Backing A 2019 T680 Kw

Can someone please tell how to prevent the truck from lunging and jerking when backing

Tell it politely but firmly, "no."

Is this happening in creep mode or with you on the pedal? All docks or just ones with a graded slope?

I don't hit alot of docks but backing in at truck stops and places I sometimes have to fight the spread axle tire binding effect my trailers have. Feels like a bucking horse a bit if the angle is steep and the asphalt is particularly grippy.

I don't know how bad it is for you but I try to ride it out or stop if it gets heavy. How fast is the truck moving when it bounces?

Ever get that "foot bouncing on the pedal dance" with the truck ?

I never had a KW with the "Creep Mode", but the newer models may.

It will take trial and error to learn the nuances. The reason for the lunging, or the transmission getting wound up, is the centrifugal clutch. It takes in more fluid, then the rate of RPMs needs to be greater to spin the clutch itself. Once this balance occurs, the truck will almost have a mind of it's own.

I recommend very subtle pressure on the throttle until you figure out what your truck likes. I also recommend using the brake pedal in a similar fashion that you would use the clutch pedal when backing into a space or dock.

It took me about three months to achieve a really smooth backing procedure with the three KWs I drove.

Can someone please tell how to prevent the truck from lunging and jerking when backing

If you can , turn off Hill Holding and Traction Control. Put your right foot up against the floorboard where the drive shaft comes through and feather your throttle as you press down on the accelerator.

I agree with augie69. I was having the same problem with my freighliner at first. Your foot will get used to what it needs after a few weeks. But until then something that one of the moderators posted helped me. Lock in your diff. Just try it. It helped me a great deal. Just remember to unlock it when you are done. It won’t hurt anything.

I think I got that nugget if advise from something G-TOWN replied to awhile back on a similar topic

You should have a roll control switch, turn that on when backing. Then it takes practice on the pedal. And sometimes it will still lurch.