Slipping Chugging from stop

Offcamber · June 30, 2017

I just noticed the truck doing this.

2016 2500 4x4 6.0 Double cab with about 5K miles on the OD

When pulling away from a stop being slightly heavy on the throttle the truck seems to chug almost as if the tranny is slipping a little. Kind of a power on and off kind of thing. Haven't noticed the engine revving while its doing it. Seems likes its only for the first gear or two. I think it may be the traction control. Seems to not do it when I turn it off but I need to do more testing. Does on dry or wet pavement. First time I noticed it was accelerating up an on-ramp but now I notice it does it when leaving a stop on flat ground.

Has anyone else noticed this? Is it in fact the traction control? Dealer is an hour away so I really don't want to being it in if I don't have to.

thanks

I'll add one more thing....I just towed a 5K lb camper about 200 miles round trip through some hilly terrain and didn't notice it. So I am less likely to think its a slipping transmission.

TX.45 · June 30, 2017

Traction control is really aggressive on these trucks, thats probably what your noticing. I turn it off pretty often because I don't need it when driving the speed limit on freeway or in traffic. Stability control should be left on in normal driving though, it can save your hide in an emergency situation such as a quick lane change.

That's how I preferred to drive my C6 corvette when I had it as well. TC off, stability on. That's my opinion anyways.

4wdriver · June 30, 2017

Yes my truck does what you describe. Not sure what it is. My trans is sometimes confused a little also. I always turn off traction control and sometimes stability control however the stability control turns its self on when a certain speed is reached. 14k on mine I will ask the dealer if they know why it does this however I'm not counting on them to provide any help.

fjtort2 · July 1, 2017

It could be the terrible tune from the factory they put on the 6.0s... Mine does it off and on through its career. 38,000 miles now... No issues. Just annoying. Getting it tuned July 22nd.

cpap · July 1, 2017

I was just about to start a thread about the same. I notice mostly climbing a hill. The truck pulsates while under moderate load. Never felt anything like it in any other vehicle. I'll try flipping the traction control switch and see if that alleviates it.

I also notice the confused tranny as well. It even seems as though it will miss a shift every once in a while. The revs will go up then pop into gear between shifts.

Wonder if this is all related. Bad transmission?

4wdriver · July 1, 2017

I was just about to start a thread about the same. I notice mostly climbing a hill. The truck pulsates while under moderate load. Never felt anything like it in any other vehicle. I'll try flipping the traction control switch and see if that alleviates it.

I also notice the confused tranny as well. It even seems as though it will miss a shift every once in a while. The revs will go up then pop into gear between shifts.

Wonder if this is all related. Bad transmission?

Not sure about bad transmission but definitely annoying. I wouldn't be surprised if these issues are related to the increasing number of computer inputs that control everything now on the maybe to modernized trucks. Look at all the things we can monitor while we drive like the attitude of the truck in degrees a parameter like that is not a perk it's something the truck considers when deciding to shift on a hill or while towing and probably why letting off the gas to turn from the flat onto a hill completely confuses my transmission.

fjtort2 · July 2, 2017

I think it's normal operation of these 6.0s 6speeds.. Mine does the same.. Sometimes great power... other times its a slug!

gearheadesw · July 2, 2017

There's another thread on surging at low revs under slight load. Some feel its the torque converter lock up programming, as do I.

SMiller · July 2, 2017

There's another thread on surging at low revs under slight load. Some feel its the torque converter lock up programming, as do I.

That is true but that requires the truck to be in 3rd gear for the torque converter to be locked and the OP said on take off.

As always a tune will fix the problem.

As a test try using tow/haul and turn traction control off, bet you will find no more issues.

sdeeter19555 · July 2, 2017

That is true but that requires the truck to be in 3rd gear for the torque converter to be locked and the OP said on take off.

As always a tune will fix the problem.

As a test try using tow/haul and turn traction control off, bet you will find no more issues.

Torque converter on a 6l90e in my 2012 can and will lockup in all six gears...from a standing stop it will typically not lock first because it rolls through 1st so quick. Once rolling it will lock the converter for all other shifts. There are some exceptions, but that is the most typical scenario.

I have an Edge Insight that shows gear and converter lockup...

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