Today while driving to work my transmission warning light came on. Once in a while the tac would drop to zero RPMs. While reading zero and idling up to a stop light the truck would start to chug. The tac would start to read normal and the then no more chugging. 2002 auto 4x4 stock. Any ideas?

 

Check for codes. Sounds like cam sensor may be killing itself.

 

ok, i will check for codes. thanks