Last month I upgraded my 2006 4.4i with three Dinan mods. Got the cold air intake, new throttle body, Dinan exhausts and Stage 3 engine software.

Noticable increase in acceleration and growl. BUT when I pull out onto the highway from say a gas station, or a store on the side of the highway, I'm getting violent jerking and stopping...as if I can't get into gear. I've had this happen in both Steptronic and Sport mode, haven't yet tried the regular Drive mode.

Is this a known issue??

Funny thing, doesn't happen on straight-a-way acceleration, only on a turn-and-merge acceleration.

As far as I know Dinan doesn't have tranny software for the 2006 E53, maybe that would solve it?