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You can program a lean cruise condition by modifying the O2 sensor switching voltage to target a higher AFR. Other than that, you can get some with VE tuning, MAF tuning, and lowering shift points...

Try reducing the allowed in-gear torque or the allowed torque vs RPM.

As far as I know openflash does not have the capability to bypass or fix the RSA encryption that is blocking transmission flashes on that transmission, nor does it support tuning the encrypted...

Update: The band somehow was not anchored, so 2nd didnt apply ever (of course) and 4th applied only under light throttle and quickly burned up those clutches. After my rebuild the shifting is all...

if you have the VSS on the output of the transfer case, driving in low will be way messed up. The computer will not want to shift even though the engine will be spinning however many times more the...

will do and report back.

On a side note, I do not know how long this transmission was sitting before I installed it. Could easily have been months and it was dry for the most part. Is sticking...

You mean use the scanner shift functions to shift manually? In the image below, I would hit the 1st gear button, then drive it up to 3k rpm and hit the 1-2 shift button?
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updated first post with a config that shows the gear indication, output RPM, shift time, etc.

Yeah I dont have or plan to use a performance switch and I have the converter set to lock up in 2nd since the vehicle is by no means a performance vehicle and has much deeper gears than the Silverado...

5.3l Yukon engine with 4l65 from a silverado swapped to a jeep. This is perplexing me. Based on my logs it looks like the transmission is being commanded to shift but it is not shifting immediately...

Ah, somehow I missed the file you posted. If you back out the gear ratios from the engine RPM and indicated speed, there is an additional 2.7:1 gear in there, so it sure sounds like its in low gear

I realize thats what he has shown on the tune, but it doesnt add up compared to the pulses/mile shown. Using a tire exactly 36" at 8 pulses per rev the calc should be 18,375.92 pulses per...

what are you using for a VSS? How many teeth on the gear? Based on your pulses/mile input the VSS would have 2.7 teeth.

Looking at my logs, the shifts match almost perfectly with the hot mode map. This doesn't make sense unless the stock sensor is busted or the computer gets somehow locked into hot mode until reset. I...

Transmission menu isn't giving me an option for 4l65e. Maybe I need to go grab a tune from the repository for a silverado ss which is what the transmission came from, and then modify it to work with...

Newly installed 5.3 in a jeep. 4l65e transmission using slightly modified stock 2005 Yukon tables. Under 25% throttle the transmission does not initiate the shift until around 25 mph. The shift...