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High-quality, brand new truck parts F99902 DONGFENG TRUCK Rear Output Flange

The F99902 Rear Output Flange Assembly is a critical driveline component designed for heavy-duty commercial vehicles, primarily used to connect the transmission output shaft to the drive shaft (propeller shaft). As a core part of the power transmission system, it ensures reliable torque transfer from the gearbox to the rear axle under high-load and high-speed operating conditions.

Manufactured to meet FAST Gear (Fa Shi Te) original equipment (OE) standards, this flange is widely installed on 9-, 10-, 12-, and 16-speed manual and AMT transmissions such as the 9JS, 12JSD, and 16JSD series. It features precision-machined splines and face serrations that ensure secure coupling with the driveshaft yoke, minimizing slippage and wear.

Constructed from high-strength alloy steel and subjected to advanced heat treatment processes, the F99902 delivers exceptional torsional strength, wear resistance, and fatigue durability. Each unit undergoes strict dynamic balancing testing to prevent vibration at high rotational speeds (up to 3000 rpm), making it ideal for modern high-horsepower trucks engaged in long-haul transport and heavy freight applications.

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Model:
F99902
Brand:
Dongfeng

Product Description

Attribute	Specification
Part Number	F99902
Product Name	Transmission Rear Output Flange Assembly
Function	Transmits torque from transmission output shaft to propeller shaft
Application Position	Mounted at the rear end of the transmission casing
Vehicle Type	Heavy-Duty Trucks, Long-Haul Freighters, Construction & Mining Vehicles
Compatible Transmission	FAST Gear: 9JS, 12JSD, 16JSD series (Manual & AMT)
Primary Material	Forged Alloy Steel (40Cr or 42CrMo)
Heat Treatment	Overall quenching & tempering + high-frequency surface hardening on face teeth
Surface Finish	Machined with anti-rust coating
Balance Requirement	Dynamically balanced (Grade G6.3 per ISO 1940)
Mounting Method	Bolted via end yoke with high-strength bolts (typically M16 or M18)
Sealing Interface	Works with rear transmission oil seal (recommended replacement during service)
OEM Standard	FAST Gear Original Equipment Specification
Certifications	ISO 9001, IATF 16949, GB/T 6403 (Machining Standards)

Parameter	Specification
Spline Type (Inner Bore)	10-tooth or 16-tooth (matches output shaft spline)
Outer Diameter (OD)	Matches 155mm or 180mm series driveshafts
Center Bore Diameter	~55 mm – 60 mm (for output shaft fit)
Face Serration Type	Cross-serrated (end-teeth) or flat-hole pattern (model-dependent)
Number of Mounting Holes	6 × Φ17 mm (standard); arranged on PCD 180–190 mm
Material Tensile Strength	≥ 900 MPa (after heat treatment)
Hardness (Surface)	HRC 45–55 (face and spline areas)
Dynamic Balance Grade	G6.3 (ISO 1940) – tested up to 3000 rpm
Maximum Torque Capacity	Supports > 1600 N·m (depending on transmission model)
Weight (Approx.)	8.0 kg – 10.5 kg
Operating Temperature Range	-40°C to +150°C
Fatigue Life	≥ 1 million cycles under rated load