I think ineed a trans for my 2001 Dodge 2500 Cummins diesel.The one that in the truck now is ok but it shifts wierd.When driving the truck and taking off from a stop i have to build the RPMs up to about 25 grand then left off all the way and hit the gas agin then it shifts but after it shifts i can punch it and it kicks downs a shifts nice and smooth,It pick up speed pretty good.If anyone has had this problem befor or have any clue what it might be or what i could do to fix this lt me kno.I would greatly appreciate it.