In 2014/15, they received refurbished seats, improved toilet facilities, anti-graffiti interior paint and NSW TrainLink vinyls.

[8] The design of the J sets is derived from the Transwa Prospector and AvonLink - the major difference being the driving cars are each single-engined instead of dual-engined, due to the lower top speed requirement for the Hunter line.

Reversible seating is covered with durable, vandal proof woollen moquette fabric in 3x2 formation, and have retractable footrests.

Instead of the entire body being of the same design, such as the Tangara, the driver's cab is built as a protective cage, made of fibreglass, which stretches to the end of the guard's door.

An auxiliary 150 kW (201 hp) Cummins 6ISBe-G1 diesel engine drives a Newage Stamford UCI274H alternator to supply power for the air conditioning and lighting.