tow/haul mode
 

I have an 06 CTD crewcab longbed automatic with 32k miles ( just purchased last week ) Unless i`m crazy it seems to me that when i`m in tow/haul mode this thing is still shifting into overdrive. It pulls strong through 1-2 & then hits third but then seems to almost immediately shift again OD ???? this thing is bone stock. is this normal, a factor safety thing, it seems to me that it should just keep on pulling. Come to think of it it does this while in "normal " mode as well. How do i fix this or is there an aftermarket device that will give me what i want..... Thanks for your help.

It should shift into OD while in tow/haul mode, that is normal. It shouldn't just jump past 3rd though.

thats a new one to me...but what would make it jump past third? is this just how they are from factory? would i need a programmer to change this or some other type of device? Thank Youfor your time.

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Hut.. we have the same exact truck...color and all. I bet she runs pretty good with the amount of mods. you have listed.:U:

my 06 when in tow haul is on the tc through 1st and 2nd when it shifts into 3rd the tc locks up... maybe that is what your feeling? Then it shifts into OD and lock up again

Yep it runs nice but more to come.
Mine usually locks at about 50 mph under medium throttle.

In Tow Haul: 1st, 2nd, TC lockup, OD. That way the clutches don't slip, casing the transmission to overheat or worse, burn up the transmission when pulling a heavy load.

Thats what I thought locks up in 3rd and OD

YES thats what mine does. If you want to not go to overdrive just push the button a second time and it locks out OD

right but then your not in tow haul anymore

ok .. i understand what you guys are saying, it just seems like it should pull a little longer in third before shifting into OD. it doesn`t even stay in 3 rd longer than a couple seconds. Thank You to all of you for your help.....

It will when your pulling or hauling something

Here is what mine does more specifically.
Empty flat road 1/4 throttle from stop in tow/haul mode.
0-20 1st gear
20-35 2nd gear
35-48 3rd gear locked TC
48 up 4th gear locked TC

You can feel the TC lock

In normal mode it shifts into 4th locked around 48-50

94 12 valve...thats the thing i am pulling something ... i`m pulling a 12` enclosed trailer approx. weight 2200 lbs. even when i put my foot in it a little it pulls great 1 & 2 gear, but when it hits third it almost immediately goes to OD. I did today turn the OD off & try it and it pulled hard the whole time...i guess its just a learning curve for me....i`ve always had gas trucks. Thank You for your help

If it is actually jumping from 2nd to 4th there is a problem. If it were me I would have the dealer check it out/fix it under warranty. From what I have seen there are quite a few TSBs on it.
FWIW - When I tow my 14' enclosed trailer with aprox. the same weight it pulls and shifts almost like it's empty. But, when I tow heavier weight(13K lb 5th wheel) it takes awhile to get from 3rd to overdrive. It gets to cruising speeds before shift.

what are TSBs?

Technical Service Bulletins

hook to a trailer, push tow/haul and then see how it shifts. the tranny will shift right into 4th lockup (overdrive) if it sees there is no load or the need to stay into 3rd gear lockup. if you hammer on it with tow/haul mode engaged and keep your foot to the floor, it will no do this. push the button 1 more time to get OD off, push the button 1 more time and it goes back to normal mode.

Is it possible that the trailer load is to "light" for it to feel the need to stay in 3rd to continue pulling. I have laid into it a little bit with the trailer attatched and it just seems to jump to OD. without the trailer and in "normal" mode it seems fine. I dont know this is a whole new world for me. Thanks

we will get ya on track SLVR. get with andy and we can get you the operation and description of that system. it will be clear as mud when we get done with ya! :tttt: lol

Thank You so much for your help.....i`m just a littled peared out that there may be something wrong with my truck & if there is i would like the dealer to take care of it while its on there dime. Thank You again ..take care

The newer programs have a tendency to get to OD as quick as possible for economy. Frankly, 2200 lbs is not much of a load and if you are not driving into the throttle very far they tend not to hold direct for long.

Try it where you can run at 3/4 throttle and let it shift out and see if that will work. If it still wants to go into OD relatively fast you may have a problem with the gov solenoid and/or transducer.

tow/haul mode UPDATE
 

:U::U:First i want to thank everyone who gave me there opinions/input on this topic.

The results: Basically what it comes down too is i`m a newbie in the Diesel truck world and the short shifting i thought i was having was nothing at all. A local diesel Dr. explained it to me that CTD`s are low RPM high torque motors & unless it is required its going to shift into OD and still be able to pull the load comfortably. He also told me that my particular tranny type does alot of gear searching. Its just the first of many things i have to learn about the Diesel world. Thank You Again guys

IT ALL DEPENDS ON HOW HARD UR FOOT IS IN IT. YOUR TRANS SEEMS TO BE SHIFTING NORMAL. WHAT YOU ARE PROBLEY FEELING THE THE TC LOCKUP..

OPERATION OF TOW/HAUL
At key-on, overdrive operation is allowed. Pressing the switch once enables Tow/Haul mode and the Tow/Haul lamp will be illuminated. In Tow/Haul mode, 5th gear is disabled and 3-4 upshifts are delayed. Shifts into 4th gear are still allowed under steady cruise conditions. Closed throttle downshifts (for improved engine braking) may occur during steady braking maneuvers. Pressing the switch a second time enables OD Off mode, where all 4th and 5th gear operation is inhibited. Pressing the switch a third time restores normal operation. Normal operation is always the default at start-up; the switch must be pressed after each key start if Tow/Haul mode is desired.

Thanks for your responce cummins tech....i did however have it to a local performane garage that deals with the CTD alot and there techs. said the same thing its working just fine...nothing to worry about.

On another note am i able to get the ecm flashed to allow me to control my high idle with the cruise buttons? is this possible on an automatic?

Thanks for your time.

Technical Service Bullitens set forth by the Dodge

how many rpms is it at when it does this?if theyre to high it probably does this as a safety procaution:U::U:

if i had to guess it would be around 3500...i would have to take a closer look tomorrow.

its not a flash. you have to go to the dealership and they can turn it on for you. i do know if you are looking for a programer the smarty does have the high idle in it..