1993 Isuzu Rodeo Check trans light when stopping
 

Seems like something is stuck. This dont happen all the time, but it happens about 1-in-5 traffic light stops. when the car stops i can feel a little click in the tranny. Then the check trans light begins to blink. To fix this, all i have to do is to turn off the car, then simply turn it on again and the problem is fixed.
Any idea what this may be and how it could be taken care of?
thanks!