TRANSMISSION
Automotive Transmission is the system responsible for the transmitting of mechanical energy that is motion to the various wheels of the vehicles. The transmission contains key components such as Gearbox and the Clutch system. Power is transferred as motion from the engine to the gearbox to the differential through the propeller to the axles and shaft to the wheels of the vehicle.
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FAULTS ASSOCIATED WITH THE TRANSMISSION SYSTEM
The transmission system usually comes with faults either in the gearbox, clutch or differential. The gearbox is usually serviced according to the manufacturer’s recommendation; it can be repaired when a fault is noticed inside it.
The clutch system has several components which are usually serviceable and can be replaced when faulty.
The differential is also serviceable.
Symptoms of a faulty transmission system may include;
Low acceleration: when the vehicle refuses to accelerate even when the accelerator pedal is engaged and the rpm is high, it would likely be a faulty in the transmission system.
Gear not changing: when the gear ratio is not changed even when applied on the gear selector for a manual transmission or does not change even as the accelerator is been engaged, it could also be a fault in the Automotive transmission system.
Gear stuck within a range: sometime the gearing system can be stuck within a range of gear not allowing the vehicle accelerate above that range. This is also a common fault in the transmission system.
Clutch not engaging: a faulty clutch system which could be caused by a fault in any of the components in the clutch system could lead to the clutch not engaging properly. This will result in difficulty in changing the gear ratio.
Limp mode: when a fault in the transmission system is noticed the vehicle may program itself to limp mode causing the gearing to stock within a particular range of gear ratio. This is usually turned on by the ECU which is programmed to enable it as a safety feature; the limp mode would disappear when the fault is fixed in the transmission system.
THE ECU AND TRANSMISSION
Just as the engine is controlled and manage by the ECU so also is the transmission system controlled and manage by it. The transmission system has several sensors and actuators that are also connected to the ECU; these are responsible for the various features such as Limp Mode. A faulty ECU can also affect the transmission if it sends wrong information to the transmission causing it not to function properly.
AUTOMOTIVE COMPUTERIZED AND ELECTRICAL DIAGNOSTICS
With the advent of the On-board Diagnostic (OBD) protocol in vehicles automotive diagnostics, maintenance and repairs has become easier, accurate and time saving. With the use of an OBDII scanner, a multimeter or any other diagnostic tool, one can easily diagnose the fault of a vehicle and take the necessary repairs actions. This would ensure that the automobile technicians does not make wrong guesses, replace good components or damage other systems during troubleshooting.
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