lockup in 4th if 5th is selected. I hope I haven't confused anyone. BTW, for those not familiar "lock-up" is not in the trans itself but in the convertor, when "locked" there should be no slip between the motor and trans.