wasnt sure how to post questions so i thought id try here i just bought a 2001 dodge ram 1500 5.2 with 130,000 miles the truck is in really good condition except for two things. 1 whenever i floor it from a stand still i have no power it has a new exaughst on it so i know its not the cat and all around i have a lack of "get up and go" and 2 my tranny shifts quick from second to third then when i gun it it shifts down 2 gears then goes up one real quick and when im going 45-50 my truck has a differential like pop like its trying to lock up on me but it doesnt do it all the time every mechanic i take it to says im crazy and nothing is wrong with it but i know my truck please help it is my first dodge and its a really good truck and i hate to say but its making me not like driving it and giving a bad rep for dodges to me

 

Welcome to the site. I will move this thread to the second generation Ram section,
FF

 

Transducers in these transmissions for governor pressure don't like wide open throttle. Does it shift nicely otherwise?

For "no power".... Check the plenum (try a search, tons of information on this here).

 

Like HeyYou said above and when is the last time there was a tune up done on the truck. if it were me i would invest in some plugs wires cap and rotor.

 

check all they said, but in the future you might want check out your fuel pump make sure your getting right PSI. Not enough fuel to the engine can cause low power.

 

the tranny does shift ok it hits hard every once and a while and when it shifts to second it does good at first then it feels like it slips but its still in gear and drives fine the tune up is the next thing on my list to do a couple of new developments though turns out my cat is bad i hit a bump and i started sputtering and the check engine light started flashing and it was weird today i had the throttle at a steady position and i was accelerating to 65 from 45 and at about 55 it all of a sudden kicked in with extra power and hauled *** then went right back im thinking fuel filter?

 

Does it hesitate really bad until about 3,000rpm?

 

Well, mine sure does. It's like the tach hits 3k and I get a shot of nitrous.

 

......... jclark was mising some of these. All kiding aside, could it be the torque converter?
FF

 

It most likely a bad plenum and bad cat. Take off your air hat, open the butterfly valves and use a bright flashlight to look down into your intake. If you see oil you've got a bad plenum gasket, or a bad PCV Valve.