8.75 Sure Grip axle end play

8.75 Sure Grip axle end play - left side

rub2stix said
Huh? They pushed i the way- enough to tighten the axles onto the backing plates. Wouldn't that mean they're seated?

Not necessarily, the second set of splines isn't as wide as the outside set.

But pushing inward on right axle has no effect on left axle.

This^^^^ is why I don't think they are seated, or at least one of them isn't. If they were then they would both be in contact with the thrust buttons.