Shandong Shengyue Technology Development Co.,Ltd is one of the most professional fast 6-speed manual transmission assembly 6ts55 manufacturers and suppliers in China. Please feel free to buy high quality genuine auto parts at competitive price from our factory.
Fast 6-Speed Manual Transmission Assembly 6TS55
Basic Specifications & Core Structural Parameters
| Category | Technical Item | Official Standard Data | Remarks / Notes |
|---|---|---|---|
| Basic Info | Product Series / Positioning | FAST "Small 6-Speed" Lightweight Series | Developed for urban logistics light trucks and specific medium-duty trucks. |
| Max. Input Torque | 550 N·m | The maximum peak torque of the paired engine must not exceed this limit. | |
| Max. Input Speed | 2600 - 3000 RPM | Matches mainstream mid-to-high speed light-duty commercial diesel engines. | |
| Physical Tech | Housing Material | High-Strength Aluminum Alloy | Excellent heat dissipation; significantly reduces dry weight (approx. 30% lighter than cast iron). |
| Shaft Layout / Design | Classic Twin Countershafts (or optimized single countershaft) | Variant-dependent. Twin countershaft layout offers power split and higher torque capacity. | |
| Clutch Matching Interface | Push-type or Pull-type Assembly | Commonly paired with Φ325 mm or Φ350 mm diaphragm spring clutches. |
6TS55 Full Gear Ratios Precise Matrix
| Gears | Nominal Gear Ratio | Transmission Characteristics | Actual Driving Scenario & Load Matching Description |
|---|---|---|---|
| 1st Gear | 6.22 | Low-speed massive ratio | Used for heavy loads, mud, steep underground ramps, and uphill launches; provides extreme tractive effort. |
| 2nd Gear | 3.67 | Low-speed transition | Standard launch and maneuvering gear for empty, standard load, or flat road conditions. |
| 3rd Gear | 2.21 | Mid-speed driving | Cruising under heavy load on urban roads or navigating busy city traffic/intersections. |
| 4th Gear | 1.45 | Mid-to-high speed climbing | State highway cruising, or downshifting to build momentum on moderate highway slopes. |
| 5th Gear | 1.00 | Direct Drive (Direct Gear) | Highest transmission efficiency. The input shaft and main shaft lock up to rotate synchronously. |
| 6th Gear | 0.78 | Overdrive (OD) | Express highway and smooth cruising. Drops engine RPM significantly to maximize fuel economy. |
| Reverse | 5.74 | Heavy-duty reverse | Ensures a fully loaded truck can reverse up steep inclines without burning the clutch friction disc. |
Control, Drivetrain & Electrical System Technology
| Category | Technical Item | Official Design Standards | Remarks / Notes |
|---|---|---|---|
| Shift Quality | Synchronizer Type | Sliding-Block Inertia Synchronizer | Fully synchronized across all gears (including Reverse/1st); completely eliminates double-clutching. |
| Shift Control Mechanism | Remote Cable Control | Filters engine vibration, provides crisp gear engagement with passenger car-like smoothness. | |
| Auxiliary Function | PTO (Power Take-Off) Interface | Side-mounted standard single PTO window | Convenient for sanitation/sprinkler trucks or truck-mounted cranes to install hydraulic pumps. |
| PTO Max. Allowed Torque | Approx. 180 - 220 N·m | Check the torque limit when mounting highly demanding auxiliary equipment. | |
| Electricals | Neutral Switch Interface | Thread-locked electrical contact | Connects to the vehicle ECU to execute safe ignition or start-stop controls. |
| Reverse Light Switch Interface | Mechanical stroke linked contact switch | Automatically triggers reverse tail lights and engages backing radar when shifting into Reverse. |
Maintenance, Fluids & Logistics Parameters
| Category | Technical Item | Official Calibration Data | Remarks / Notes |
|---|---|---|---|
| Lubricants | Gear Oil Capacity | Approx. 4.5 - 5.0 Liters (L) | For initial fills or after an overhaul wash, fill until oil is level with the side overflow hole. |
| Recommended Gear Oil Grade | 75W-90 (API GL-5 Grade) | Must use synthetic, low-sulfur gear oil meeting original FAST factory standards. | |
| First Oil Change & Intervals | Break-in period (New/Overhaul): Mandatory change at 2000–5000 km | Regularly replace every 40,000 to 500,000 km thereafter, depending on fleet duty cycles. | |
| Physical Weight | Transmission Net Weight | Approx. 85 kg (Dry/Without fluid) | Pay close attention to the load balancing of the all-aluminum casing when hauling or hoisting. |
| Logistics | Shipping Dimensions (Individual) | Approx. 65 cm × 50 cm × 55 cm | Dispatched and shipped in dedicated anti-topple rectangular wooden crates or reinforced heavy pallets. |
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