I am wondering how you guys are doing that have the flash applied to your trucks, has anyone had the skipped shift/pop out of gear problem after the flash?? what about MPG better or worse after flash?? also at about 42MPH my truck sometimes lugs and causes a chuttering sound, if anyone has had this problem does the flash fix it.

 

As far as I am concerned the flash changed nothing on my truck ,also since the flash I have lost about 1.5mpg. I was at the dealer today and they stated I was not the first person to say this.

 

A couple of things I'll throw out there.

I haven't had an automatic in anything before so as far as I knew it was working pretty good except for a couple of glitches which even I knew didn't seem right. Like once or twice it didn't shift out of 1st until almost 3000 rpm with very light throttle and a few times 2-3 seemed a bit off.

Anyway, I had the flash done done mainly because it is the latest and greatest and what the trucks are rolling out of the factory with now so I wanted it.

One issue that I had posted on which is not related to transmission was cruise control. Sometimes if I pressed the minus button, instead of slowing down by 1 mph and staying in cruise, it would drop out of cruise so I'd have to set it again. At first I thought this only happened if I was lugging along at really low rpm and dropping it a bit more would have been at the point where it would have downshifted. But I experimented a lot with that and it was, as far as I could tell, pretty random; rpm and gear didn't matter and it would do it whenever it felt like it.

It looks like the new flash has fixed this cruise issue.

As far as shifting, it is now going through the learning (calibration) phase and soon after the flash I had one pretty abrubt 1-2 shift which put me back in my seat and chirped the tire. That was really light on the gas peddle leaving a stop sign but it hasn't done it since. Everything else about the shifting feels as good or better than before. The hardish 4-5 which I thought was normal is much smoother now.

As far as mpg. I was about 300 miles into a full tank when I had it done and just prior the lie-o-meter was sitting at 21.1 mpg. Now I'm at 600 miles on that tank and the lie-o-meter is sitting on 21.2 mpg. The driving I had done in the first half is consistent with the driving I did in the second half; same routes, same amount of traffic, same speeds more-or-less.

So if I was looking at that I'd say there has been no effect on mpg.

Also, as I mentioned in the other thread, I am curious about the people seeing lower mpg if they are relying only on the lie-o-meter or hand calculating it. The reason I wonder that is if this flash has some improvements in the lie-o-meter and makes it closer to accurate (mine is always high), it might only look like less mpg.

 

I think what you describe as chuttering is what I would describe as clanging. Mine bangs or clangs at low rpm and under very light throttle. It is in the shop for the third or fourth time now and I am hoping they get it figured out. The flash did not fix it nor did adjusting a valve in the turbo. The flash definitely improved my shifting. MPG sucked before and still does.

 

I lost MPG also but it did not seem to come from the flash.
I had mine back for a few weeks before milage dropped
Went from 18.2 to 15.6
Regening alot now every 100-150 miles

Chugging is gone