Freightliner Eaton Auto

Hey, I have a freightliner with an Eaton smart shift 2 pedal auto.

When taking off from 4th gear the truck sounds like its going to stall before then revving up normally. It's only for a few seconds, pretty much the same as if you try and take off in high range by mistake on a road ranger.

The driver also says it sometimes gets stuck shifting.

I am thinking the XY shifter? Is this the first thing you would try? And other ideas?

Thanks

 

Or would it be time to do the clutch? It's got 1,250,000 kms on it, and I doubt it has ever had the clutch done.

 

That's just what they do, all of my freightliners start in 4th in the auto