904 Band Adjustment

If the torque converter isn't properly engaged and seated in the trans, or if there is a new converter installed and its nose doesn't fit the crank, the starter will struggle until the thrust bearing in the engine fails.

If the bands are way out of adjustment it is a sign of band wear.
Years ago an older tech stated.
One band adjuster was placed outside the case because it needs periodic adjustment.
The other band adjuster inside the case is best left alone after initial setup. Adjusting it to compensate for wear wouldn't help cure or prevent anything.
I don't know if this is true.