Maybe you are waiting too long to dump some flaps in? Maybe you need to slip it in just a bit if you are too high? Maybe you aren't extending your downwind enough? Its hard to say. If you know what you are doing wrong then chair fly the right procedure until you are sick of it and can do it in your sleep. What is it that seems to be troublesome to you? I have the opposite problem sometimes... One of the aircraft I fly literally drops like a rock when performing power-off 180s so you have to immediately throw the mixture are prop full forward and get you gear down while making a turn towards the runway or you will never make it. You end up being about 500ft on base whch is already cutting it close.