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Gearbox Parts Transmission Cover Fast Gearbox Top Cover 12JS160T-1703015 for Dongfeng Truck

The 12JS160T-1703015 Gear Shift Control Cover Assembly, manufactured by Fast Gear (FA Shi Te), is a core control component for heavy-duty manual transmissions. Commonly known as the transmission top cover or shift tower, this assembly serves as the central interface between the driver’s gear lever and the internal shifting mechanism of the gearbox.

Designed specifically for 12-speed dual countershaft transmission systems, it precisely transmits shift commands through a mechanical linkage system that includes longitudinal and lateral shafts, detent balls, springs, and interlock mechanisms. This ensures accurate gear engagement, clear shift feedback, and safe operation under high-torque conditions—critical in long-haul transport, construction, and mining applications.

Constructed from high-strength die-cast aluminum alloy, the 12JS160T-1703015 reduces overall transmission weight while maintaining structural rigidity, supporting modern commercial vehicle lightweighting trends in 2024–2026. The design has been refined to reduce internal friction, delivering smoother, lighter shifting effort compared to earlier models.
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  • 12JS160T-1703015

  • Dongfeng

Attribute Specification
Part Number 12JS160T-1703015
Product Name Transmission Gear Shift Top Cover / Shift Control Cover
Function Converts manual shift input into precise internal gear selection
Transmission Type Manual Heavy-Duty Truck Gearbox (Dual Countershaft Design)
Number of Speeds 12-Speed (H-pattern with splitter or range shift logic)
Primary Material High-Strength Die-Cast Aluminum Alloy (some heavy-duty versions use ductile cast iron)
Key Components Included - Shift forks (external)
- Longitudinal & lateral shift rods
- Detent balls & springs
- Mechanical interlock system
- Neutral switch port
Mounting Interface Bolted to top of transmission housing
OEM Manufacturer Fast Gear (FA Shi Te)
Compliance Standards GB/T 34891, QC/T 292–2019, ISO/TS 16949
变速箱顶盖-2


变速箱顶盖-1


Parameter Specification
Applicable Torque Range Supports input torque up to 1,800 N·m
Compatible Models 12JS160T, 12JS160TA, 12JSD160T, 12JSD180T, etc.
Weight (Approx.) 6.8 kg – 8.2 kg (aluminum version)
Operating Temperature Range -40°C to +130°C
Shift Force Reduction (vs older models) Up to 15% smoother action (optimized bushings and pivot points)
Interlock Function Prevents simultaneous engagement of two gears
Detent Position Accuracy Ensures stable gear retention; prevents "jumping out" of gear
Neutral Switch Port M12 × 1.5 threaded port for neutral position sensor
Sealing Method Gasket-sealed (use new gasket during installation)
Design Life ≥ 2 million shift cycles
Ventilation Feature Integrated breather/vent plug to prevent pressure build-up


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