Truck started bucking?

[STR8TORQUE]

I bought a 2008 XL with a 6 speed manual in it a few months ago. Since owning it I have replaced the fuel filters and oil. The other night while pulling a hill I shifted into third and it was a little doggy like I was lugging it but I was at about 1600rpms. It then started bucking violently like it was cutting out still similar to a low rpm stall. Also about a week ago I let it idle for about 5 minutes went to take off and it was rolling blue smoke and cutting out. I tried rapping it up and it just continued to miss. I shut it off and started it again and it was fine. I drove it a bit came home and checked my oil to see if there was diesel in it and it looked fine. The only mods are a DPF delete and a livewire I put on a couple weeks ago. Any ideas?

[K1LLsW1TchEd]

Guys have been changing out the map sensors lately. That could make your truck run crazy. There was a couple of threads recently with trucks smoking and running abnormally.

[STR8TORQUE]

I figured I would have a code or something. I will have to check it out. For now I have just been checking the oil every time I drive it to make sure I do not have diesel in it. The truck has 97k on it and I am sure not an easy mile ever.

[K1LLsW1TchEd]

Bucking or shuddering in these trucks is usually transmission related. Get the transmission serviced! The automatics usually start out with a shudder at 50MPH+ and then the clutches and torque convert fails.

[STR8TORQUE]

I have lost a couple clutches in both of my dodges and felt them slip but this is violent and never feels like it is slipping. There is very little peddle left though. Thanks I will check it out too.