Actually I just looked at the wiki link I posted and it mentions a tank upgrade program with the Israelis called T-55M3.
In Vietnamese translated to English by Google Translate:
Improvement and modernization of tanks and armored-
People's Army - Saturday, 05/12/2009, 17:51 (GMT 7)
Today, with the strong development of science and technology, technical equipment and weapons in general, up-armored vehicles (T-TG) in particular countries of the world is constantly researching, manufacturing create new and more modern equipment quickly into the military. Besides research, development, improvement trend, modernized to enhance technical capability, tactics of the vehicle type T-TG is also promoting the country. This is the appropriate choice in many countries the military has done, both to meet the operational requirements of modern warfare, both in line with economic conditions, the defense industry of each country.
Department of Technical Officer Corps (General Engineering) inspected the tank improvements. Image: LE HOA
The years, the improvement and modernization of the car T-TG is on the payroll is the most troops in the world and made regional focus. Programs and projects to improve and modernize the car T-TG concentration enhanced maneuverability, enhanced fire power, improved fire control systems, communications systems and improve self-protection. Through these programs, improvement projects, many types of car T-TG-generation first and second, capital obsolete technical features, tactics has makeover to become the weapon system powerful, high combat effectiveness.
To suit the type of modern war, meet the requirements of national defense, the improvement and modernization of T-TG car is essential. The Russian military has successfully improved many types of battle tanks with high power T-55 tanks into a T-55AM, PT-76 tanks into PT-76B/57mmAP ... U.S. Army M1A1 tanks to improve M1A2, M1A3 ... German Army M1 improved armored vehicles into armored Bradley M2 Bradley ... Based on equipment needs and potential capabilities, tend to improve and modernize the car T-TG in the future of the military is enhanced tactics and techniques for some types of cars T-TG as T54, T55, PT-76, BMP-1, M113, BTR-60BP, BRDM-2 ... become the standard vehicle car T-TG-generation main battle Tuesday, flexibility , high mobility and improve combat effectiveness.
Improvement towards increased mobility vehicles T-TG, scientists and military technical research has focused on the new engine has great capacity to improve its own capacity and maximum traction of the car . Such selection engine instead 5MC B46-engine B-55 on T-55 tanks, while capacity increased from 580 horsepower to 690 horsepower; B6-engined, 240 horsepower capacity of the tanks PT-76 with engine UTD-23 or AMZ-328 has a greater capacity. Research engine go-Eden replace gasoline engines in armored cars and armored tire chains. For the M113 vehicle, instead of gasoline engines with the go-Eden, or rather two petrol engines GAZ-49B on the BTR-60BP in a car engine go-Eden ... Research AMZ-236A transmission mount new resources (such as mechanical power transmission system planets, hydro mechanical automatic gearbox for the car T300PI M113) with a drive system and hydraulic control system operation improvements, to improve the characteristics and dynamics of smooth movement of vehicles. Enhance the vehicle's wading pool and T-TG on any terrain.
Improvements to enhance the fire power to fight the car T-TG is one of the priorities. Tanks were studied to improve fitting and use of artillery rounds advanced to destroy different objectives; mounted anti-tank missile system can destroy body and plates of all types of tanks modern. Specifically, T-54B, T-55 improved antitank missiles mounted Bastion (9K116) led by the laser, was launched through the 100mm guns. Grenade launchers mounted on armored caterpillar mounted 30mm grenade launcher on the AGC-17 M113 armored vehicles, mounted 57mm automatic cannon AY220M up PT-76 tanks to fire at targets on both land and air ... BTR armored car tires and BRDM-2-60BP improvements and installation of large range anti-tank missiles 152mm (Kornet-E), 30mm automatic grenade launcher or AG-30 23mm cannon barrel type 2 GS-23. Sync with the weapon system is the fire control system is also improved strongly, more car control system installed a new fire, like LANSADOT, EFCS-3, VOLNA with ballistic computer and telemetry is de-combined. Improved system stability, the viewfinder system, the glass thermal imaging night vision or amplify dim light generation to improve the flexibility and precision firepower to aim the target day, night and not to enemy detection.
The car T-TG also study Smoke gun mount fitted camouflage and explosive reactive armor to enhance self-protection, anti-detection and destroyed by means of reconnaissance and firepower of the enemy . Weapons systems on the vehicle of communication and T-TG step synchronization, research and installation of advanced types of communication station, modern, using high-speed integrated circuits, a wide frequency range, sensitivity high-frequency automatic adjustment, a long-distance communications and to ensure vehicle stability when contacted T-TG activity in any terrain.
The level and scale of improvements and modernization of the car T-TG militaries of different countries around the world. In our country, the improvement and modernization of the car T-TG to study the option consistent with the level of science and technology and defense industry in the country. Next time, our troops continue to implement programs and projects to improve and modernize T-TG in the direction of application of modern technology, product standards and level of car generation T-TG third, ensuring consistent with my typing, while mastering all aspects of technology transfer, to meet the technical requirements for ensuring long-term use.
Colonel, Master Tran Xuan Hai
It seems there is plenty of scope for cooperation and trade.