I have a OEM stock tranny that as of a few days ago i noticed when shifting from park to any of my gears it takes about 3 seconds to catch before truck starts to move. I commute 75miles a day all HWY and it never has given me trouble there and it still performs as usual other than this delay to "catch". The tranny filter and fluid were done about 30k miles ago and the fluid still looks great. I dont haul to much, but the occasional bed of building materials. I am very comfortable working on this motor but transmissions are completely foreign to me.. any suggestions or thoughts?