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Anybody have a good trans tune to try with correct shift points. Seems like mine wants to hit 4 5 or 6 to early and not kickdown to pass or just hang there until slow enough to to go to 3rd. Anybody with any experience with this setup that works good? I have the livewire ts for trans side. Just...

Well got alot of miles on the fummins and I now got code p1689 no communication between vp and ecm. Truck runs great not a smoking power monster but stock and really driveable. I've checked all wires and grounds. I'm wondering if this is electrical mosfet failure. Or should I look at alternator...

So my project started 4 months ago.... After alot of research and figuring out the cost involved I decided to look for a cummins and found this yesterday in a truck that guy couldnt get title for.