This last weekend while pulling my dual tandem trailer with a pick up loaded on it, the wrench light would set when it up-shifted after climbing a hill that required the tranny to down-shift.
The code was P0234 which is over-boost. No other code.
It had done it a few other times but not...
I had a Ford mechanic tell me that the stainless unison ring out of a duramax will resolve the turbo issues with the VGT PSD turbo. I searched around an couldn't find anything. Has anyone else heard of this.