Shortly after the nationalisation of the WMR line, the Napier Express was diverted in 1909 from the Wairarapa Line to run through the Manawatu Gorge and down the former WMR line to Wellington. Thereafter, the main passenger service to stop at Mauriceville was its replacement, the Wairarapa Mail. A new passenger-only service was provided from 1936 with the introduction of the Wairarapa-class railcars, which supplemented and later replaced the Wairarapa Mail in 1948. The Wairarapa railcars were in turn replaced after the opening of the Rimutaka Tunnel in 1955 by the twinset railcars, which provided the main passenger service for Mauriceville for the next 22 years. The 1959 railcar timetable shows two north-bound and two south-bound railcar services stopping at Mauriceville each day of the week, with a third service on Fridays. During the period in which railcar services were provided through Mauriceville, locomotive-hauled carriage trains were occasionally provided when demand exceeded the capacity of the railcars, but finally replaced railcar services altogether in 1977.