


JA81 Front Differential
The JA81 front differential is developed for off-road and utility vehicle platforms that require dependable front-axle torque distribution and a practical path to OEM integration. Engineers should confirm the target ratio, input torque, rotation, mounting geometry, shaft interface, vehicle weight, tire size and traction requirements. Actual terrain, gradeability, thermal conditions and shock loading should guide validation planning. Zhejiang Jessica Transmission supports customer projects with technical communication, drawing review, samples, testing coordination and serial production planning. Contact us with your vehicle layout and requirements for application matching and quotation.
Key Parameters
· Ratio: 37 : 12
· Drive gear rotation: Clockwise (View from vehiclerear side)
· Input static torque capacity: 1700N·m
· Noise level: ≤80dB(A)
· Function Highlights: Electronic motor switching 2/4WD and Differential lock function, 4 planet gears
· Input interface: External splines
Input and Output Parameters
| Input | Output | ||
|---|---|---|---|
| External Splines | Side Shafts(Internal splines) | ||
| Module | 1.5875 | Module | 1.0 |
| Tooth No. | 14 | Tooth No. | 26 |
| Pressure Angle | 30° | Pressure Angle | 45° |
| Major Diameter | Ø24.8 | Major Diameter | Ø27.2 |
| Minor Diameter | Ø21.2 | Minor Diameter | Ø25.2 |
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Global Contact
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South Xiangmei Road
Mexico Facility
Calle Calidad #201, Vynmsa Apodaca Industrial Park, Apodaca, Nuevo León, México C.P. 66628
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