sometimes when i take off in my car in second gear like a cloud of smoke comes out from the bottom of the car it never came out of the tail pipes and its only in that gear but in complete stop i rev it and no smoke or in any other gear it always in 2nd gear why what could this be

 

What color smoke, and do you have any leaks anywhere on the car?

 

sounds likea pcv sorta mine was leaking and driving me crasy i cleaned both sides and sealed it in