Does this create other problems, though, like a system that never gets hot enough? Cold starts, rough shifts, etc?The transmission has a thermal valve that controls the fluid to the transmission cooler. The fact that it does not open until the fluid reaches a certain (high) temp. is the issue. The "fix" is to remove the valve to allow the fluid to flow between the cooler and the transmission unmonitored...therefore the fluid does not reach the high temps. needed to open the valve, and stays at a cooler temp.