Well the W59 is the trans offered behind the 3RZ for certain years. Took the place of the W56 that was behind the 22RE. The bellhousing that folks said would fit was behind the 2005(?) and later 2.7L engines, I believe it is called a 2TR? Drive by wire engine that replaced the 3RZ... Anyway, that trans(whatever model it is) has a 7.5" input shaft, so it can't work with an earlier R150(6.5" input shaft and years '88-95?). It would have to be a later model R150 ('96 & later??) So other than the Marlin bellhousing or the R151 turbo trans bellhousing there isn't anything else available.
Is this correct?