Issue with Level 2 canned Gryphon

[Longshot270]

One thing that you can do is give the truck a little bit of gas to help it decide on what gear it wants to be in. What is happening is that at part throttle the PCM tells the truck to shift at specific mph marks. If you are creeping along when you reach that speed the transmission will still shift but because you are hanging around the upshift/downshift peak it gives you the results you noted. When I approach the shift points I will throttle up enough to get the truck over the point with a few mph to spare before I go back to my feather pedal. I then hold that slightly faster speed and not drop back down into the inter-shift condition range.

I should also add that my custom tow tune is not really intended for towing. I had tailored it based off of a tow tune for off road conditions before I sent off the info to have it made. It just happened to be more stop/go traffic friendly while getting better mileage so I have stuck with it. Now when I go on trips that involve going faster than 60ish with heavier pedal I switch to the performance because it drinks fuel pretty quick at highway speeds.

[CustomTruckGuy24]

I do that exact same thing, but the problem where I see it is from a crawl or stop and I can't get on the gas in these situations. It's usually when I am inching up in traffic waiting to take a turn and when I gas it to go, it does that which drives me nuts. Most of the time, it drives like a dream. Highway, mine reads 20-23 mpg at 60-65

[Longshot270]

Here is a tip. In the display, add the Comm Gear PID to what you watch. This is commanded gear. By your description it sounds like it is happening just before and at the 1-2 shift which is where this issue is most common.

[88Racing]

It almost sounds as if there's something amiss in the torque calculations of the canned tune in the lower rpm's.......

A custom tow tune might be able to take that variable out of the equation.....

I've seen this before a couple of times myself when I was running the canned tow tune.....

[CustomTruckGuy24]

Thanks longshot, I'll try that too. 88, I agree because other than that it's nearly perfect. The shifting is fantastic with the custom settings I entered. Nice firm shifts, just that periodic annoying quirk

[60DRB]

nice firm whats??????

[Longshot270]

Didn't notice that until just now.


How'd that one get by the language filter.....?