Some times when shifting from 1st to 2nd, I would say about 30-40% of the time, the van shutters bucks or what ever before it shifts into 2nd. About a year and a half ago. the van got stuck in 2nd gear and the dealer i bought it from (CarMax) paid to fix it they re built the valve body and replaced the solinoid pack. After that it would shift fine but still would shutter and buck on the 1st-2nd shift. Any idea on what it could be?

Should i worry that the trans may go out? There are no warning light or anything on.


thanks, jason