The Overlander was usually hauled by
DC or
EF locomotives with
NZR 56-foot carriages. Originally the service was operated with six
Northerner cars (originally single lavatory first class cars, later designated
South Island Main Trunk first class cars, refurbished for the original
Southerner Expresses of 1970), the
Bay Express servery/observation/rear-view car, and what was once both
The Connoisseur car and
TranzAlpine rear-view/observation car and the two
Northerner modular handbrake end-mounted 11 kW generator
FM -class power-luggage vans, painted in the dark blue InterCity logo with a 220 mm white stripe sandwiching a 100 mm red band, minus the parcels traffic. In December 1991 another modular van was refitted with a generator, and a
Wairarapa Connection car with 32 seats to a newer design arranged alcove-style and a servery to facilitate the introduction of a third trainset for maintenance requirements, the third set thus becoming a spare.
Extra Carriages The former Vice-Regal (
Governor-General) car turned Southerner full buffet car was refitted in 1993 and returned to the NIMT with 24 seats to a newer design arranged alcove style and a short buffet counter to replace the full-length counter and 20 bar stools. A new "no-frills" fare was introduced, using the remaining six
Northerner carriages, a
Southerner carriage and two Auckland excursion carriages between 1995 and 2002. With the cancellation of the
Bay Express in 2001, the three panorama carriages from that train were utilised as a fourth set for the NIMT.
Re-equipping From December 1991 to December 1994, nine ex second class passenger coaches built between 1937 and 1945 (one the former
TranzAlpine rear-view observation car, one a Southerner car, two from Auckland excursion, three from Auckland suburban and two from Wairarapa commuter services) were extensively refurbished similar to the successful "big window" panorama cars used on the
TranzAlpine,
Coastal Pacific and pressure-ventilated
Bay Express cars and made into three 3-car/1-van sets for "new"
Overlander/
Northerner services, each including a coach with a servery bar where hot food, snacks and beverages can be bought during the trip, a rear view observation car and a 49-seat day car. All nine cars were fully air-conditioned.
Vans Three modular vans, one from the Telecom train, one from the
Sesqui 1990 and one from the
Bay Express trains were refitted to newer designs, all incorporating new-style 90 kW generators for increased on-train requirements, as power-luggage vans. An Auckland suburban van, the other of two Bay Express vans and the second of two Northerner vans were similarly refitted to serve this train.
Double duty As the
Overlander and
Northerner shared rolling stock, substantially better carriage utilisation was achieved, compared to having two train sets sitting unused for over 12 hours a day. On Wednesday 16 August 2006, the first air-conditioned 42-seat rear-view Northerner/Overlander car and its air-conditioned 49-seat day car running mate, were taken to
Hutt Workshops and stored, their bogies went under the ex-British Rail cars for the
Wairarapa Connection. ==Former passenger stops==