35 mph WOT power loss

Yea me neither, thats why I asked. When you do it you just tighten it very tight with a ratchet then back it off 1 turn?

No. Three times now. SHORT WRENCH. That way you cannot over tighten it. See, once you get the band TIGHT against the drum, it cannot go any farther. ........I always go 8 foot pounds out of the car. 6, 8 tight is tight. It's not critical. All that's critical is you get all the slack out of the band. If you want to, practice on a fastener out of the car first with the torque wrench and then without. It's REAL easy to feel what under 10 foot pounds is. Best way I can describe it is "pretty dang tight" with a SHORT wrench. It's just not as difficult nor as critical as you're makin it out to be.