I'm using a 96 Dakota drive train in my 49 Dodge truck. It is a 318, OD auto, 4x4 drive train and I'm using everything except the front and rear axles from the 96. One of the 96 transmission cooler lines has a check valve in it (I assume its to stop converter drain down). It appears to be functioning correctly (the truck only had 44,000 miles on it), I have flushed out both lines, and I will be replacing the filter and fluid. I've heard the check valves plug up and cause the trans to overheat and fail. Should I keep the check valve, or remove it from the line? Gene