- 30 January 1963 – Kuang junction closed down and all scheduled trains except 541/542 between Rawang and Batu Arang were withdrawn
- 9 units of 17-class Diesel Hydraulic shunter locomotives arrived from Kisha Seizo Kaisha (KSK) of Japan.
- 15 units of the 21.1 class Diesel Hydraulic locomotives were received from Kisha Seizo Kaisha (KSK) of Japan
- 6 units of 17-class Diesel Hydraulic shunter locomotives arrived from Kisha Seizo Kaisha (KSK) of Japan.
- 4 March 1966 the new Jurong branch in Singapore was officially open to traffic
- 6 April 1966 Sungai Golok station officiated and opened
- 6 June 1966 Batu Village new station opened
- 15 units of 28.1 class Diesel railcars were received
- BTA (Bogie Tank Ammonia) wagons put into service for CCM Malaysia –
- 1 April 1967 A new service comprising of railcars called the “Rengkas” was launched between Kuala Lumpur and Singapore
- 14 September 1967 Butterworth station and swing bridge open to traffic operation
- 15 September 1967 Butterworth – Padang Besar railcar service extended to Haadyai in Thailand
- Railcar service between Kuala Lumpur and Ipoh extended to Butterworth
- 23 April 1968 Tren rengkas 15dn from Kuala Lumpur to Singapore being worked by railcar head unit 28104 collided with mixed train 88up at Layang-Layang in Johor.
- 14 November 1968 Fire destroyed KTM’s computers in the general office as well as the audit section
- Prai -Penang vessels “Violet”, “Elizabeth” and “Pelangi” were sold off via tender
- 10 units of the 21.2 class Diesel Hydraulic locomotives were received from Kisha Seizo Kaisha (KSK) of Japan