Hauss,
From what you described the backlash for the Axle is probably fine.
If you are seeing a 0.75" backlash at the OD of your 26" tire.
You can shrink that ratio of 13" Radius : 0.75" play by 6 are to come up with a .125" backlash at the (rough centerline is @ 2" radius on the CV joint balls).
https://www.calculator.net/ratio-cal...pe=2&x=91&y=18
Divide that by 2 (2 CV joints on the axle shaft) make its the slop at the Inboard or Outboard CV only 0.625" or 1/16". That gives each bearing only .03125 (1/32") on each side on the Ball for play.
You will probably come up with a lower backlash if you jack the wheels at the hub. Putting the axle at a normal ride (level) position.