04 Tacoma 2.4L automatic trans.
Truck runs and idles great. Just noticed this morning with engine cold when I take it from PARK to REVERSE or PARK to DRIVE truck makes a knocking sound. Can't seem to pin pint it's location. Almost has the sound of a loud valve tapping. Does not do it in PARK. Doesn't do it with engine hot. Appreciate your input. Also have no fluid leaks of any type. Thanks, Roy.
Will be glad to donate if your answer corrects my problem, thanks again.