Tow Tune Issue? You Decide. Videos
Turn off speed control. The speed control may shut off automatically when you are towing on long, steep grades." Page 250 under "Drive" "Turn off O/D
when driving conditions cause excessive shifting from O/D to other gears. Examples: city traffic, hilly terrain, heavy loads, trailor towing and when engine braking is required.
when driving conditions cause excessive shifting from O/D to other gears. Examples: city traffic, hilly terrain, heavy loads, trailor towing and when engine braking is required.
FWIW I have a tuner myself , while its not a Troyer it does the job and constent shifts are not a problem. After reading the posts up to now I think that it is owner/operator diffuculity.
Originally Posted by welfare wagon
After reading the posts up to now I think that it is owner/operator difficulty*.
Do you know what the value of N/V is equal to and how the PCM uses it.
Do you know about pressure slopes and pressure intercepts?
Do you know how long the transmission stays in cold shift mode and what even happens during cold shift mode?
Did you know there are timers for unlocks?
Do you know what the torque table does and how it effects the transmission?
Your Joe Dirt answer, would be: It just does.
And that's the difficulty we are having in this thread. No one understands that this is BAD, its a high frequency. If it was a low frequency problem and happening every 10 seconds or so back and forth and cannot maintain speed, then yes we would lock out OD.
But in the meantime while we wait for the next Joe Dirt to come along with his opinion...
Guy likes to see homos naked, that doesn't help me.
Originally Posted by Stealth
Cool. I can finally use this pic I saved a long time ago. 



Originally Posted by acadianabob
Just to be clear, I have never complained about the truck needing to shift or unlock the torque converter to meet demand. The problem is the rapid cycling. It seems like the downshift and upshift (or lock/unlock) parameters are right on top of each other. And the other point is that the truck handles this same towing situation flawlessly in stock mode. One other point to repeat, the truck did this once on the Tow Tune when I wasn't even towing; just a steep hill on a 2-lane highway running about 60 mph.
My truck had similar problems on a certain steep grade. This truck has no aftermarket tune. After doing some mods (intake, exhaust, ignition, pulleys) the problem was much more pronounced, to the point that I could no longer use the cruise control on that section of road, unless I wanted to feel like an idiot with the truck up and downshifting constantly.
On one trip my wife thought I was playing games keeping someone from passing, it was that bad.
My only logical explanation was that the cruise control is not designed to properly compensate for enough variables, and would try to accelerate too fast, forcing the downshift. With the extra power, acceleration was faster and thus was the upshift. By feeding some gas pedal earlier, I could go up the same grades with nothing other than converter unlock.
Thanks for the responses everyone. My intent here is not to stir up trouble. Rather, I have always felt that I have a potentially legitimate point of view on this issue that has not necessarily been adequately communicated or received a fair hearing. Since it can be hard to describe this kind of issue with text, I decided to post these videos as a video is worth 10,000 words. My purpose was to seek out knowledgable responses as to whether my view had any validity or was off-base. That's what these forums are all about. Some knowledgable people see it my way. Others do not. In the end, the vendor and I may just have to agree to disagree on this issue. That would be a shame because there are many aspects of the tunes that I appreciate and enjoy very much. Perhaps I should try to return the product and get a refund. Failing that, I guess I can try sell it.
Thank you to those of you who have put significant effort into this issue and discussion. You provided some valuable information and some thoughtful posts.
Thank you to those of you who have put significant effort into this issue and discussion. You provided some valuable information and some thoughtful posts.
Just a note to those confused by the fact that the video was during a tow. The same thing does happen when I'm not towing anything. So the argument about whether to tow in OD is moot.
Also, I got a cordial call from the vendor; reaching out. I was told that a number of other trucks are having this same issue. I am expecting some new programming at some point and hope that the issue can be resolved. This is a very positive development so I'm hopeful.
Also, I got a cordial call from the vendor; reaching out. I was told that a number of other trucks are having this same issue. I am expecting some new programming at some point and hope that the issue can be resolved. This is a very positive development so I'm hopeful.
Originally Posted by acadianabob
Just a note to those confused by the fact that the video was during a tow. The same thing does happen when I'm not towing anything. So the argument about whether to tow in OD is moot.
Also, I got a cordial call from the vendor; reaching out. I was told that a number of other trucks are having this same issue. I am expecting some new programming at some point and hope that the issue can be resolved. This is a very positive development so I'm hopeful.
Also, I got a cordial call from the vendor; reaching out. I was told that a number of other trucks are having this same issue. I am expecting some new programming at some point and hope that the issue can be resolved. This is a very positive development so I'm hopeful.
Originally Posted by acadianabob
Also, I got a cordial call from the vendor; reaching out. I was told that a number of other trucks are having this same issue. I am expecting some new programming at some point and hope that the issue can be resolved. This is a very positive development so I'm hopeful.
I know I'm stirring the pot, but... You mean the "vendor", in not so many words, said that something might be wrong with their tunes.
No way!!! How can someone with 25 years experience tuning these trucks create a tune that is anything but heaven on earth!!??!! I still can't believe it; the "vendor" may actually have to make a tranny adjustment, not just because you're requesting it, but because several other people are also having the same issue? I think I better go to church - Armegedon is comming!

His whining is about the fact that he cannot tow his load up a significant grade at 1800-2000 rpm (70 mph, a point at which the engine is making MAYBE 80-100 Hp at most) without his transmission downshifting out of Overdrive, getting back up to speed, and then upshifting right back into Overdrive once it attains the desired speed - just as is is supposed to do when you keep Overdrive enabled in that scenario.
No matter how many times I explain to him the facts of life, which are that at only 1800-2000 rpm towing a total load in excess of 5 tons between the truck and his towed weight, up a grade, a condition under which the engine is making *maybe* 80-100 Hp (and probably less) at light throttle like that, OF COURSE it has to unlock the TQ, and then if necessary, downshift to get the vehicle back up to speed - and then it will go back up into Overdrive - he refuses to accept it, and instead, attacks us - that is not just innocent ignorance, that is, I'm sorry to say, sheer stupidity and deliberate distortion.
No matter how many times I explain to him the facts of life, which are that at only 1800-2000 rpm towing a total load in excess of 5 tons between the truck and his towed weight, up a grade, a condition under which the engine is making *maybe* 80-100 Hp (and probably less) at light throttle like that, OF COURSE it has to unlock the TQ, and then if necessary, downshift to get the vehicle back up to speed - and then it will go back up into Overdrive - he refuses to accept it, and instead, attacks us - that is not just innocent ignorance, that is, I'm sorry to say, sheer stupidity and deliberate distortion.



