whats up truck?

[powerhour]

so my 07 dodge 3500 diesel (5.9L) is having a few problems....when im in drive and stopped, foot on the brake sometimes it feels like i get hit from behind and it jerks forwards, im thinking it might be my transmission and also our battery keeps dying and it takes like and hour to jump it , my wife took it into the dealership and they said they couldnt find anything wrong with our truck...what do you think it could be? i checked my alternator and its fine, they also checked our batteries and they are fine as well so i dont know whats wrong

 

[HemiBabe]

Not too sure on it jumping but as for the battery sometimes even if it's tested and it comes out good, it can die pretty quick.. just goin bad prolly my guess would be to just buy a new battery or borrow a newer one from a friend if you could just to test it out and see if that's what the problem is....