Has anyone had any experience replacing the seals in the rear axle tube hub end. The FSM says to use a SST to remove the axle from the backing plate, is there another way without buying this SST? Is there anything else I should replace while I'm in here?

Thanks

89 yota pickup
22RE 261C cam
Tanny / engine rebuilt after 256K
Head machined to RV street spec(EB's)