To reduce the number of "X" ( bogie exchange ) wagons, the wagons coded JCX_ were recoded to JCF during late 1977. Fifteen new JCX were under construction at the time at Ballarat. These wagons were transferred to Newport Workshops where they were recoded to JCF for service.
The JCF numbers were 101 - 130, 101 - 115 ex JCX and 116 - 130 the vehicles built at Ballarat.
In 1978, traffic requirements on the standard gauge required the JCX wagons back in service. Vehicles JCF 101 - 115 were recoded back to JCX.
In the 1979 recoding, the remaining wagons were recoded to VHCY.
The VHCY numbers were 116 to 130.
In 1980 all VHCY wagons were reclassed to VHCX.