Which manufacturer and gearbox is ZF16S1650, as well as RT11509 and DC12J180T? ZF16S1650 is a joint venture brand of German ZF Sachs AG and China National Heavy Duty Truck Group. The 16S1650 gearbox belongs to the Ecosplit ClassicLine in the ZF heavy-duty gearbox series. , its structure is a single countershaft planetary gear auxiliary box; it adopts a full synchronizer structure 8*2 method. Adopt full synchronizer structure. 16 forward gears with a speed ratio range of 0.851-15.387. It adopts a single intermediate shaft main box structure and a high-strength cast iron casing. The main box gear adopts full helical gear technology. The disadvantage is that the single intermediate shaft main box. When the load is large, the intermediate shaft in the main box will , The spindle is prone to deformation, and because the helical gear structure requires a relatively high matching clearance, more professional tools are required for maintenance. Because most of the gears on the main shaft use needle roller bearings as the carrier for their rotation, it is prohibited to slide out of gear at high speed (to avoid burning the box). Because it is a joint venture brand, its after-sales and parts procurement costs are relatively high and there are few maintenance outlets. RT11509 is a Fuller series transmission imported by China National Heavy Duty Truck Corporation from Eaton (ntorr) Company of the United States. The transmission consists of a front main gear with 5 forward gears (including 1 low speed gear) and 1 reverse gear. box and a rear-mounted secondary gear with 2 gears. DC12J180T is produced by Shaanxi Fast Group. The transmission is a 16-speed fully synchronized transmission, which adopts a single countershaft main drive and a planetary multi-speed transmission combination auxiliary box structure and a cast aluminum shell. It is the "lightest king" among similar products. Looking at the technical routes of domestic heavy truck transmission products, there are no more than three types, namely the American Eaton technology represented by Fast transmission, the German ZF technology represented by the Qi gear transmission, and the Japanese Nissan Diesel technology represented by the large gear transmission. . Fast introduced Eaton technology from the United States in 1984. This technology transmission adopts a double countershaft structure and has a strong ability to withstand large torques. It is suitable for short wheelbase, high-power heavy trucks and special vehicles; in 1985, Qiji was introduced to ZF from Germany. Technology, this technology transmission adopts a single countershaft with synchronizer structure, which is flexible and light in shifting, and is suitable for heavy trucks operating in areas with complex road conditions; in 1986, Daji introduced Nissan Diesel TMH402 transmission manufacturing technology, which adopted a clutch separation mechanism and The barrel-shaped structure makes gear shifting easy and easy to lay out on various vehicle chassis. It is suitable for medium- and medium-heavy trucks.