I have clunk sounds or bump when my car gears down to 1st when rolling to a stop also makes a bump noise when its under light throttle in 1st to second .Or in 4th sometimes when your rolling on the street with your foot off the gas and it decides to shift at very low speed.
It shifts very smooth and pulls hard at 1/4 or more throttle like it always has sense new.NO CLUNK OR BUMP THEN JUST FUN SO WHAT IS IT?