The gear often gets stuck on my IS. Not sure how to explain this, but sometimes when I press down on the accelerator, the RPM rises but the car fails to go forward. Then all of a sudden the gear kicks in after a long delay. Can anyone explain?
sounds like 1 of 2 things, the tranny is going up, the valves inside are sticking, or one or more of the brake calipers are sticking, if this is from a stop.
if from a roll, it is probably just trying to select a gear.