  An improved description of single neutron stripping from $^{34,36,46}$Ar
beams at 33 MeV/nucleon by a hydrogen target is presented and the dependence on
the neutron-proton asymmetry of the spectroscopic factors is further
investigated. A finite range adiabatic model is used in the analysis and
compared to previous zero range and local energy approximations. Full
three-body Faddeev calculations are performed to estimate the error in the
reaction theory. In addition, errors from the optical potentials are also
evaluated. From our new spectroscopic factors extracted from transfer, it is
possible to corroborate the neutron-proton asymmetry dependence reported from
knockout measurements.
