I'll give you a tip.
If your impact gun doesnt seem to be working up to snuff (wont hit full RPM/power).
Spray a shot of WD40 into it, that'll loosen it back after it's been stored. Works every time (as long as nothing is broken).
We've taken tools that sat outside all winter and fixed them with some WD40... stuff works great. But make sure to oil it after it fixes your problem, because it's not the best lubricant.

89 4Runner
3" BL, M/T locks, 33"bfg mt, bilstein, Kayline, tubebumper, toyotafiberglass panels
TBI: Elocker,3.4 w/ORS,b+b,S2Sstg2cams,arias pistons,P+P intake,TRDs/c,URDpullies+7th,downey headers,MAPECU2,WEGO WB, SupraMAF,walboro255,stg4clutch, EPaOo2 sim