Manual transmission fluids

Typical manual transmission fluids additive packs contain 6-10 components, many being the same components used for modern automatic transmission fluids. The key differences are the treat levels of components, e.g. dispersants and friction modifiers, and the type and level of antiwear components. A typical manual gearbox standard operating temperature of 90 C is not as thermally challenging as that of a modern automatic transmission in excess of 120°C. This is usually reflected in the superior oxidative stability exhibited by modern automatic transmission fluids compared with manual transmission fluids. Table 10.3 shows the generic composition of a manual transmission fluid, with the component(s) that differ from an automatic transmission fluid highlighted. 

Table 10.3 Generic composition of a manual transmission fluid...

Hot oil oxidation test (manual transmission and rear axle oils). Temperature of the test was 200°C. After 16 h, the viscosity of the PAO fluid increased by only 21% but the mineral oil product became too viscous to measure. 

Automatic transmission fluids suitable for automotive hydraulic, power steering and some manual transmission applications. 

The manual-operated valve (refer to Figure 3.9) is conneeted to the car gear selection mechanism. It controls the transmission fluid flow to the forward or reverse loop. Except in manual Ist-Gear position, the function of manual-operated valve is same in all forward gear. In manual Ist-Gear, the transmission fluid will enter into the shift valve 1 —2 to make the rear brake belt... 

During 1-2 shift period, drive the transmission fluid from manual-operated valve to the 2 -Gear loop. During the shifting form 2 to 1, the brake belt is engaged and drain the oil through the 1-2 Gear shift valve. 

When the manual-operated valve is position of D-Gear, 3" -Gear, 2 -Gear or 1"-Gear, the transmission fluid flows into the end of valve spring. Ignore the signal pressure and keep the... 

When manual-operated valve is in position of P-Gear, R-Gear or N-Gear, the transmission fluid is drained and the reverse lock valve maybe affected by pressure S1 -S2 at the same time. 

The manual-operated valve transmission fluid (line pressure ) makes the clutch C2 to engagement. 

The computer needs the required information from the customer and select the necessary data through the manual. For example view the code, clear the error code and make the real-time operation. For detailed operating instruction refer to user s manual. The equipment can be used by the trained specialized persons, such as technician, machinist to test the electronic and loop problem related to transmission. The testable information includes the engine speed, rode (shaft speed), transmission fluid temperature, position of throttle position, status of solenoid valve and gear and position of operating lever. Additionally, it can be used to detect the current and stored problem. 

If a fluid power system is properly designed and used, it will provide smooth, flexible, uniform action without vibration, and is unaffected by variation of load. In case of an overload, an automatic release of pressure can be guaranteed, so that the system is protected against breakdown or excessive strain. Fluid power systems can provide widely variable motions in both rotary and linear transmission of power and the need for manual control can be minimized. In addition, fluid power systems are economical to operate. 

One of the most important properties of driveline fluids is their frictional performance in terms of both the level and durability. The fluid also has to be compatible with the components inside the transmission. Optimizing the frictional characteristics of a fluid for a particular application is absolutely critical to ensure trouble-free operation of the equipment, whether it be an automatic gearbox, synchronized manual gearbox or the wet brake system in a tractor. The problems that can be encountered are ... 

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