use to stick a " big " screwdriver in the teeth on the convertor, that would bind up against the trans housing. never had a problem w/ doing it that way.
Would it stay in place on it's own? I've had a buddy do that while I loosen or tightened a balancer but I've never tried jamming it in there and doing it by myself
BTW: the main reason I posted "X1000" to AJ's response is because an impact should never ever be used to pull a balancer on.