"05" Transmission Problems

[emorybuckely]

Hi im new to the forum just got a used 05 2500 quad cab CTD bought 3 months ago my problem is from a stop goin real slow threw like a neiborhood it seems to go back and forth between 1st and 2nd really fast till i step on the gas than it goes to 1st than as long as i stay on the gas it goes threw all 4 gears fine no slipping. the second problem is when im crusing about 35-40 im guessing and i stomp the gas theres a long pause like slipping between grears like 2-4 seconds i was wondering is it the tranny or Torque converter and what can i do to fix the problem, only got 49,000 on the truck but just put a 5"turbo back exhaust with no cat and my bullydog power pup with outlook monitor will be in this week so i dont think the dealer will help much