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Fast F12JZ** AMT Transmission

FAST F12JZ** is Twin Countershaft AMT transmission has 12 forward gears, the gear ratio steps are arranged reasonably, and has very outstanding fuel economy performance. With double intermediate shaft structure design and integrated with a synchronizer, the maximum input speed is 2600 RPM. The length of the F12JZ** transmission is 927.87 mm. The F12JZ** gearbox has 12 different gears, and the reduction ratio of each gear is different. The 1st gear reduction ratio is 15.699, 2nd gear reduction ratio is 12.260, 3rd gear reduction ratio is 9.420, 4th gear reduction ratio is 7.356, 5th gear reduction ratio is 5.790, 6th gear reduction ratio is 4.521, 7th gear reduction ratio is 3.472, The 8th gear reduction ratio is 2.712, the 9th gear reduction ratio is 2.083, the 10th gear reduction ratio is 1.627, 11th gear reduction ratio is 1.280, 12th gear reduction ratio is 1.000, and the reverse gear 1 ratio is 14.433, and the reverse gear 2 ratio is 11.279.

FAST 12-speed AMT series transmission have different models, with code J in the model name means mechanical transmission, with code Z in the model name indicates that the transmission is an automatic transmission, with code D in the model name means standard transmission, with code S in the model name means transmission with Double Intermediate Shaft design.

F·SHIFT is an AMT automatic transmission system designed by Fast Company using the OptiDrive modular system of WABCO Company. It not only adopts the technical advantages of Fast double countershaft transmission, but also adopts the advanced and mature control system and actuator of WABCO.

1. It is synchronized with CMI’ advanced design and sophisticated manufacturing, adapts to harsh working conditions, and has high-intensity and heavy-duty work capabilities.
2. The Holset wastegate valve makes the low speed performance more perfect and the power performance better.
3. The cylinder block and cylinder head adopt integrated design to prevent the occurrence of engine water and oil leakage. The parts are 40% less than other similar engines, and the failure rate is greatly reduced.
4. Using forged steel camshaft and crankshaft, high-strength cylinder design, many parts are cast on the cylinder, with high rigidity, high pressure resistance, good reliability and longer service life.
5. The cylinder liner adopts a platform mesh honing design, which effectively prevents oil leakage with a perfect geometric structure, and adopts advanced technology such as new piston ring components and gasket crimping molding to reduce oil loss.

Technical Specifications

Basic Introduction of Shaanxi Fast F12JZ** AMT

Transmission Model: F12JZ**
Transmission Application: Automated Manual Transmission
Input Torque: 1800~2800 N.m
Maximum Speed: 2600 RPM
Installation length:

927.87 mm

Weight Iron/Al Alloy: 290Kg
Fuel Quantity: 15 L
Speed Ratio: 15.699
Lead Time: 15-30 Working Days
Payment Terms: T/T ,L/C
The picture of Performance Curve-DCEC Cummins Industrial Engine

Transmission Model

Max. Input Torque

Max. Input Power

Rated Speed

6DZS180 1800 N.m 2600 RPM 266 Kg
10JZSD200 2000 N.m 2600 RPM 280 Kg
F12JZ** 1800~2800 N.m 2600 RPM 290 Kg
F12JZ**A 2000~3200 N.m 2600 RPM 290 Kg
F16JZ** 1800~2800 N.m 2600 RPM 310 Kg
F16JZ**A 2000~2400 N.m 2600 RPM 310 Kg
——END——

Shaanxi Fast F12JZ** AMT-Automatic Manual Transmission Data Sheet

Model F12JZ** Input TorqueN.m 1800-2800
Maximum SpeedRPM 2600 Lengthmm 927.87
Weight Iron/Al Alloy (Kg) 290 Oil (L) Tol. ±4% 15

Speed Ratio of Shaanxi Fast F12JZ** AMT-Automatic Manual Transmission

1st Gear 15.699 2nd Gear 12.26 3rd Gear 9.42
4th Gear 7.356 5th Gear 5.79 6th Gear 4.521
7th Gear 3.472 8th Gear 2.712 9th Gear 2.083
10th Gear 1.627 11th Gear 1.28 12th Gear 1
R1 14.443 R2 11.279
——END——

Scopes of Supply of Shaanxi Fast F12JZ** Automated Manual Transmission

1. Electrical Shifting Systerm 2. TCU clutch control unit 3. Speed sensor
4. Distance Sensor 5. Temperature Sensor 6. Preesure Sensor
7. Main Box 8. Auxiliary Box 9. Gearbox Housing
10. Countershaft Braker 11. Braker Solenoid Valve
——END——

Optional Accessories of Shaanxi Fast F12JZ** Automated Manual Transmission

1. Shift Handle 2. Clutch Assembly 3. Power Takeoff
4. Hydraulic Retarder Comes With Lubricating Oil Pump
——END——

Modifiable Components of Shaanxi Fast F12JZ** Automated Manual Transmission

1. Helical Teeth 2. Straight Teeth 3. Lubricating Oil Pump
4. Smoothing 5. Gear Shot Blasting
——END——

Note: All Above Data are Just for Referenece, All Data Might Change Without Notices or Update, Please Contact Our Sales Team to Confirm All Details Via WhatsApp or Email.

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Sales Team


Automotive Engine - Mr. Wells Luo

Sales Director - Mr. Jasper Lee      

Service Team


Technical Service - Mr. Vin Hu

Customer Service - Mrs. Wendy Fu

Contact EMAC Now!

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