Between 1972 and 1976, two hundred and fifty large louvre vans were built. The vans were classed as VSX and were numbered 801 - 1050.
Features of the vans were Miner handbrake, corrugated sliding doors with central body opening, red painted body and silver roof.
To provide vans for Freight Centre traffic in 1978, several vans were reclassed to VSF_.
In 1978, VSX 809 was destroyed at Ubonia, WA and VSX 930 was destroyed at Port Augusta, South Australia.
In 1979, VSX 834 was destroyed at Zanthus, Western Australia.
With the 1979 recoding the VSX class was recoded to VLEX.
At the same time traffic commitments required conversions to other classes. There were conversion to VLEY and VLNX from the VSX group.