I've been told I need to upgrade the cooler on my 4L60e is prone to early failure and I need to put a cooler on it. I've been told at least 24K and 40K. That's a big range in capacity and price. I'm having a hard time deciding where I need to be in that range. Does anybody know how big the stock cooler is? Maybe if I knew where I'm starting it would be easier to decide where I need to end.

Thanks.