GXL Issue

I have the same issue. Mine shudders when slowing down as well but just as its about to stop, at times feels like its going stall similar to a manual when forgetting to push in the clutch. I also have an intermittent knock from rear end when taking off slowly (approx 1500rpm each time), feels like the torque convert is still locked in then as load increases it unlocks and sends the knock down to the rear axle. Its going to toyota this friday for a check up.