Drive shaft bearing structure assemblies and methods for a snowblower can include a transmission and at least one drive shaft coupled to the transmission. The assembly can further include a transmission casing containing the transmission. The transmission casing can include at least one bearing structure. The bearing structure can be configured to receive a portion of the drive shaft during axial rotation of the shaft. In some aspects, there can be two drive shafts. In this aspect, the bearing structure can be configured to receive a first portion of each of the two drive shafts during axial rotation of the drive shafts. In another aspect, the bearing structure is bolted onto the transmission casing as a journal bearing.