Gotta question. I've noticed during the past week or so that when my truck's cold, it seems to slip just a smidge when I take off in 2nd from a standstill. It's really quick. After the truck's began to roll, it's right at the very end of the clutch pedal travel. I suppose that's when the clutch is going fully engaged. It feels, that at this point, it slips just a little. After I've driven down the road a few miles and she's warmed up a bit, it won't do it anymore and all is fine. I've only got 21k on the ticker and I can't possibly imagine the clutch is already going out. But, these stupid things are made in Mexico these days so who knows? I never race and the only time I ever clear the pipes is from third gear on up. So, has anyone else had this problem? Any advice? I'm getting sick of taking my truck to the dealership already. If it's not one thing, it's another. Thanks in advance.

 

If you clutch is actually going to slip it'll slip in the higher gears first. I'm thinking as your taking off and the load is coming on to the engine that the computer is applying more torque( turbo and fuel) causing more RPM ,without you applying more foot throttle, which gives one the impression the clutch is slipping.
Try letting your clutch out normally without feeding any throttle, you'll notice the computer will give some throttle to avoid engine stall.

 

Bluepp is right. Your clutch is just fine. You'll notice slipping at higher RPM's before you would at take off conditions.

 

One of the features of the electronic ISB engines is what Dodge/Cummins calls "ZTL"..(Zero Throttle Launch).

Keep your foot off the throttle pedal until the clutch is fully engaged and then add pedal to accelerate. The ECM will read RPM, load etc and add enuf fuel to prevent stall, even when starting in 3rd or 4th gear from a dead stop.

It's a nice featrue when pulling a big boat up a steep launch ramp....just put it in 1st and work with the brake and clutch pedals, no need to worry about giving it any throttle.

 

Negative. Like I said, 21k on the ticker and this just started a week ago and it only does it when cold. If it were my driving style, which it is not, it would be doing it all the time; cold, hot, every mile since new, rain, shine, etc. When I begin to accelerate from a stop, the rpm's rarely go over 1k. There's no way I should be feeling a slip at 1k or less.

 

I'm aware of all this as well. It'll do it regardless of whether or not I apply throttle. It did again this morning when I was pulling out of my driveway. The street I live on is very small; meaning as I'm pulling out I just milk the clutch till she's rolling with no throttle application. It still did it; just not as noticeable. I wonder if it could be the throw out bearing. Last night and this morning, I could have swore I actually heard the slip. Maybe I'm hearing things. But, you can definitely feel it.

 

G56 or NV5600? Maybe your self adjusting dual mass flywheel is out of adjustment. Do you have excessive idle vibration?

BTW, the ECM is programmed to cut off fuel below 500 rpm and stall the engine to prevent the dual mass flywheel from exploding. So DCX effectively screwed you on the Zero throttle launch. You can still do ZTL, but it will stall alot easier with the DMF/G56 vs. the Single plate/NV5600, which can go as low as 300rpm before stalling.

 

It's the G56. I wouldn't say I normally do a ZTL, but I give it enough throttle to where the idle rpm's don't really dip as I let out the clutch. I'll have to see if it still does it again in the morning as this is when it normally happens. The problem is that it only really does it once or twice. As soon as I've gone a couple blocks, it stops doing it.

 

Oh yeah, no excessive idle vibration.

 

after a weekend of smarty/quad stack and 50 psi, I can slip mine whenever I want. torque management-ha! of course I am not laughing about this.

 

You said it "feels" like it slips.

Is it chattering? Does the rpm rise without the vehicle accelerating to match?

If the rpm does go up without the vehicle accelerating in proportion, the clutch would be slipping.

If the rpm does not flare or go up when it happens and all your are feeling is a chatter/vibration, then it could be driveline alignment/U-joints.

 

I'll have to check for rpm rise tomorrow morning. I've been so focused on trying to feel/hear it that I didn't think to watch the tach. It did make a small noise this morning when it did. And this time it was with zero throttle.