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Having this same issue with another 2009 Ram 5.7. Does HPTuners not have any other tables for this transmission?

What did you end up doing to get it to work?

Try lowering your Inertia Factor Profile table for your upshifts. You have also disabled the master switch for upshift TM. I would enable that as well.

Correct. I always go to the tire manufactures web page to get the exact diameter.

Sounds like it's losing fuel somewhere. I would be checking fuel pressure under load when it starts to act up.

Same issues here. Not sure whats going on with it.

That's awesome. I have a ton of respect for the Astro/Safari vans. Since I live in Baltimore, and there were built here is neat also. My old man had a 2000 Stro 4.3 and we put that thing through hell...

I would think a stock tune from a 09 Trailblazer SS or Silverado would get you close. Just search around the Tune Repository and see what you find.

Hey everyone, just wanted to take a minute to introduce myself here. I have been lurking on the forum for awhile now, and finally took the plunge with HPTuners pro.
I have a 09 G8 GT that I just...

Not sure if this is possible, but your vehicle PID says your are doing 158 mph, but on the tune, the limiter is set at 98 mph. Would that cause the injectors not to fire?

I just checked a stock tune for a 2005 Silverado 5.3 4l60e. From what I see, the Tow/Haul mode (performance mode in HPTuners) has slightly higher upshift speeds at part throttle, quicker shift times,...

I tried that as well, to no avail. Just finished installing Windows 7 back on my laptop along with a SSD drive.