This problem is driving me nuts. I just had all six injectors in my truck replaced under warranty. Truck had a white smoke problem and since the dealership was going under, they threw all six in. I then had the truck in for a center universal in the rear driveshaft. Truck is an 06 MC. The problem is, when the TC locks up, I get a nasty drivetrain vibration that shakes the truck, not unbearable, but comparable to a tire that needs balanced. Does this with OD in or out, only when the TC locks up. The other Ujoints looked good when the middle was changed. ANY IDEAS or anything I can check. Any chance at all it is a injector problem? Motor sounds good, but still puffs a little white smoke at start up

 

I have the same problem with my first gen when I lock up.. Im thinking it is a bad Tc.. Does yours get worse the harder you press the go fast pedal down?

 

Just took mine in for the same problem, it was the transducer govenor solenoid.

 

It doesn't do it when I accelerate, just a lock up udring light acceleration, it doesn't feel like it is in the transmission, it feels like the back of the truck is shaking.

 

Sounds like torque converter shutter to me. I had the same problem and fixed it with a Sun Coast TC and VB.

 

Problem has been traced down to a dead or cylinder missfire. When the TC locks up, the missfire is felt through the drivetrain, now the battle begins to try and get Dodge to cover it, they are very hard to deal with.