All across the board.
It almost seems like rounded teeth on a drive gear to be honest. Slipping under load, but with a little help it finds purchase until 3/4 through the out cycle and then sweeps back fine on the return.
If my estimations are correct, to get at the drive/linkage I should only need to take off the arms, the valence trim/seals and the small inspection cover against the driver's side fender. Does that sound about right?
I found myself another fairly significant issue too - one of the pain the you-know-what heater hoses from the back of the engine to the control valve has sprung a small leak. I see lots of swearing and bloody knuckles in my immediate future.