Was driving my truck and out of no where the truck feels like its being held back. I figured maybe the brakes are hanging up, the truck would feel like being held back then felt like it unlocked again with no resistants then back to the brake hanging up again. It was not my brakes i guess, they did not smell, I looked under truck and smoke was coming out, transmission fluid was leaking all over the driver side of tranny and t case. Im at a total lose here i have no idea what could have caused this, the tranny always shifted great. Please help!