I'm experiencing very harsh shifts sometimes when using tow haul or have the exhaust brake on. This happens at low speeds such as traffic conditions or in city driving. Can't always duplicate it predictably but occurs usually when accelerating slowly from low speed and then letting up on the pedal due to traffic etc...then WHAM. It is not the trailer/hitch bucking as it does this sometimes with no trailer attached. It will do this when either the tow haul is on or the exhaust brake or both are on. Does so far more when towing, always at low speeds (20-40mph) and most often when letting up on the pedal.Has done this since new. Two dealers have no idea and the issue is difficult to reproduce at the dealership. Both dealers told me that the exhaust brake being on would not effect the transmission programming. All I can say is thats wrong. It is changing something in a very bad way! It is one heck of a strong WHAM that most definitely feels like the transmission slamming. I have to turn off the tow haul and exhaust brake unless on highway at high speeds.Anyone else with a Dodge 6.7L diesel 6spd Auto have similar issues?

Transmission programing. Mine does it too.

I get the same thing. Don't need to have the exhaust brake on. Just the tow/haul will do it.

From one crazy desert dweller to another, welcome to the forum.I don't have the trans in question- I have an F250 with a 5-speed Torqshift- but I've noticed that my truck shifts very angrily in tow/haul, both on upshifts and downshifts. Impossible to say for sure from behind a keyboard but what you're experiencing, as has been suggested, may be normal.

I like the engine and trans so much, I just adapted to it. I know when and where to use T/H and use the EB most of the time. Overall, pretty smooth. Good luck.

coolbreeze01 wrote:I like the engine and trans so much, I just adapted to it. I know when and where to use T/H and use the EB most of the time. Overall, pretty smooth. Good luck.I've gotten used to it to but sometimes forget to turn it off when exiting the highway. Plus, the exhaust brake does help slow in city driving but with the slamming I really can't use it.I assume Dodge has never addressed this issue with new firmware updates through a TSB? They did have one several years ago for harsh shifting but it had nothing to do with TH/EB and did not change anything noticeable.

'07 Dodge 6.7L harsh shifts using tow haul or exhaust brake?

tinner12002
Explorer
Aug 11, 2013
My 2012 Ram is like that also...just part of it. When trans is in tow/haul mode it seems to shift a little harder which is better for the tranny because heat kills when it comes to transmissions. So sliding into gear is out of the ques when towing. With the engine brake on it just compounds it because its downshifting but your not burning up your brakes trying to slow down.
Just reminds me of my racing days with a manual shift automatic...shifted so hard it would break tires lose.
DirtyOil
Explorer
Aug 10, 2013
a while back friend had same issue, he took it to dealer they performed an "update" to the hardware, made the T/H and brake work better together softened the shifts. may be worth a look?
cabanaman
Explorer
Aug 10, 2013
Dave H M wrote:
Cabanna, Lets say you are humming along in 5th gear at about 3500 rpm and all of a sudden you needed to stop like yesterday. how does all that work out in a panic situation? just wondering since I have the capability of doing the same thing.
I have never hit 3500rpms that would be about 90mph in 5th. That said in those occasions I hit the tow/haul button quick as I can.Its worked so far.
wilber1
Explorer
Aug 10, 2013
Humming along at 3500 in 5th gear?:h
Dave_H_M
Explorer II
Aug 10, 2013
Cabanna, Lets say you are humming along in 5th gear at about 3500 rpm and all of a sudden you needed to stop like yesterday. how does all that work out in a panic situation? just wondering since I have the capability of doing the same thing.
cabanaman
Explorer
Aug 10, 2013
Ezbagr wrote:
amxpress wrote:
I also have a 2007 Dodge 6.7 CTD. I tried towing with the transmission in TOW MODE and found the shifts to be too harsh, especially when downshifting during decelerating while towing.
I tow without using the TOW MODE and I always keep the exhaust brake on. If I get in a situation where I need a lower gear, I just manually downshift using the switch on the shifter stalk. Works great, no problems.

This is exactly how how run my truck. Exhaust brake on all the time-towing or not. Tow mode is never on-I use the toggle switch on the
gear shifter to upshift and downshift to my liking-works very nicely.
Ditto..,.
Perrysburg_Dodg
Explorer
Aug 10, 2013
Just had my 48RE rebuilt and had the shop add a shift kit to firm up the shifts in mine. Still looking for the year of your truck, if it's still under warranty take it back to the dealer and ask them to contact the factory help desk if they can't fix it.

None of the car companies want their customers upset and by asking them to make the call they might just try a little harder to fix it for you.

Good luck Don
maxwell11
Explorer
Aug 10, 2013
I have a 2005 and when I pull with T/h the transmission shifts: I would say more crisp or sharper, I was told the t/h mode increased the line pressure so the clutches do not slip.

mine works fine, I always pull the camper with t/h on

however, I sure wish I had an exhaust brake, now that would be cool.
so far, 72K miles, the truck is great,

2005 dodge 2500 diesel, quad cab, short bed.

great fuel mileage for a big heavy strong truck,
mileshuff
Explorer
Aug 09, 2013
sch911 wrote:
It is supposed to do that. Less wear on the clutches, runs cooler, and the trans can handle much higher loads when the clutches and converter are not slipping and remain cool.

Less wear on the clutches sure, but I don't think slamming metal to metal is good for the tranny! I'm not talking just slightly harsh. More of a very large jolt that bucks the truck hard. Everyone in it gets a beating. There is no way that hard of a jolt is normal!
Ezbagr
Explorer
Aug 09, 2013
amxpress wrote:
I also have a 2007 Dodge 6.7 CTD. I tried towing with the transmission in TOW MODE and found the shifts to be too harsh, especially when downshifting during decelerating while towing.
I tow without using the TOW MODE and I always keep the exhaust brake on. If I get in a situation where I need a lower gear, I just manually downshift using the switch on the shifter stalk. Works great, no problems.

This is exactly how how run my truck. Exhaust brake on all the time-towing or not. Tow mode is never on-I use the toggle switch on the
gear shifter to upshift and downshift to my liking-works very nicely.